./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd --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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:55:24,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:55:25,041 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 13:55:25,048 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:55:25,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:55:25,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:55:25,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:55:25,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:55:25,094 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:55:25,094 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:55:25,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:55:25,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:55:25,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:55:25,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:55:25,097 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:55:25,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:55:25,098 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:55:25,099 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:55:25,099 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:55:25,099 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:55:25,099 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:55:25,099 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:55:25,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:55:25,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:55:25,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:55:25,100 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:55:25,100 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:55:25,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:55:25,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:55:25,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:55:25,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:55:25,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:55:25,102 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:55:25,102 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:55:25,103 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:55:25,103 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:55:25,103 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd 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 -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2024-11-13 13:55:25,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:55:25,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:55:25,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:55:25,482 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:55:25,482 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:55:25,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-fpi/ifeqn4.c Unable to find full path for "g++" [2024-11-13 13:55:27,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:55:27,677 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:55:27,678 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c [2024-11-13 13:55:27,686 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/811f746bf/01346ea649134c62911fd268f8406451/FLAG922bc02b3 [2024-11-13 13:55:27,703 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/811f746bf/01346ea649134c62911fd268f8406451 [2024-11-13 13:55:27,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:55:27,707 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:55:27,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:55:27,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:55:27,716 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:55:27,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:55:27" (1/1) ... [2024-11-13 13:55:27,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701a4c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:27, skipping insertion in model container [2024-11-13 13:55:27,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:55:27" (1/1) ... [2024-11-13 13:55:27,742 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:55:27,920 WARN L250 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_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2024-11-13 13:55:27,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:55:27,969 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:55:27,984 WARN L250 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_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2024-11-13 13:55:28,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:55:28,030 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:55:28,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28 WrapperNode [2024-11-13 13:55:28,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:55:28,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:55:28,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:55:28,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:55:28,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,083 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-13 13:55:28,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:55:28,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:55:28,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:55:28,085 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:55:28,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,107 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 4 writes are split as follows [0, 2, 2]. [2024-11-13 13:55:28,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,119 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:55:28,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:55:28,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:55:28,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:55:28,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (1/1) ... [2024-11-13 13:55:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:55:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:28,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:55:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:55:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:55:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:55:28,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:55:28,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:55:28,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:55:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:55:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 13:55:28,310 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:55:28,312 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:55:28,563 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-13 13:55:28,567 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:55:28,581 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:55:28,581 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 13:55:28,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:55:28 BoogieIcfgContainer [2024-11-13 13:55:28,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:55:28,586 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:55:28,587 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:55:28,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:55:28,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:55:27" (1/3) ... [2024-11-13 13:55:28,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:55:28, skipping insertion in model container [2024-11-13 13:55:28,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:55:28" (2/3) ... [2024-11-13 13:55:28,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5498e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:55:28, skipping insertion in model container [2024-11-13 13:55:28,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:55:28" (3/3) ... [2024-11-13 13:55:28,598 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2024-11-13 13:55:28,620 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:55:28,622 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ifeqn4.c that has 1 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 13:55:28,706 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:55:28,725 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f60e04c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:55:28,725 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 13:55:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) [2024-11-13 13:55:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 13:55:28,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:28,742 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:28,742 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:28,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2024-11-13 13:55:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467018191] [2024-11-13 13:55:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:28,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467018191] [2024-11-13 13:55:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467018191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:55:28,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:55:28,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:55:28,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118630993] [2024-11-13 13:55:28,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:55:28,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 13:55:28,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 13:55:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 13:55:28,987 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-13 13:55:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:29,001 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-11-13 13:55:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 13:55:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-13 13:55:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:29,010 INFO L225 Difference]: With dead ends: 40 [2024-11-13 13:55:29,010 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 13:55:29,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 13:55:29,016 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:29,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 13:55:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 13:55:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-13 13:55:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2024-11-13 13:55:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-13 13:55:29,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2024-11-13 13:55:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:29,049 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-13 13:55:29,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-13 13:55:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-13 13:55:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 13:55:29,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:29,050 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:29,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:55:29,050 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:29,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2024-11-13 13:55:29,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:29,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701529934] [2024-11-13 13:55:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:29,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:29,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:29,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701529934] [2024-11-13 13:55:29,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701529934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:55:29,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:55:29,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:55:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340270619] [2024-11-13 13:55:29,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:55:29,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:55:29,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:55:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:55:29,245 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-13 13:55:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:29,346 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-11-13 13:55:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:55:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2024-11-13 13:55:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:29,349 INFO L225 Difference]: With dead ends: 42 [2024-11-13 13:55:29,349 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 13:55:29,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:55:29,350 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:29,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:55:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 13:55:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2024-11-13 13:55:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2024-11-13 13:55:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-13 13:55:29,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2024-11-13 13:55:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:29,358 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-13 13:55:29,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-13 13:55:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-13 13:55:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 13:55:29,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:29,359 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:29,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:55:29,360 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:29,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2024-11-13 13:55:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:29,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443049876] [2024-11-13 13:55:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:29,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 13:55:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993702834] [2024-11-13 13:55:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:29,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:29,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:29,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:55:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:29,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 13:55:29,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:29,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:55:29,744 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:55:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:29,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443049876] [2024-11-13 13:55:29,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 13:55:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993702834] [2024-11-13 13:55:29,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993702834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:55:29,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:55:29,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:55:29,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231823334] [2024-11-13 13:55:29,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:55:29,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:55:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:55:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:55:29,750 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-13 13:55:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:29,904 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-13 13:55:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:55:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2024-11-13 13:55:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:29,905 INFO L225 Difference]: With dead ends: 36 [2024-11-13 13:55:29,907 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 13:55:29,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:55:29,909 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:29,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 13:55:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 13:55:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-11-13 13:55:29,920 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) [2024-11-13 13:55:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-13 13:55:29,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2024-11-13 13:55:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:29,923 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-13 13:55:29,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-13 13:55:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-13 13:55:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 13:55:29,924 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:29,924 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:29,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:55:30,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:30,125 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:30,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1825280711, now seen corresponding path program 1 times [2024-11-13 13:55:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:30,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920569516] [2024-11-13 13:55:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:30,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:55:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920569516] [2024-11-13 13:55:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920569516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:55:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728455613] [2024-11-13 13:55:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:30,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:30,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:55:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:30,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 13:55:30,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:55:30,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:55:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:55:30,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728455613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:55:30,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:55:30,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-13 13:55:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342434418] [2024-11-13 13:55:30,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:55:30,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:55:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:55:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:55:30,781 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2024-11-13 13:55:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:30,982 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2024-11-13 13:55:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:55:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) Word has length 21 [2024-11-13 13:55:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:30,984 INFO L225 Difference]: With dead ends: 64 [2024-11-13 13:55:30,984 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 13:55:30,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:55:30,987 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:30,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 13:55:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 13:55:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2024-11-13 13:55:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-13 13:55:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-13 13:55:30,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2024-11-13 13:55:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:30,999 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-13 13:55:30,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2024-11-13 13:55:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-13 13:55:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 13:55:31,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:31,000 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:31,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:55:31,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:31,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:31,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:31,202 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2024-11-13 13:55:31,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747317255] [2024-11-13 13:55:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 13:55:31,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105012903] [2024-11-13 13:55:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:31,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:31,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:55:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:31,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:55:31,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:31,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:31,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-13 13:55:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:31,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:55:32,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-13 13:55:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:55:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747317255] [2024-11-13 13:55:32,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 13:55:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105012903] [2024-11-13 13:55:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105012903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:55:32,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:55:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-13 13:55:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141440508] [2024-11-13 13:55:32,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:55:32,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:55:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:55:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:55:32,131 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2024-11-13 13:55:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:32,605 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2024-11-13 13:55:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:55:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-13 13:55:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:32,608 INFO L225 Difference]: With dead ends: 99 [2024-11-13 13:55:32,612 INFO L226 Difference]: Without dead ends: 80 [2024-11-13 13:55:32,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:55:32,614 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:32,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 97 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 13:55:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-13 13:55:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 39. [2024-11-13 13:55:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 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) [2024-11-13 13:55:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2024-11-13 13:55:32,634 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 24 [2024-11-13 13:55:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:32,634 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2024-11-13 13:55:32,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2024-11-13 13:55:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2024-11-13 13:55:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 13:55:32,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:32,635 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:32,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:55:32,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:32,836 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:32,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1537893212, now seen corresponding path program 1 times [2024-11-13 13:55:32,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:32,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173070131] [2024-11-13 13:55:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:32,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 13:55:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165993398] [2024-11-13 13:55:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:32,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:32,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:32,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:32,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:55:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:33,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 13:55:33,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:33,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:33,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 13:55:33,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:33,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 13:55:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:33,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:55:34,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-13 13:55:34,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:55:34,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2024-11-13 13:55:34,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-13 13:55:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:34,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173070131] [2024-11-13 13:55:34,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 13:55:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165993398] [2024-11-13 13:55:34,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165993398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:55:34,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:55:34,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2024-11-13 13:55:34,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617958502] [2024-11-13 13:55:34,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:55:34,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 13:55:34,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 13:55:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-13 13:55:34,784 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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) [2024-11-13 13:55:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:39,998 INFO L93 Difference]: Finished difference Result 219 states and 252 transitions. [2024-11-13 13:55:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 13:55:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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 [2024-11-13 13:55:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:40,003 INFO L225 Difference]: With dead ends: 219 [2024-11-13 13:55:40,003 INFO L226 Difference]: Without dead ends: 217 [2024-11-13 13:55:40,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 13:55:40,009 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 451 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:40,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 167 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 13:55:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-13 13:55:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 100. [2024-11-13 13:55:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 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) [2024-11-13 13:55:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2024-11-13 13:55:40,046 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 27 [2024-11-13 13:55:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:40,046 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2024-11-13 13:55:40,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 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) [2024-11-13 13:55:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2024-11-13 13:55:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 13:55:40,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:40,047 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:40,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:55:40,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:40,252 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:40,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 965358498, now seen corresponding path program 2 times [2024-11-13 13:55:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583912388] [2024-11-13 13:55:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:55:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:55:40,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:55:40,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583912388] [2024-11-13 13:55:40,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583912388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:55:40,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660951527] [2024-11-13 13:55:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:55:40,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:40,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:40,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:40,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:55:40,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:55:40,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:55:40,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:55:40,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:55:40,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:55:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 13:55:40,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660951527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:55:40,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:55:40,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-13 13:55:40,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976588030] [2024-11-13 13:55:40,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:55:40,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:55:40,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:55:40,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:55:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:55:40,865 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2024-11-13 13:55:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:55:41,085 INFO L93 Difference]: Finished difference Result 195 states and 239 transitions. [2024-11-13 13:55:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:55:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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 [2024-11-13 13:55:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:55:41,087 INFO L225 Difference]: With dead ends: 195 [2024-11-13 13:55:41,088 INFO L226 Difference]: Without dead ends: 125 [2024-11-13 13:55:41,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:55:41,089 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 13:55:41,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 13:55:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-13 13:55:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2024-11-13 13:55:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 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) [2024-11-13 13:55:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2024-11-13 13:55:41,115 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 30 [2024-11-13 13:55:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:55:41,115 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2024-11-13 13:55:41,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 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) [2024-11-13 13:55:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2024-11-13 13:55:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 13:55:41,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:55:41,116 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:55:41,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:55:41,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:41,321 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:55:41,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:55:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2020368261, now seen corresponding path program 3 times [2024-11-13 13:55:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:55:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451307818] [2024-11-13 13:55:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:55:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:55:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 13:55:41,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072365493] [2024-11-13 13:55:41,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:55:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:55:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:55:41,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:55:41,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:55:41,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 13:55:41,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:55:41,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 13:55:41,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:55:41,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:42,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 13:55:42,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:55:42,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2024-11-13 13:55:42,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 13:55:42,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 13:55:42,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:55:42,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-13 13:55:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:55:42,864 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:55:43,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2024-11-13 13:55:43,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:55:43,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 502 [2024-11-13 13:56:01,014 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:56:29,438 WARN L286 SmtUtils]: Spent 24.21s on a formula simplification. DAG size of input: 80 DAG size of output: 77 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:56:37,708 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:56:50,073 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:57:06,496 WARN L286 SmtUtils]: Spent 12.17s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:57:06,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 13:57:06,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2024-11-13 13:57:06,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:06,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1530 treesize of output 1338 [2024-11-13 13:57:07,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2024-11-13 13:57:07,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:07,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1754 treesize of output 1382 [2024-11-13 13:57:11,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2024-11-13 13:57:11,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2024-11-13 13:57:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:57:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451307818] [2024-11-13 13:57:12,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 13:57:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072365493] [2024-11-13 13:57:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072365493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:57:12,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:57:12,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2024-11-13 13:57:12,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973318939] [2024-11-13 13:57:12,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 13:57:12,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 13:57:12,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:57:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 13:57:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 13:57:12,018 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 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) [2024-11-13 13:57:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:57:40,096 INFO L93 Difference]: Finished difference Result 490 states and 572 transitions. [2024-11-13 13:57:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-13 13:57:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 13:57:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:57:40,099 INFO L225 Difference]: With dead ends: 490 [2024-11-13 13:57:40,099 INFO L226 Difference]: Without dead ends: 391 [2024-11-13 13:57:40,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=2698, Invalid=12554, Unknown=0, NotChecked=0, Total=15252 [2024-11-13 13:57:40,106 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 958 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 13:57:40,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 347 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 13:57:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-11-13 13:57:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 191. [2024-11-13 13:57:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.268421052631579) internal successors, (241), 190 states have internal predecessors, (241), 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) [2024-11-13 13:57:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 241 transitions. [2024-11-13 13:57:40,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 241 transitions. Word has length 36 [2024-11-13 13:57:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:57:40,174 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 241 transitions. [2024-11-13 13:57:40,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 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) [2024-11-13 13:57:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 241 transitions. [2024-11-13 13:57:40,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 13:57:40,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:57:40,177 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:57:40,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 13:57:40,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:57:40,378 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:57:40,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:57:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2024-11-13 13:57:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:57:40,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163026469] [2024-11-13 13:57:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:57:40,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:57:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:57:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:40,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:57:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163026469] [2024-11-13 13:57:40,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163026469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:57:40,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302326649] [2024-11-13 13:57:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:57:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:57:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:57:40,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:57:40,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:57:40,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:57:40,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:57:40,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:57:40,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:57:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:57:41,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:57:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:57:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302326649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:57:41,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:57:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2024-11-13 13:57:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248193134] [2024-11-13 13:57:41,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:57:41,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:57:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:57:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:57:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:57:41,144 INFO L87 Difference]: Start difference. First operand 191 states and 241 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:57:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:57:41,516 INFO L93 Difference]: Finished difference Result 306 states and 368 transitions. [2024-11-13 13:57:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:57:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 13:57:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:57:41,518 INFO L225 Difference]: With dead ends: 306 [2024-11-13 13:57:41,518 INFO L226 Difference]: Without dead ends: 192 [2024-11-13 13:57:41,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:57:41,520 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:57:41,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 13:57:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-13 13:57:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 153. [2024-11-13 13:57:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.243421052631579) internal successors, (189), 152 states have internal predecessors, (189), 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) [2024-11-13 13:57:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2024-11-13 13:57:41,561 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 36 [2024-11-13 13:57:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:57:41,561 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2024-11-13 13:57:41,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:57:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2024-11-13 13:57:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 13:57:41,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:57:41,563 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:57:41,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:57:41,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 13:57:41,764 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:57:41,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:57:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1070520436, now seen corresponding path program 4 times [2024-11-13 13:57:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:57:41,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528440236] [2024-11-13 13:57:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:57:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:57:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:57:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:57:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:57:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528440236] [2024-11-13 13:57:42,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528440236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:57:42,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014397510] [2024-11-13 13:57:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:57:42,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:57:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:57:42,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:57:42,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:57:42,169 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:57:42,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:57:42,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:57:42,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:57:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:57:42,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:57:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 13:57:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014397510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:57:42,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:57:42,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-13 13:57:42,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925346453] [2024-11-13 13:57:42,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:57:42,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 13:57:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:57:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 13:57:42,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:57:42,600 INFO L87 Difference]: Start difference. First operand 153 states and 189 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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) [2024-11-13 13:57:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:57:43,497 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2024-11-13 13:57:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 13:57:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 13:57:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:57:43,498 INFO L225 Difference]: With dead ends: 278 [2024-11-13 13:57:43,499 INFO L226 Difference]: Without dead ends: 132 [2024-11-13 13:57:43,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:57:43,500 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 124 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 13:57:43,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 152 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 13:57:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-13 13:57:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 70. [2024-11-13 13:57:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 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) [2024-11-13 13:57:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2024-11-13 13:57:43,527 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 36 [2024-11-13 13:57:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:57:43,527 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2024-11-13 13:57:43,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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) [2024-11-13 13:57:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2024-11-13 13:57:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 13:57:43,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:57:43,528 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:57:43,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:57:43,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:57:43,729 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:57:43,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:57:43,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1096318795, now seen corresponding path program 3 times [2024-11-13 13:57:43,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:57:43,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172920819] [2024-11-13 13:57:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:57:43,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:57:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:57:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:57:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172920819] [2024-11-13 13:57:44,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172920819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:57:44,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708020006] [2024-11-13 13:57:44,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:57:44,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:57:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:57:44,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:57:44,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:57:44,861 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 13:57:44,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:57:44,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 13:57:44,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:57:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:45,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:57:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:45,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708020006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:57:45,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:57:45,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-13 13:57:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836057609] [2024-11-13 13:57:45,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:57:45,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 13:57:45,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:57:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 13:57:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:57:45,261 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2024-11-13 13:57:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 13:57:45,652 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2024-11-13 13:57:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:57:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-13 13:57:45,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 13:57:45,653 INFO L225 Difference]: With dead ends: 123 [2024-11-13 13:57:45,653 INFO L226 Difference]: Without dead ends: 103 [2024-11-13 13:57:45,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-13 13:57:45,654 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 13:57:45,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 87 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 13:57:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-13 13:57:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 70. [2024-11-13 13:57:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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) [2024-11-13 13:57:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-11-13 13:57:45,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 39 [2024-11-13 13:57:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 13:57:45,685 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-11-13 13:57:45,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2024-11-13 13:57:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-11-13 13:57:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 13:57:45,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 13:57:45,686 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:57:45,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:57:45,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 13:57:45,887 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 13:57:45,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:57:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1499782974, now seen corresponding path program 5 times [2024-11-13 13:57:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:57:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206012370] [2024-11-13 13:57:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:57:45,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:57:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 13:57:46,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139208746] [2024-11-13 13:57:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:57:46,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:57:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:57:46,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:57:46,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:57:46,875 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 13:57:46,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:57:46,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-13 13:57:46,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:57:46,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:57:47,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2024-11-13 13:57:47,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:47,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2024-11-13 13:57:47,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:47,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2024-11-13 13:57:47,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:57:47,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2024-11-13 13:57:47,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:47,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2024-11-13 13:57:47,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:47,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 35 [2024-11-13 13:57:47,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:47,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 39 [2024-11-13 13:57:48,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:57:48,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 37 [2024-11-13 13:57:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:57:48,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:18,870 WARN L286 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 90 DAG size of output: 87 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:58:36,175 WARN L286 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 13:58:54,393 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:59:02,407 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:59:19,164 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 13:59:31,185 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:01:13,567 WARN L286 SmtUtils]: Spent 1.49m on a formula simplification. DAG size of input: 128 DAG size of output: 124 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:01:21,759 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:01:29,776 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:01:50,034 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:02:03,969 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:02:11,985 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:02:24,217 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:03:06,345 WARN L286 SmtUtils]: Spent 36.61s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:03:35,466 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:04:06,776 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:05:23,487 WARN L286 SmtUtils]: Spent 1.13m on a formula simplification. DAG size of input: 149 DAG size of output: 141 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:05:35,570 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:05:47,614 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:06:25,228 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:06:37,249 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 14:07:31,348 WARN L286 SmtUtils]: Spent 44.62s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:07:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:07:31,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:07:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206012370] [2024-11-13 14:07:31,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 14:07:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139208746] [2024-11-13 14:07:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139208746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:07:31,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:07:31,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2024-11-13 14:07:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577897579] [2024-11-13 14:07:31,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:07:31,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 14:07:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:07:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 14:07:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1513, Unknown=1, NotChecked=0, Total=1722 [2024-11-13 14:07:31,358 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:08:37,428 WARN L286 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 127 DAG size of output: 117 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 14:10:01,298 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-13 14:10:01,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-13 14:10:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:10:01,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 350.5s TimeCoverageRelationStatistics Valid=216, Invalid=1589, Unknown=1, NotChecked=0, Total=1806 [2024-11-13 14:10:01,300 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:01,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 61 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 14:10:01,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:10:01,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:01,502 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:294) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:373) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 54 more [2024-11-13 14:10:01,506 INFO L158 Benchmark]: Toolchain (without parser) took 873799.02ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 119.0MB in the beginning and 338.2MB in the end (delta: -219.2MB). Peak memory consumption was 250.5MB. Max. memory is 16.1GB. [2024-11-13 14:10:01,506 INFO L158 Benchmark]: CDTParser took 1.53ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:10:01,507 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.36ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 107.5MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:10:01,507 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.19ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 106.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 14:10:01,507 INFO L158 Benchmark]: Boogie Preprocessor took 38.71ms. Allocated memory is still 142.6MB. Free memory was 106.2MB in the beginning and 104.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:10:01,508 INFO L158 Benchmark]: RCFGBuilder took 459.42ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 92.5MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 14:10:01,509 INFO L158 Benchmark]: TraceAbstraction took 872919.01ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 92.0MB in the beginning and 338.2MB in the end (delta: -246.2MB). Peak memory consumption was 225.3MB. Max. memory is 16.1GB. [2024-11-13 14:10:01,510 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.53ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.36ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 107.5MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.19ms. Allocated memory is still 142.6MB. Free memory was 107.5MB in the beginning and 106.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.71ms. Allocated memory is still 142.6MB. Free memory was 106.2MB in the beginning and 104.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 459.42ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 92.5MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 872919.01ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 92.0MB in the beginning and 338.2MB in the end (delta: -246.2MB). Peak memory consumption was 225.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd --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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:10:03,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:10:04,073 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 14:10:04,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:10:04,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:10:04,119 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:10:04,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:10:04,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:10:04,122 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:10:04,122 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:10:04,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:10:04,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:10:04,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:10:04,124 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:10:04,124 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:10:04,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:10:04,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 14:10:04,125 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:10:04,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:10:04,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:10:04,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:10:04,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:10:04,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:10:04,127 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd 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 -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2024-11-13 14:10:04,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:10:04,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:10:04,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:10:04,467 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:10:04,467 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:10:04,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-fpi/ifeqn4.c Unable to find full path for "g++" [2024-11-13 14:10:06,446 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:10:06,703 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:10:06,708 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c [2024-11-13 14:10:06,718 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/76906c437/5a5a15dbad5d4c12ac046b92bb1b800b/FLAG6be66ce67 [2024-11-13 14:10:06,741 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/data/76906c437/5a5a15dbad5d4c12ac046b92bb1b800b [2024-11-13 14:10:06,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:10:06,749 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:10:06,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:10:06,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:10:06,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:10:06,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:10:06" (1/1) ... [2024-11-13 14:10:06,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cbc137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:06, skipping insertion in model container [2024-11-13 14:10:06,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:10:06" (1/1) ... [2024-11-13 14:10:06,779 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:10:06,949 WARN L250 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_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2024-11-13 14:10:06,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:10:07,005 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:10:07,019 WARN L250 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_5e155ce5-a357-43ea-8d3b-85029d933900/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2024-11-13 14:10:07,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:10:07,062 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:10:07,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07 WrapperNode [2024-11-13 14:10:07,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:10:07,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:10:07,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:10:07,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:10:07,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,116 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2024-11-13 14:10:07,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:10:07,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:10:07,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:10:07,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:10:07,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,131 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,153 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 4 writes are split as follows [0, 2, 2]. [2024-11-13 14:10:07,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,181 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:10:07,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:10:07,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:10:07,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:10:07,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (1/1) ... [2024-11-13 14:10:07,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:10:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:07,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:10:07,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#0 [2024-11-13 14:10:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#1 [2024-11-13 14:10:07,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#2 [2024-11-13 14:10:07,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:10:07,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:10:07,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:10:07,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#0 [2024-11-13 14:10:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#1 [2024-11-13 14:10:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#2 [2024-11-13 14:10:07,367 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:10:07,369 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:10:07,777 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-13 14:10:07,777 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:10:07,792 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:10:07,792 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 14:10:07,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:10:07 BoogieIcfgContainer [2024-11-13 14:10:07,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:10:07,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:10:07,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:10:07,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:10:07,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:10:06" (1/3) ... [2024-11-13 14:10:07,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1695b399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:10:07, skipping insertion in model container [2024-11-13 14:10:07,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:10:07" (2/3) ... [2024-11-13 14:10:07,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1695b399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:10:07, skipping insertion in model container [2024-11-13 14:10:07,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:10:07" (3/3) ... [2024-11-13 14:10:07,808 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2024-11-13 14:10:07,825 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:10:07,827 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ifeqn4.c that has 1 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 14:10:07,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:10:07,910 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d793c1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:10:07,910 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 14:10:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) [2024-11-13 14:10:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:10:07,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:07,923 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:07,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:07,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2024-11-13 14:10:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:07,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308338979] [2024-11-13 14:10:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:07,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:07,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:10:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:08,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-13 14:10:08,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:08,130 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:10:08,131 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:10:08,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308338979] [2024-11-13 14:10:08,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308338979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:10:08,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:10:08,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:10:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528518284] [2024-11-13 14:10:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:10:08,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 14:10:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:10:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 14:10:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:10:08,159 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-13 14:10:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:08,171 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-11-13 14:10:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 14:10:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-13 14:10:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:08,179 INFO L225 Difference]: With dead ends: 40 [2024-11-13 14:10:08,179 INFO L226 Difference]: Without dead ends: 18 [2024-11-13 14:10:08,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:10:08,184 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:08,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 14:10:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-13 14:10:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-13 14:10:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2024-11-13 14:10:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-13 14:10:08,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2024-11-13 14:10:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:08,215 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-13 14:10:08,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-13 14:10:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-13 14:10:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 14:10:08,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:08,216 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:08,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:10:08,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:08,421 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:08,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2024-11-13 14:10:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:08,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144631997] [2024-11-13 14:10:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:08,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:08,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:08,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:10:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:08,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 14:10:08,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:08,642 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:10:08,642 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:10:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144631997] [2024-11-13 14:10:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144631997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:10:08,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:10:08,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:10:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461813656] [2024-11-13 14:10:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:10:08,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:10:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:10:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:10:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:10:08,645 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-13 14:10:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:08,937 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-11-13 14:10:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:10:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2024-11-13 14:10:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:08,945 INFO L225 Difference]: With dead ends: 42 [2024-11-13 14:10:08,945 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 14:10:08,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:10:08,946 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:08,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:10:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 14:10:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2024-11-13 14:10:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2024-11-13 14:10:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-13 14:10:08,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2024-11-13 14:10:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:08,956 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-13 14:10:08,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-13 14:10:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-13 14:10:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 14:10:08,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:08,957 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:08,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 14:10:09,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:09,158 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:09,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:09,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2024-11-13 14:10:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184339322] [2024-11-13 14:10:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:09,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:09,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:09,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:09,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:10:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:09,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 14:10:09,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:10:09,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2024-11-13 14:10:09,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:09,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2024-11-13 14:10:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:09,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:10:09,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:10:09,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184339322] [2024-11-13 14:10:09,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184339322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:10:09,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:10:09,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 14:10:09,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900281997] [2024-11-13 14:10:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:10:09,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:10:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:10:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:10:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:10:09,783 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2024-11-13 14:10:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:10,119 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-11-13 14:10:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:10:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2024-11-13 14:10:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:10,120 INFO L225 Difference]: With dead ends: 36 [2024-11-13 14:10:10,120 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 14:10:10,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:10:10,122 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:10,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:10:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 14:10:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-11-13 14:10:10,128 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) [2024-11-13 14:10:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-13 14:10:10,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2024-11-13 14:10:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:10,131 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-13 14:10:10,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2024-11-13 14:10:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-13 14:10:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 14:10:10,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:10,132 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:10,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:10:10,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:10,332 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:10,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:10,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1825280711, now seen corresponding path program 1 times [2024-11-13 14:10:10,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:10,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364463935] [2024-11-13 14:10:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:10,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:10,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:10,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:10:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:10,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 14:10:10,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:10,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:11,167 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:10:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364463935] [2024-11-13 14:10:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364463935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:11,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:10:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2024-11-13 14:10:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148287947] [2024-11-13 14:10:11,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:11,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:10:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:10:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:10:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:10:11,170 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2024-11-13 14:10:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:11,919 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-11-13 14:10:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:10:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-13 14:10:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:11,928 INFO L225 Difference]: With dead ends: 70 [2024-11-13 14:10:11,928 INFO L226 Difference]: Without dead ends: 40 [2024-11-13 14:10:11,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:10:11,930 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:11,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 60 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:10:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-13 14:10:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2024-11-13 14:10:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2024-11-13 14:10:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-13 14:10:11,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2024-11-13 14:10:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:11,937 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-13 14:10:11,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2024-11-13 14:10:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-13 14:10:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 14:10:11,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:11,938 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:11,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:10:12,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:12,143 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:12,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2024-11-13 14:10:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232666491] [2024-11-13 14:10:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:12,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:12,146 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:12,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:10:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:12,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 14:10:12,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:10:12,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2024-11-13 14:10:12,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:12,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2024-11-13 14:10:12,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:12,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-13 14:10:13,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:13,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 40 [2024-11-13 14:10:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:10:13,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:14,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:14,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 109 [2024-11-13 14:10:15,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-13 14:10:15,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:15,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24900 treesize of output 22020 [2024-11-13 14:10:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 14:10:15,841 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 14:10:15,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232666491] [2024-11-13 14:10:15,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232666491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:10:15,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:10:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-11-13 14:10:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702625983] [2024-11-13 14:10:15,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:10:15,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 14:10:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 14:10:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 14:10:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-13 14:10:15,843 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-11-13 14:10:21,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 14:10:26,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 14:10:27,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 14:10:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:10:28,801 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-13 14:10:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:10:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 24 [2024-11-13 14:10:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:10:28,803 INFO L225 Difference]: With dead ends: 84 [2024-11-13 14:10:28,803 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 14:10:28,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2024-11-13 14:10:28,804 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:10:28,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 98 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 207 Invalid, 2 Unknown, 0 Unchecked, 11.3s Time] [2024-11-13 14:10:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 14:10:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2024-11-13 14:10:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 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) [2024-11-13 14:10:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2024-11-13 14:10:28,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 24 [2024-11-13 14:10:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:10:28,823 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2024-11-13 14:10:28,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-11-13 14:10:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2024-11-13 14:10:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 14:10:28,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:10:28,823 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:10:28,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:10:29,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:29,024 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 14:10:29,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:10:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1537893212, now seen corresponding path program 1 times [2024-11-13 14:10:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 14:10:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991001342] [2024-11-13 14:10:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:10:29,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:10:29,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:10:29,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:10:29,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e155ce5-a357-43ea-8d3b-85029d933900/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:10:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:10:29,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 14:10:29,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:10:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:10:29,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2024-11-13 14:10:29,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:29,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2024-11-13 14:10:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:10:29,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2024-11-13 14:10:30,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:30,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 67 [2024-11-13 14:10:30,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:30,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 71 [2024-11-13 14:10:30,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:10:30,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 53 [2024-11-13 14:10:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:10:30,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:10:34,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 319 [2024-11-13 14:10:34,552 INFO L349 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2024-11-13 14:10:34,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55900 treesize of output 50738