./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --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_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/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_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/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_7e96cab1-968e-430f-88bf-a3cb244a8404/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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:30:54,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:30:54,613 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:30:54,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:30:54,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:30:54,642 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:30:54,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:30:54,643 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:30:54,644 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:30:54,645 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:30:54,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:30:54,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:30:54,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:30:54,647 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:30:54,648 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:30:54,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:30:54,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:30:54,649 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:30:54,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:30:54,650 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:30:54,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:30:54,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:30:54,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:30:54,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:30:54,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:30:54,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:30:54,654 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:30:54,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:30:54,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:30:54,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:30:54,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:30:54,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:30:54,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:30:54,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:30:54,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:30:54,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:30:54,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:30:54,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:30:54,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:30:54,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:30:54,658 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:30:54,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:30:54,659 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_7e96cab1-968e-430f-88bf-a3cb244a8404/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2023-11-29 06:30:54,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:30:54,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:30:54,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:30:54,924 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:30:54,924 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:30:54,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/string-2.i [2023-11-29 06:30:57,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:30:57,792 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:30:57,793 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i [2023-11-29 06:30:57,799 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data/adde49a17/a0a87710900c4590a7f617e78289665c/FLAG3afb8e56f [2023-11-29 06:30:57,810 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data/adde49a17/a0a87710900c4590a7f617e78289665c [2023-11-29 06:30:57,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:30:57,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:30:57,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:30:57,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:30:57,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:30:57,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:30:57" (1/1) ... [2023-11-29 06:30:57,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f91e29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:57, skipping insertion in model container [2023-11-29 06:30:57,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:30:57" (1/1) ... [2023-11-29 06:30:57,844 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:30:57,989 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_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i[896,909] [2023-11-29 06:30:58,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:30:58,019 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:30:58,030 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_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i[896,909] [2023-11-29 06:30:58,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:30:58,053 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:30:58,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58 WrapperNode [2023-11-29 06:30:58,053 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:30:58,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:30:58,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:30:58,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:30:58,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,089 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 131 [2023-11-29 06:30:58,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:30:58,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:30:58,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:30:58,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:30:58,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,117 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 06:30:58,117 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:30:58,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:30:58,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:30:58,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:30:58,138 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (1/1) ... [2023-11-29 06:30:58,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:30:58,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:30:58,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:30:58,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:30:58,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:30:58,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:30:58,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:30:58,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:30:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:30:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:30:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:30:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:30:58,316 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:30:58,319 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:30:58,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:30:58,534 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:30:58,534 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 06:30:58,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:30:58 BoogieIcfgContainer [2023-11-29 06:30:58,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:30:58,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:30:58,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:30:58,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:30:58,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:30:57" (1/3) ... [2023-11-29 06:30:58,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501d2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:30:58, skipping insertion in model container [2023-11-29 06:30:58,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:30:58" (2/3) ... [2023-11-29 06:30:58,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501d2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:30:58, skipping insertion in model container [2023-11-29 06:30:58,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:30:58" (3/3) ... [2023-11-29 06:30:58,545 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2023-11-29 06:30:58,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:30:58,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:30:58,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:30:58,624 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;@55838ee0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:30:58,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:30:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 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) [2023-11-29 06:30:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 06:30:58,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:30:58,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:30:58,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:30:58,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:30:58,643 INFO L85 PathProgramCache]: Analyzing trace with hash -771977748, now seen corresponding path program 1 times [2023-11-29 06:30:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:30:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010702024] [2023-11-29 06:30:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:30:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:30:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:30:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:30:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010702024] [2023-11-29 06:30:58,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010702024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:30:58,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:30:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:30:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593677462] [2023-11-29 06:30:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:30:58,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:30:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:30:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:30:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:30:58,915 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 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) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:30:58,974 INFO L93 Difference]: Finished difference Result 55 states and 92 transitions. [2023-11-29 06:30:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:30:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-29 06:30:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:30:58,986 INFO L225 Difference]: With dead ends: 55 [2023-11-29 06:30:58,986 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 06:30:58,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:30:58,993 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:30:58,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:30:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 06:30:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2023-11-29 06:30:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-29 06:30:59,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2023-11-29 06:30:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:30:59,030 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-29 06:30:59,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-29 06:30:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:30:59,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:30:59,031 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] [2023-11-29 06:30:59,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:30:59,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:30:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:30:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash -349035546, now seen corresponding path program 1 times [2023-11-29 06:30:59,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:30:59,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814545549] [2023-11-29 06:30:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:30:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:30:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:30:59,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:30:59,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814545549] [2023-11-29 06:30:59,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814545549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:30:59,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041888458] [2023-11-29 06:30:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:59,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:30:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:30:59,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:30:59,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:30:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:30:59,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:30:59,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:30:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:30:59,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:30:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:30:59,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041888458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:30:59,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:30:59,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 06:30:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965362949] [2023-11-29 06:30:59,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:30:59,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:30:59,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:30:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:30:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:30:59,308 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:30:59,404 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2023-11-29 06:30:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:30:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 20 [2023-11-29 06:30:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:30:59,406 INFO L225 Difference]: With dead ends: 77 [2023-11-29 06:30:59,406 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 06:30:59,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:30:59,408 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:30:59,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 65 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:30:59,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 06:30:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2023-11-29 06:30:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2023-11-29 06:30:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-11-29 06:30:59,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 20 [2023-11-29 06:30:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:30:59,416 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-11-29 06:30:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:30:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-11-29 06:30:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 06:30:59,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:30:59,417 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:30:59,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:30:59,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 06:30:59,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:30:59,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:30:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1067235070, now seen corresponding path program 2 times [2023-11-29 06:30:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:30:59,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002882386] [2023-11-29 06:30:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:59,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:30:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:30:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:30:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:30:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002882386] [2023-11-29 06:30:59,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002882386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:30:59,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810495523] [2023-11-29 06:30:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:30:59,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:30:59,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:30:59,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:30:59,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:30:59,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:30:59,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:30:59,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:30:59,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 06:31:00,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810495523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:00,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:31:00,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-29 06:31:00,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608991401] [2023-11-29 06:31:00,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:00,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:31:00,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:31:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:31:00,009 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:00,085 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-11-29 06:31:00,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:31:00,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 06:31:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:00,086 INFO L225 Difference]: With dead ends: 44 [2023-11-29 06:31:00,086 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 06:31:00,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:31:00,088 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:00,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:31:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 06:31:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 06:31:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-29 06:31:00,094 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2023-11-29 06:31:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:00,094 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-29 06:31:00,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-29 06:31:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:31:00,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:00,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:00,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:31:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 06:31:00,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:00,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash 88339939, now seen corresponding path program 1 times [2023-11-29 06:31:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65398933] [2023-11-29 06:31:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:31:00,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:00,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65398933] [2023-11-29 06:31:00,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65398933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:00,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872072821] [2023-11-29 06:31:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:00,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:00,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:00,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:00,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:31:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:00,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:31:00,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:31:00,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:31:00,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872072821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:00,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:00,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-11-29 06:31:00,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277278787] [2023-11-29 06:31:00,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:31:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:31:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:31:00,609 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:00,696 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2023-11-29 06:31:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:31:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 06:31:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:00,699 INFO L225 Difference]: With dead ends: 93 [2023-11-29 06:31:00,699 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 06:31:00,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:31:00,701 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:00,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 65 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:31:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 06:31:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2023-11-29 06:31:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2023-11-29 06:31:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-11-29 06:31:00,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2023-11-29 06:31:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:00,709 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-11-29 06:31:00,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-11-29 06:31:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:31:00,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:00,710 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:00,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:31:00,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:00,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:00,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1543018293, now seen corresponding path program 2 times [2023-11-29 06:31:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:00,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121254678] [2023-11-29 06:31:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 06:31:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121254678] [2023-11-29 06:31:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121254678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346416765] [2023-11-29 06:31:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:01,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:01,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:01,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:31:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:31:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:01,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:31:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 06:31:01,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:01,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346416765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:01,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:31:01,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 06:31:01,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150282670] [2023-11-29 06:31:01,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:01,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:31:01,293 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:01,311 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-11-29 06:31:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 30 [2023-11-29 06:31:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:01,313 INFO L225 Difference]: With dead ends: 38 [2023-11-29 06:31:01,313 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 06:31:01,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:31:01,314 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:01,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:31:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 06:31:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-29 06:31:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2023-11-29 06:31:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-29 06:31:01,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 30 [2023-11-29 06:31:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:01,321 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-29 06:31:01,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-29 06:31:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 06:31:01,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:01,322 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:01,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:31:01,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:01,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:01,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash 423708614, now seen corresponding path program 1 times [2023-11-29 06:31:01,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:01,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841307256] [2023-11-29 06:31:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:01,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 06:31:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841307256] [2023-11-29 06:31:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841307256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:01,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:01,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:31:01,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280081710] [2023-11-29 06:31:01,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:01,627 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:01,648 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2023-11-29 06:31:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 32 [2023-11-29 06:31:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:01,650 INFO L225 Difference]: With dead ends: 49 [2023-11-29 06:31:01,650 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 06:31:01,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:01,651 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:01,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:31:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 06:31:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 06:31:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2023-11-29 06:31:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-29 06:31:01,658 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2023-11-29 06:31:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:01,658 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-29 06:31:01,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-29 06:31:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:31:01,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:01,660 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:01,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:31:01,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:01,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1689712959, now seen corresponding path program 1 times [2023-11-29 06:31:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:01,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381729809] [2023-11-29 06:31:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:31:01,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:31:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:31:01,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 06:31:01,751 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:31:01,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:31:01,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:31:01,756 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-11-29 06:31:01,759 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:31:01,788 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet15 could not be translated [2023-11-29 06:31:01,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:31:01 BoogieIcfgContainer [2023-11-29 06:31:01,800 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:31:01,800 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:31:01,800 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:31:01,801 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:31:01,801 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:30:58" (3/4) ... [2023-11-29 06:31:01,803 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 06:31:01,803 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:31:01,804 INFO L158 Benchmark]: Toolchain (without parser) took 3990.10ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 134.8MB in the beginning and 144.5MB in the end (delta: -9.6MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2023-11-29 06:31:01,804 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 91.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:31:01,805 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.94ms. Allocated memory is still 169.9MB. Free memory was 134.8MB in the beginning and 139.4MB in the end (delta: -4.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 06:31:01,805 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.17ms. Allocated memory is still 169.9MB. Free memory was 139.4MB in the beginning and 137.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:31:01,805 INFO L158 Benchmark]: Boogie Preprocessor took 45.76ms. Allocated memory is still 169.9MB. Free memory was 137.9MB in the beginning and 135.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:31:01,806 INFO L158 Benchmark]: RCFGBuilder took 398.75ms. Allocated memory is still 169.9MB. Free memory was 135.6MB in the beginning and 121.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-29 06:31:01,806 INFO L158 Benchmark]: TraceAbstraction took 3261.94ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 120.5MB in the beginning and 144.5MB in the end (delta: -23.9MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2023-11-29 06:31:01,806 INFO L158 Benchmark]: Witness Printer took 3.10ms. Allocated memory is still 205.5MB. Free memory is still 144.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:31:01,808 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 119.5MB. Free memory is still 91.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.94ms. Allocated memory is still 169.9MB. Free memory was 134.8MB in the beginning and 139.4MB in the end (delta: -4.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.17ms. Allocated memory is still 169.9MB. Free memory was 139.4MB in the beginning and 137.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.76ms. Allocated memory is still 169.9MB. Free memory was 137.9MB in the beginning and 135.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 398.75ms. Allocated memory is still 169.9MB. Free memory was 135.6MB in the beginning and 121.2MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 3261.94ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 120.5MB in the beginning and 144.5MB in the end (delta: -23.9MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Witness Printer took 3.10ms. Allocated memory is still 205.5MB. Free memory is still 144.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet15 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L35] COND FALSE !(i<5) VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L39] COND FALSE !(i<5) VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={6:0}, string_B={7:0}] [L55] COND TRUE (inc_B-1)<nc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2023-11-29 06:31:04,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:31:04,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:31:04,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:31:04,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:31:04,192 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:31:04,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/string-2.i [2023-11-29 06:31:06,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:31:07,160 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:31:07,161 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i [2023-11-29 06:31:07,170 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data/4c9f0fabd/2de95064538a4267885baaa1cbfad4fc/FLAGa9a400234 [2023-11-29 06:31:07,187 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/data/4c9f0fabd/2de95064538a4267885baaa1cbfad4fc [2023-11-29 06:31:07,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:31:07,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:31:07,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:31:07,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:31:07,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:31:07,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9b2fc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07, skipping insertion in model container [2023-11-29 06:31:07,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,227 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:31:07,403 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_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i[896,909] [2023-11-29 06:31:07,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:31:07,442 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:31:07,458 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_7e96cab1-968e-430f-88bf-a3cb244a8404/sv-benchmarks/c/loops/string-2.i[896,909] [2023-11-29 06:31:07,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:31:07,489 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:31:07,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07 WrapperNode [2023-11-29 06:31:07,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:31:07,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:31:07,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:31:07,491 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:31:07,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,536 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2023-11-29 06:31:07,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:31:07,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:31:07,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:31:07,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:31:07,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,555 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,571 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 06:31:07,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:31:07,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:31:07,594 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:31:07,594 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:31:07,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (1/1) ... [2023-11-29 06:31:07,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:31:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:07,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:31:07,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:31:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:31:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-29 06:31:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-29 06:31:07,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-29 06:31:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 06:31:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 06:31:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 06:31:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:31:07,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:31:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:31:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-11-29 06:31:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-11-29 06:31:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-11-29 06:31:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:31:07,772 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:31:07,775 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:31:08,023 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:31:08,054 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:31:08,055 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 06:31:08,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:08 BoogieIcfgContainer [2023-11-29 06:31:08,055 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:31:08,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:31:08,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:31:08,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:31:08,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:31:07" (1/3) ... [2023-11-29 06:31:08,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409133d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:31:08, skipping insertion in model container [2023-11-29 06:31:08,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:07" (2/3) ... [2023-11-29 06:31:08,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409133d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:31:08, skipping insertion in model container [2023-11-29 06:31:08,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:08" (3/3) ... [2023-11-29 06:31:08,065 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2023-11-29 06:31:08,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:31:08,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:31:08,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:31:08,148 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;@39a125c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:31:08,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:31:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 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) [2023-11-29 06:31:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 06:31:08,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:08,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:08,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:08,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2109911089, now seen corresponding path program 1 times [2023-11-29 06:31:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:08,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32693041] [2023-11-29 06:31:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:08,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:08,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:08,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 06:31:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:08,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:31:08,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:08,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:08,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32693041] [2023-11-29 06:31:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32693041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:08,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:08,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:31:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093664169] [2023-11-29 06:31:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:31:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:31:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:31:08,342 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:08,375 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2023-11-29 06:31:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:31:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2023-11-29 06:31:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:08,386 INFO L225 Difference]: With dead ends: 42 [2023-11-29 06:31:08,386 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 06:31:08,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:31:08,394 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:08,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:31:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 06:31:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 06:31:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-29 06:31:08,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 15 [2023-11-29 06:31:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:08,430 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-29 06:31:08,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-29 06:31:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 06:31:08,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:08,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:08,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:31:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:08,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:08,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1813328509, now seen corresponding path program 1 times [2023-11-29 06:31:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289357536] [2023-11-29 06:31:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:08,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:08,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:08,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:08,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 06:31:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:08,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:31:08,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:08,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:08,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289357536] [2023-11-29 06:31:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289357536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:08,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:08,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:31:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254251319] [2023-11-29 06:31:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:08,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:31:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:08,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:31:08,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:31:08,771 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:08,836 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-11-29 06:31:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:31:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2023-11-29 06:31:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:08,839 INFO L225 Difference]: With dead ends: 44 [2023-11-29 06:31:08,839 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 06:31:08,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:31:08,841 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:08,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:31:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 06:31:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2023-11-29 06:31:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-29 06:31:08,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2023-11-29 06:31:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:08,849 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-29 06:31:08,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-29 06:31:08,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 06:31:08,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:08,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:08,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 06:31:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:09,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:09,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash 707271104, now seen corresponding path program 1 times [2023-11-29 06:31:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349739176] [2023-11-29 06:31:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:09,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:09,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 06:31:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:09,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:31:09,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:09,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:09,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349739176] [2023-11-29 06:31:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349739176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:09,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:31:09,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-29 06:31:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210612025] [2023-11-29 06:31:09,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:09,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:31:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:09,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:31:09,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:31:09,197 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:09,384 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-11-29 06:31:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:31:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 19 [2023-11-29 06:31:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:09,386 INFO L225 Difference]: With dead ends: 69 [2023-11-29 06:31:09,386 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 06:31:09,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:31:09,387 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:09,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 68 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:31:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 06:31:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2023-11-29 06:31:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-29 06:31:09,394 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2023-11-29 06:31:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:09,394 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-29 06:31:09,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-29 06:31:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:31:09,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:09,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:09,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 06:31:09,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:09,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:09,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash 99608125, now seen corresponding path program 2 times [2023-11-29 06:31:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:09,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518029346] [2023-11-29 06:31:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:09,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:09,599 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:09,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 06:31:09,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:31:09,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:09,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:31:09,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 06:31:09,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:09,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518029346] [2023-11-29 06:31:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518029346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:09,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:31:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603876264] [2023-11-29 06:31:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:31:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:31:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:31:09,747 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:09,829 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-11-29 06:31:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:31:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 25 [2023-11-29 06:31:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:09,830 INFO L225 Difference]: With dead ends: 39 [2023-11-29 06:31:09,831 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 06:31:09,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:31:09,832 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:09,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:31:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 06:31:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-29 06:31:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-29 06:31:09,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 25 [2023-11-29 06:31:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:09,840 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-29 06:31:09,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-29 06:31:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:31:09,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:09,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:09,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 06:31:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:10,042 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:10,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1267443896, now seen corresponding path program 1 times [2023-11-29 06:31:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916127555] [2023-11-29 06:31:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:10,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:10,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 06:31:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:10,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:31:10,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:31:10,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:31:10,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916127555] [2023-11-29 06:31:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916127555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:10,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:31:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 06:31:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221734287] [2023-11-29 06:31:10,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:10,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:31:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:31:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:31:10,279 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:10,675 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2023-11-29 06:31:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:31:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 06:31:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:10,677 INFO L225 Difference]: With dead ends: 84 [2023-11-29 06:31:10,677 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 06:31:10,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:31:10,678 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:10,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 168 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:31:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 06:31:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 31. [2023-11-29 06:31:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2023-11-29 06:31:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-29 06:31:10,686 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 27 [2023-11-29 06:31:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:10,686 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-29 06:31:10,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-29 06:31:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 06:31:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:10,687 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:10,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 06:31:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:10,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:10,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -925404741, now seen corresponding path program 2 times [2023-11-29 06:31:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:10,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219648891] [2023-11-29 06:31:10,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:10,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:10,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:10,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:10,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 06:31:10,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:31:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:10,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:31:10,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 06:31:11,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:11,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219648891] [2023-11-29 06:31:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219648891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:11,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:31:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179279302] [2023-11-29 06:31:11,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:11,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:11,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:11,063 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:11,133 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-11-29 06:31:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 29 [2023-11-29 06:31:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:11,134 INFO L225 Difference]: With dead ends: 37 [2023-11-29 06:31:11,134 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 06:31:11,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:31:11,136 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:11,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:31:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 06:31:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-11-29 06:31:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2023-11-29 06:31:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-29 06:31:11,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 29 [2023-11-29 06:31:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:11,143 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-29 06:31:11,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-29 06:31:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 06:31:11,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:11,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:11,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 06:31:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:11,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:11,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -205380834, now seen corresponding path program 1 times [2023-11-29 06:31:11,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:11,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2684844] [2023-11-29 06:31:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:11,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:11,350 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:11,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 06:31:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:11,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:31:11,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 06:31:11,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:11,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:31:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2684844] [2023-11-29 06:31:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2684844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:11,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:11,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:31:11,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385144856] [2023-11-29 06:31:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:11,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:11,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:31:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:11,484 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:11,541 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-11-29 06:31:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 31 [2023-11-29 06:31:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:11,543 INFO L225 Difference]: With dead ends: 47 [2023-11-29 06:31:11,543 INFO L226 Difference]: Without dead ends: 34 [2023-11-29 06:31:11,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:11,544 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:11,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:31:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-29 06:31:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-29 06:31:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-29 06:31:11,550 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 31 [2023-11-29 06:31:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:11,550 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-29 06:31:11,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-29 06:31:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:31:11,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:11,552 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:11,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 06:31:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:11,755 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:11,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1974938627, now seen corresponding path program 1 times [2023-11-29 06:31:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:31:11,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977708408] [2023-11-29 06:31:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:11,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:31:11,758 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 06:31:11,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 06:31:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:31:11,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 06:31:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 06:31:12,012 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-29 06:31:12,013 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 06:31:12,014 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-29 06:31:12,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 06:31:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:31:12,231 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-11-29 06:31:12,235 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:31:12,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:31:12 BoogieIcfgContainer [2023-11-29 06:31:12,269 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:31:12,270 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:31:12,270 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:31:12,270 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:31:12,270 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:08" (3/4) ... [2023-11-29 06:31:12,271 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 06:31:12,314 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e96cab1-968e-430f-88bf-a3cb244a8404/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:31:12,314 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:31:12,315 INFO L158 Benchmark]: Toolchain (without parser) took 5123.67ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 48.1MB in the end (delta: 25.0MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,315 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 62.9MB. Free memory was 39.2MB in the beginning and 39.1MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:31:12,316 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.39ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 61.5MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,316 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.93ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 59.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,316 INFO L158 Benchmark]: Boogie Preprocessor took 55.67ms. Allocated memory is still 96.5MB. Free memory was 59.6MB in the beginning and 57.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,317 INFO L158 Benchmark]: RCFGBuilder took 461.67ms. Allocated memory is still 96.5MB. Free memory was 57.3MB in the beginning and 68.8MB in the end (delta: -11.5MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,317 INFO L158 Benchmark]: TraceAbstraction took 4210.65ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 51.0MB in the end (delta: 17.2MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,317 INFO L158 Benchmark]: Witness Printer took 44.99ms. Allocated memory is still 96.5MB. Free memory was 51.0MB in the beginning and 48.1MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:31:12,319 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 62.9MB. Free memory was 39.2MB in the beginning and 39.1MB in the end (delta: 81.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.39ms. Allocated memory is still 96.5MB. Free memory was 73.1MB in the beginning and 61.5MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.93ms. Allocated memory is still 96.5MB. Free memory was 61.5MB in the beginning and 59.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.67ms. Allocated memory is still 96.5MB. Free memory was 59.6MB in the beginning and 57.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 461.67ms. Allocated memory is still 96.5MB. Free memory was 57.3MB in the beginning and 68.8MB in the end (delta: -11.5MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4210.65ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 51.0MB in the end (delta: 17.2MB). Peak memory consumption was 18.4MB. Max. memory is 16.1GB. * Witness Printer took 44.99ms. Allocated memory is still 96.5MB. Free memory was 51.0MB in the beginning and 48.1MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={7:0}, string_B={3:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={7:0}, string_B={3:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={7:0}, string_B={3:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={7:0}, string_B={3:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={7:0}, string_B={3:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={7:0}, string_B={3:0}] [L35] COND FALSE !(i<5) VAL [found=0, i=5, string_A={7:0}, string_B={3:0}] [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={7:0}, string_B={3:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={7:0}, string_B={3:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={7:0}, string_B={3:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={7:0}, string_B={3:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={7:0}, string_B={3:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={7:0}, string_B={3:0}] [L39] COND FALSE !(i<5) VAL [found=0, i=5, string_A={7:0}, string_B={3:0}] [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={7:0}, string_B={3:0}] [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={7:0}, string_B={3:0}] [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={7:0}, string_B={3:0}] [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={7:0}, string_B={3:0}] [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={7:0}, string_B={3:0}] [L55] COND TRUE (inc_B-1)<