./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1 --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 aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:49:12,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:49:12,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 07:49:12,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:49:12,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:49:12,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:49:12,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:49:12,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:49:12,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:49:12,640 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:49:12,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:49:12,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:49:12,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:49:12,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:49:12,640 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:49:12,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:49:12,641 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:49:12,642 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:49:12,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:49:12,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:49:12,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:49:12,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:49:12,643 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_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1 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 -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 [2024-12-02 07:49:12,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:49:12,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:49:12,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:49:12,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:49:12,879 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:49:12,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2024-12-02 07:49:15,470 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/data/f041eb798/a45d7bac83c140748a6304caa953d909/FLAGabc763c7b [2024-12-02 07:49:15,660 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:49:15,660 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2024-12-02 07:49:15,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/data/f041eb798/a45d7bac83c140748a6304caa953d909/FLAGabc763c7b [2024-12-02 07:49:16,046 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/data/f041eb798/a45d7bac83c140748a6304caa953d909 [2024-12-02 07:49:16,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:49:16,048 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:49:16,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:49:16,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:49:16,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:49:16,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6185ee34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16, skipping insertion in model container [2024-12-02 07:49:16,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,063 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:49:16,174 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_668b2925-ad9d-4c2f-b177-ca26b01a2300/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2024-12-02 07:49:16,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:49:16,204 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:49:16,212 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_668b2925-ad9d-4c2f-b177-ca26b01a2300/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2024-12-02 07:49:16,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:49:16,230 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:49:16,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16 WrapperNode [2024-12-02 07:49:16,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:49:16,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:49:16,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:49:16,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:49:16,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,253 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2024-12-02 07:49:16,253 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:49:16,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:49:16,254 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:49:16,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:49:16,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,261 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,270 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-12-02 07:49:16,270 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,275 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:49:16,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:49:16,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:49:16,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:49:16,282 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (1/1) ... [2024-12-02 07:49:16,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:49:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:16,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:49:16,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:49:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:49:16,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:49:16,390 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:49:16,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:49:16,558 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-12-02 07:49:16,559 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:49:16,567 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:49:16,567 INFO L312 CfgBuilder]: Removed 9 assume(true) statements. [2024-12-02 07:49:16,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:49:16 BoogieIcfgContainer [2024-12-02 07:49:16,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:49:16,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:49:16,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:49:16,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:49:16,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:49:16" (1/3) ... [2024-12-02 07:49:16,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603a05a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:49:16, skipping insertion in model container [2024-12-02 07:49:16,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:49:16" (2/3) ... [2024-12-02 07:49:16,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603a05a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:49:16, skipping insertion in model container [2024-12-02 07:49:16,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:49:16" (3/3) ... [2024-12-02 07:49:16,574 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2024-12-02 07:49:16,585 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:49:16,587 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum_const_m4.c that has 1 procedures, 38 locations, 1 initial locations, 9 loop locations, and 1 error locations. [2024-12-02 07:49:16,629 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:49:16,639 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;@4675a938, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:49:16,639 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 07:49:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) [2024-12-02 07:49:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 07:49:16,646 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:16,647 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:16,647 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:16,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:16,651 INFO L85 PathProgramCache]: Analyzing trace with hash -342530002, now seen corresponding path program 1 times [2024-12-02 07:49:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:16,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004966513] [2024-12-02 07:49:16,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:49:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:49:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:49:16,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004966513] [2024-12-02 07:49:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004966513] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:49:16,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:49:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:49:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204917389] [2024-12-02 07:49:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:49:16,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 07:49:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:16,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 07:49:16,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 07:49:16,790 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 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) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:16,804 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2024-12-02 07:49:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 07:49:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-12-02 07:49:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:16,809 INFO L225 Difference]: With dead ends: 71 [2024-12-02 07:49:16,809 INFO L226 Difference]: Without dead ends: 33 [2024-12-02 07:49:16,812 INFO L434 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 [2024-12-02 07:49:16,814 INFO L435 NwaCegarLoop]: 47 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, 47 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 [2024-12-02 07:49:16,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:49:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-12-02 07:49:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-12-02 07:49:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-12-02 07:49:16,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2024-12-02 07:49:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:16,839 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-12-02 07:49:16,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-12-02 07:49:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 07:49:16,840 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:16,840 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:16,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:49:16,841 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:16,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1178131130, now seen corresponding path program 1 times [2024-12-02 07:49:16,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:16,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971174637] [2024-12-02 07:49:16,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:49:16,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:49:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:49:16,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:16,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971174637] [2024-12-02 07:49:16,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971174637] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:49:16,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:49:16,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:49:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835034739] [2024-12-02 07:49:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:49:16,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:49:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:16,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:49:16,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:49:16,962 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:17,044 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2024-12-02 07:49:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:49:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-12-02 07:49:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:17,046 INFO L225 Difference]: With dead ends: 63 [2024-12-02 07:49:17,046 INFO L226 Difference]: Without dead ends: 35 [2024-12-02 07:49:17,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:49:17,047 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:17,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:49:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-12-02 07:49:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-12-02 07:49:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-12-02 07:49:17,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2024-12-02 07:49:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:17,052 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-12-02 07:49:17,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-12-02 07:49:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 07:49:17,053 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:17,053 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:17,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:49:17,053 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:17,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -273096290, now seen corresponding path program 1 times [2024-12-02 07:49:17,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:17,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855272588] [2024-12-02 07:49:17,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:49:17,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:49:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:49:17,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:17,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855272588] [2024-12-02 07:49:17,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855272588] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:49:17,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:49:17,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:49:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296713008] [2024-12-02 07:49:17,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:49:17,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:49:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:17,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:49:17,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:49:17,161 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:17,271 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2024-12-02 07:49:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:49:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 07:49:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:17,273 INFO L225 Difference]: With dead ends: 76 [2024-12-02 07:49:17,273 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 07:49:17,273 INFO L434 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 [2024-12-02 07:49:17,274 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:17,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:49:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 07:49:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2024-12-02 07:49:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-12-02 07:49:17,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2024-12-02 07:49:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:17,281 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-12-02 07:49:17,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-12-02 07:49:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-12-02 07:49:17,282 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:17,282 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:17,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:49:17,282 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:17,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1295375938, now seen corresponding path program 1 times [2024-12-02 07:49:17,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:17,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987028604] [2024-12-02 07:49:17,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:49:17,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:49:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:49:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987028604] [2024-12-02 07:49:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987028604] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783897492] [2024-12-02 07:49:17,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:49:17,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:17,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:17,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:49:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:49:17,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 07:49:17,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:49:17,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:49:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:49:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783897492] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:49:17,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:49:17,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-12-02 07:49:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335990416] [2024-12-02 07:49:17,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:49:17,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:49:17,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:17,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:49:17,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:49:17,570 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:17,684 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2024-12-02 07:49:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:49:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-12-02 07:49:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:17,685 INFO L225 Difference]: With dead ends: 81 [2024-12-02 07:49:17,685 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 07:49:17,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:49:17,686 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:17,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:49:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 07:49:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-12-02 07:49:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-12-02 07:49:17,692 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2024-12-02 07:49:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:17,692 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-12-02 07:49:17,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-12-02 07:49:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 07:49:17,693 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:17,694 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:17,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:49:17,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:17,894 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:17,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 643020706, now seen corresponding path program 2 times [2024-12-02 07:49:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266100383] [2024-12-02 07:49:17,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:49:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:17,918 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:49:17,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 07:49:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266100383] [2024-12-02 07:49:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266100383] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120313781] [2024-12-02 07:49:18,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:49:18,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:18,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:18,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:49:18,076 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:49:18,076 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:18,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 07:49:18,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 07:49:18,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:49:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-12-02 07:49:18,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120313781] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:49:18,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:49:18,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-12-02 07:49:18,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541396088] [2024-12-02 07:49:18,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:49:18,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:49:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:18,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:49:18,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:49:18,267 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:18,426 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2024-12-02 07:49:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:49:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 43 [2024-12-02 07:49:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:18,427 INFO L225 Difference]: With dead ends: 101 [2024-12-02 07:49:18,427 INFO L226 Difference]: Without dead ends: 69 [2024-12-02 07:49:18,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:49:18,428 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:18,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:49:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-12-02 07:49:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2024-12-02 07:49:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2024-12-02 07:49:18,436 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2024-12-02 07:49:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:18,436 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2024-12-02 07:49:18,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2024-12-02 07:49:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-12-02 07:49:18,437 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:18,437 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:18,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:49:18,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:18,638 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:18,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2083434434, now seen corresponding path program 3 times [2024-12-02 07:49:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:18,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505907425] [2024-12-02 07:49:18,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:49:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:18,736 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 07:49:18,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:49:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505907425] [2024-12-02 07:49:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505907425] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262021935] [2024-12-02 07:49:23,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:49:23,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:23,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:23,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:49:23,626 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 07:49:23,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:23,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-12-02 07:49:23,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:49:25,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:49:27,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:49:27,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 37 treesize of output 53 [2024-12-02 07:49:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:49:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262021935] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:49:28,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:49:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 25, 27] total 83 [2024-12-02 07:49:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527491227] [2024-12-02 07:49:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:49:28,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-12-02 07:49:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:28,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-12-02 07:49:28,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=6335, Unknown=0, NotChecked=0, Total=6806 [2024-12-02 07:49:28,249 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:32,683 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2024-12-02 07:49:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 07:49:32,684 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-12-02 07:49:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:32,685 INFO L225 Difference]: With dead ends: 116 [2024-12-02 07:49:32,685 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 07:49:32,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3448 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=913, Invalid=11519, Unknown=0, NotChecked=0, Total=12432 [2024-12-02 07:49:32,687 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:32,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 226 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 07:49:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 07:49:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2024-12-02 07:49:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2024-12-02 07:49:32,699 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2024-12-02 07:49:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:32,699 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2024-12-02 07:49:32,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2024-12-02 07:49:32,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-12-02 07:49:32,700 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:32,700 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:32,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:49:32,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 07:49:32,901 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:32,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 148127206, now seen corresponding path program 4 times [2024-12-02 07:49:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:32,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713486250] [2024-12-02 07:49:32,902 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:49:32,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:32,917 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:49:32,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:32,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:32,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713486250] [2024-12-02 07:49:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713486250] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:32,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908173627] [2024-12-02 07:49:32,988 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:49:32,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:32,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:32,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:32,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:49:33,046 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:49:33,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:33,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:49:33,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:33,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:49:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:33,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908173627] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:49:33,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:49:33,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-12-02 07:49:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420115893] [2024-12-02 07:49:33,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:49:33,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:49:33,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:33,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:49:33,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:49:33,154 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:33,528 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2024-12-02 07:49:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 07:49:33,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-12-02 07:49:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:33,529 INFO L225 Difference]: With dead ends: 215 [2024-12-02 07:49:33,529 INFO L226 Difference]: Without dead ends: 134 [2024-12-02 07:49:33,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:49:33,530 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:33,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:49:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-12-02 07:49:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2024-12-02 07:49:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1403508771929824) internal successors, (130), 114 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2024-12-02 07:49:33,547 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 61 [2024-12-02 07:49:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:33,547 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2024-12-02 07:49:33,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2024-12-02 07:49:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-12-02 07:49:33,548 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:33,548 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:33,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:49:33,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:33,749 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:33,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 664510118, now seen corresponding path program 5 times [2024-12-02 07:49:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014696276] [2024-12-02 07:49:33,749 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:49:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:33,768 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 07:49:33,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014696276] [2024-12-02 07:49:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014696276] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671233033] [2024-12-02 07:49:33,857 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:49:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:33,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:33,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:49:33,929 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 07:49:33,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:33,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:49:33,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:34,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:49:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:49:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671233033] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:49:34,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:49:34,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-12-02 07:49:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729312957] [2024-12-02 07:49:34,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:49:34,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:49:34,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:49:34,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:49:34,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:49:34,053 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:49:34,288 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2024-12-02 07:49:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:49:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-12-02 07:49:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:49:34,289 INFO L225 Difference]: With dead ends: 197 [2024-12-02 07:49:34,289 INFO L226 Difference]: Without dead ends: 87 [2024-12-02 07:49:34,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:49:34,290 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:49:34,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 37 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:49:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-12-02 07:49:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-12-02 07:49:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2024-12-02 07:49:34,300 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 61 [2024-12-02 07:49:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:49:34,300 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2024-12-02 07:49:34,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:49:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2024-12-02 07:49:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-12-02 07:49:34,301 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:49:34,301 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:49:34,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:49:34,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:34,502 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:49:34,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:49:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1955775686, now seen corresponding path program 6 times [2024-12-02 07:49:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:49:34,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346548208] [2024-12-02 07:49:34,502 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:49:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:49:34,604 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-12-02 07:49:34,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:49:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:49:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346548208] [2024-12-02 07:49:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346548208] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:49:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204561660] [2024-12-02 07:49:39,455 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:49:39,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:49:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:49:39,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:49:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:49:39,534 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-12-02 07:49:39,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:49:39,536 WARN L254 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-12-02 07:49:39,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:49:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:49:43,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:50:33,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:50:33,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 127 [2024-12-02 07:50:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:50:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204561660] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:50:36,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:50:36,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 40, 40] total 115 [2024-12-02 07:50:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624874009] [2024-12-02 07:50:36,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:50:36,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2024-12-02 07:50:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:50:36,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2024-12-02 07:50:36,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=12475, Unknown=6, NotChecked=0, Total=13110 [2024-12-02 07:50:36,026 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 115 states, 115 states have (on average 1.9130434782608696) internal successors, (220), 115 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:50:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:50:59,446 INFO L93 Difference]: Finished difference Result 288 states and 328 transitions. [2024-12-02 07:50:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-12-02 07:50:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9130434782608696) internal successors, (220), 115 states have internal predecessors, (220), 0 states have call successors, (0), 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 77 [2024-12-02 07:50:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:50:59,447 INFO L225 Difference]: With dead ends: 288 [2024-12-02 07:50:59,447 INFO L226 Difference]: Without dead ends: 230 [2024-12-02 07:50:59,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8250 ImplicationChecksByTransitivity, 70.6s TimeCoverageRelationStatistics Valid=2332, Invalid=30604, Unknown=6, NotChecked=0, Total=32942 [2024-12-02 07:50:59,452 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 1790 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 7818 mSolverCounterSat, 1856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 9674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1856 IncrementalHoareTripleChecker+Valid, 7818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:50:59,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1790 Valid, 463 Invalid, 9674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1856 Valid, 7818 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-12-02 07:50:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-12-02 07:50:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 172. [2024-12-02 07:50:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 171 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:50:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 191 transitions. [2024-12-02 07:50:59,481 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 191 transitions. Word has length 77 [2024-12-02 07:50:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:50:59,481 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 191 transitions. [2024-12-02 07:50:59,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9130434782608696) internal successors, (220), 115 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:50:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 191 transitions. [2024-12-02 07:50:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-12-02 07:50:59,483 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:50:59,483 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:50:59,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-12-02 07:50:59,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:50:59,683 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:50:59,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:50:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash 307518890, now seen corresponding path program 7 times [2024-12-02 07:50:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:50:59,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835636480] [2024-12-02 07:50:59,684 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:50:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:50:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:50:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-12-02 07:50:59,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:50:59,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835636480] [2024-12-02 07:50:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835636480] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:50:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935435733] [2024-12-02 07:50:59,783 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:50:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:50:59,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:50:59,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:50:59,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:50:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:50:59,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 07:50:59,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:50:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-12-02 07:50:59,972 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-12-02 07:51:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935435733] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:00,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:00,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-12-02 07:51:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384975778] [2024-12-02 07:51:00,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:00,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 07:51:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:00,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 07:51:00,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-12-02 07:51:00,057 INFO L87 Difference]: Start difference. First operand 172 states and 191 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:00,384 INFO L93 Difference]: Finished difference Result 315 states and 352 transitions. [2024-12-02 07:51:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:51:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 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 79 [2024-12-02 07:51:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:00,385 INFO L225 Difference]: With dead ends: 315 [2024-12-02 07:51:00,385 INFO L226 Difference]: Without dead ends: 105 [2024-12-02 07:51:00,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:51:00,387 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:00,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 46 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:51:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-12-02 07:51:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2024-12-02 07:51:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2024-12-02 07:51:00,400 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 79 [2024-12-02 07:51:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:00,400 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2024-12-02 07:51:00,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2024-12-02 07:51:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-12-02 07:51:00,401 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:00,401 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:00,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:51:00,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:00,602 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:00,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1886215990, now seen corresponding path program 8 times [2024-12-02 07:51:00,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324414764] [2024-12-02 07:51:00,602 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:51:00,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:00,633 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:51:00,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:51:05,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324414764] [2024-12-02 07:51:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324414764] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:05,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056917945] [2024-12-02 07:51:05,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:51:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:05,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:05,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:05,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:51:05,775 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:51:05,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:05,777 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-12-02 07:51:05,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:05,817 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 [2024-12-02 07:51:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:51:07,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 07:51:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056917945] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:11,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 42, 40] total 108 [2024-12-02 07:51:11,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484110650] [2024-12-02 07:51:11,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:11,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-12-02 07:51:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:11,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-12-02 07:51:11,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=11113, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 07:51:11,596 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 108 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:18,670 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2024-12-02 07:51:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-12-02 07:51:18,671 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 108 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2024-12-02 07:51:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:18,671 INFO L225 Difference]: With dead ends: 181 [2024-12-02 07:51:18,671 INFO L226 Difference]: Without dead ends: 177 [2024-12-02 07:51:18,673 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5261 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=816, Invalid=18924, Unknown=0, NotChecked=0, Total=19740 [2024-12-02 07:51:18,673 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 7570 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 7729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 7570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:18,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 323 Invalid, 7729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 7570 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-12-02 07:51:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-12-02 07:51:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2024-12-02 07:51:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2024-12-02 07:51:18,694 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 95 [2024-12-02 07:51:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:18,694 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2024-12-02 07:51:18,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 108 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2024-12-02 07:51:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 07:51:18,695 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:18,695 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:18,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:51:18,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:18,896 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:18,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1663464210, now seen corresponding path program 9 times [2024-12-02 07:51:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:18,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319800222] [2024-12-02 07:51:18,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:51:18,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:18,936 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:51:18,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319800222] [2024-12-02 07:51:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319800222] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242277900] [2024-12-02 07:51:19,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:51:19,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:19,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:19,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:51:19,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:51:19,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:19,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 07:51:19,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:19,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:19,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242277900] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:19,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:19,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-12-02 07:51:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340429081] [2024-12-02 07:51:19,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:19,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 07:51:19,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:19,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 07:51:19,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:51:19,448 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:20,197 INFO L93 Difference]: Finished difference Result 331 states and 367 transitions. [2024-12-02 07:51:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 07:51:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-12-02 07:51:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:20,198 INFO L225 Difference]: With dead ends: 331 [2024-12-02 07:51:20,198 INFO L226 Difference]: Without dead ends: 202 [2024-12-02 07:51:20,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-12-02 07:51:20,199 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:20,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 54 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 07:51:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-12-02 07:51:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2024-12-02 07:51:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0919540229885059) internal successors, (190), 174 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2024-12-02 07:51:20,227 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 97 [2024-12-02 07:51:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:20,227 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2024-12-02 07:51:20,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2024-12-02 07:51:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 07:51:20,228 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:20,228 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:20,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:51:20,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 07:51:20,429 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:20,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -238588498, now seen corresponding path program 10 times [2024-12-02 07:51:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241676389] [2024-12-02 07:51:20,429 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:51:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:20,441 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:51:20,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:20,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:20,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241676389] [2024-12-02 07:51:20,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241676389] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:20,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509978698] [2024-12-02 07:51:20,585 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:51:20,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:20,587 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:20,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:51:20,661 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:51:20,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:20,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 07:51:20,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:20,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-12-02 07:51:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509978698] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:20,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:20,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-12-02 07:51:20,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458446483] [2024-12-02 07:51:20,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:20,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:51:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:20,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:51:20,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:51:20,963 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:21,368 INFO L93 Difference]: Finished difference Result 293 states and 316 transitions. [2024-12-02 07:51:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:51:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-12-02 07:51:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:21,369 INFO L225 Difference]: With dead ends: 293 [2024-12-02 07:51:21,369 INFO L226 Difference]: Without dead ends: 123 [2024-12-02 07:51:21,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2024-12-02 07:51:21,370 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 199 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:21,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 43 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:51:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-12-02 07:51:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2024-12-02 07:51:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2024-12-02 07:51:21,384 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 97 [2024-12-02 07:51:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:21,385 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2024-12-02 07:51:21,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2024-12-02 07:51:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 07:51:21,385 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:21,385 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:21,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 07:51:21,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 07:51:21,586 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:21,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1715110862, now seen corresponding path program 11 times [2024-12-02 07:51:21,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:21,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633281555] [2024-12-02 07:51:21,586 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:51:21,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:21,706 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 07:51:21,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:51:29,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:29,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633281555] [2024-12-02 07:51:29,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633281555] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:29,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745054067] [2024-12-02 07:51:29,386 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:51:29,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:29,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:29,387 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:51:29,936 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 07:51:29,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:29,940 WARN L254 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-12-02 07:51:29,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:30,313 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 [2024-12-02 07:51:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:51:35,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 07:51:43,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745054067] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:43,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 51, 48] total 146 [2024-12-02 07:51:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408252589] [2024-12-02 07:51:43,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:43,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-12-02 07:51:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:43,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-12-02 07:51:43,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=20732, Unknown=0, NotChecked=0, Total=21170 [2024-12-02 07:51:43,743 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 146 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:55,612 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2024-12-02 07:51:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-12-02 07:51:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 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 113 [2024-12-02 07:51:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:55,614 INFO L225 Difference]: With dead ends: 213 [2024-12-02 07:51:55,614 INFO L226 Difference]: Without dead ends: 209 [2024-12-02 07:51:55,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5766 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=748, Invalid=37082, Unknown=0, NotChecked=0, Total=37830 [2024-12-02 07:51:55,617 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 9473 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 9478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:55,617 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 516 Invalid, 9478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9473 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-12-02 07:51:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-12-02 07:51:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2024-12-02 07:51:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0842105263157895) internal successors, (206), 190 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 206 transitions. [2024-12-02 07:51:55,666 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 206 transitions. Word has length 113 [2024-12-02 07:51:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:55,666 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 206 transitions. [2024-12-02 07:51:55,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.1575342465753424) internal successors, (315), 146 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 206 transitions. [2024-12-02 07:51:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-12-02 07:51:55,667 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:55,667 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:55,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:51:55,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 07:51:55,868 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:55,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2073657074, now seen corresponding path program 12 times [2024-12-02 07:51:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821386254] [2024-12-02 07:51:55,868 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:51:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:55,903 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 07:51:55,903 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:56,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:56,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821386254] [2024-12-02 07:51:56,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821386254] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:56,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117904402] [2024-12-02 07:51:56,072 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:51:56,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:56,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:56,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:51:56,178 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 07:51:56,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:51:56,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 07:51:56,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:56,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117904402] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:56,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-12-02 07:51:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114133140] [2024-12-02 07:51:56,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:56,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:51:56,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:56,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:51:56,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-12-02 07:51:56,527 INFO L87 Difference]: Start difference. First operand 191 states and 206 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:57,467 INFO L93 Difference]: Finished difference Result 389 states and 425 transitions. [2024-12-02 07:51:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:51:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 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 115 [2024-12-02 07:51:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:57,469 INFO L225 Difference]: With dead ends: 389 [2024-12-02 07:51:57,469 INFO L226 Difference]: Without dead ends: 236 [2024-12-02 07:51:57,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 216 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:51:57,470 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:57,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 62 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1823 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:51:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-12-02 07:51:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 205. [2024-12-02 07:51:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0784313725490196) internal successors, (220), 204 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 220 transitions. [2024-12-02 07:51:57,497 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 220 transitions. Word has length 115 [2024-12-02 07:51:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:57,497 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 220 transitions. [2024-12-02 07:51:57,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 220 transitions. [2024-12-02 07:51:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-12-02 07:51:57,498 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:57,498 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:57,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 07:51:57,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 07:51:57,698 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:57,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1107124302, now seen corresponding path program 13 times [2024-12-02 07:51:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:57,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468522134] [2024-12-02 07:51:57,699 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:51:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:51:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:57,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:51:57,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468522134] [2024-12-02 07:51:57,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468522134] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:51:57,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149617156] [2024-12-02 07:51:57,882 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:51:57,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:51:57,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:51:57,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:51:57,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:51:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:51:57,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 07:51:57,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:51:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:58,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:51:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-12-02 07:51:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149617156] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:51:58,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:51:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-12-02 07:51:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509485554] [2024-12-02 07:51:58,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:51:58,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:51:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:51:58,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:51:58,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-12-02 07:51:58,351 INFO L87 Difference]: Start difference. First operand 205 states and 220 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:51:58,858 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2024-12-02 07:51:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:51:58,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 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 115 [2024-12-02 07:51:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:51:58,859 INFO L225 Difference]: With dead ends: 341 [2024-12-02 07:51:58,859 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 07:51:58,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 211 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-12-02 07:51:58,860 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:51:58,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 42 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:51:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 07:51:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2024-12-02 07:51:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2024-12-02 07:51:58,880 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 115 [2024-12-02 07:51:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:51:58,880 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2024-12-02 07:51:58,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:51:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2024-12-02 07:51:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-12-02 07:51:58,881 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:51:58,881 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:51:58,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:51:59,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 07:51:59,081 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:51:59,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:51:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1157190190, now seen corresponding path program 14 times [2024-12-02 07:51:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:51:59,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165223991] [2024-12-02 07:51:59,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:51:59,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:51:59,125 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:51:59,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:52:08,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:52:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165223991] [2024-12-02 07:52:08,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165223991] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:52:08,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621787176] [2024-12-02 07:52:08,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:52:08,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:52:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:52:08,620 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:52:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:52:08,713 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:52:08,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:08,717 WARN L254 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-12-02 07:52:08,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:52:08,775 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 [2024-12-02 07:52:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:52:12,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:52:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 07:52:21,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621787176] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:52:21,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:52:21,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 60, 56] total 153 [2024-12-02 07:52:21,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923723387] [2024-12-02 07:52:21,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:52:21,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2024-12-02 07:52:21,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:52:21,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2024-12-02 07:52:21,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=22615, Unknown=0, NotChecked=0, Total=23256 [2024-12-02 07:52:21,250 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 153 states, 153 states have (on average 2.084967320261438) internal successors, (319), 153 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:52:50,393 INFO L93 Difference]: Finished difference Result 508 states and 559 transitions. [2024-12-02 07:52:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-12-02 07:52:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.084967320261438) internal successors, (319), 153 states have internal predecessors, (319), 0 states have call successors, (0), 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 131 [2024-12-02 07:52:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:52:50,397 INFO L225 Difference]: With dead ends: 508 [2024-12-02 07:52:50,397 INFO L226 Difference]: Without dead ends: 403 [2024-12-02 07:52:50,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13681 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=2566, Invalid=53840, Unknown=0, NotChecked=0, Total=56406 [2024-12-02 07:52:50,400 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 972 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 19730 mSolverCounterSat, 1150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 20880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1150 IncrementalHoareTripleChecker+Valid, 19730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:52:50,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 392 Invalid, 20880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1150 Valid, 19730 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2024-12-02 07:52:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-12-02 07:52:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 359. [2024-12-02 07:52:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.106145251396648) internal successors, (396), 358 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 396 transitions. [2024-12-02 07:52:50,478 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 396 transitions. Word has length 131 [2024-12-02 07:52:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:52:50,478 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 396 transitions. [2024-12-02 07:52:50,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.084967320261438) internal successors, (319), 153 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 396 transitions. [2024-12-02 07:52:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-12-02 07:52:50,479 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:52:50,480 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:52:50,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:52:50,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 07:52:50,680 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:52:50,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:52:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1436034442, now seen corresponding path program 15 times [2024-12-02 07:52:50,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:52:50,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049752491] [2024-12-02 07:52:50,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:52:50,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:52:50,746 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-12-02 07:52:50,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-12-02 07:52:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:52:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049752491] [2024-12-02 07:52:51,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049752491] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:52:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169874027] [2024-12-02 07:52:51,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:52:51,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:52:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:52:51,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:52:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:52:51,128 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-12-02 07:52:51,128 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:51,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:52:51,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:52:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-12-02 07:52:51,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:52:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-12-02 07:52:51,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169874027] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:52:51,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:52:51,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-12-02 07:52:51,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655487926] [2024-12-02 07:52:51,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:52:51,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 07:52:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:52:51,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 07:52:51,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-12-02 07:52:51,394 INFO L87 Difference]: Start difference. First operand 359 states and 396 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:52:52,530 INFO L93 Difference]: Finished difference Result 687 states and 760 transitions. [2024-12-02 07:52:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 07:52:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 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 133 [2024-12-02 07:52:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:52:52,531 INFO L225 Difference]: With dead ends: 687 [2024-12-02 07:52:52,531 INFO L226 Difference]: Without dead ends: 410 [2024-12-02 07:52:52,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 257 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 07:52:52,532 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 235 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:52:52,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 58 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 07:52:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-12-02 07:52:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 360. [2024-12-02 07:52:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.0863509749303621) internal successors, (390), 359 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 390 transitions. [2024-12-02 07:52:52,594 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 390 transitions. Word has length 133 [2024-12-02 07:52:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:52:52,594 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 390 transitions. [2024-12-02 07:52:52,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 390 transitions. [2024-12-02 07:52:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 07:52:52,595 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:52:52,595 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:52:52,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:52:52,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 07:52:52,795 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:52:52,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:52:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2137370970, now seen corresponding path program 16 times [2024-12-02 07:52:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:52:52,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411485131] [2024-12-02 07:52:52,796 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:52:52,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:52:52,810 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:52:52,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-12-02 07:52:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:52:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411485131] [2024-12-02 07:52:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411485131] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:52:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069178393] [2024-12-02 07:52:52,987 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:52:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:52:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:52:52,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:52:52,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:52:53,075 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:52:53,076 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:52:53,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:52:53,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:52:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-12-02 07:52:53,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:52:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-12-02 07:52:53,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069178393] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:52:53,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:52:53,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-12-02 07:52:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341869437] [2024-12-02 07:52:53,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:52:53,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 07:52:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:52:53,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 07:52:53,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-12-02 07:52:53,466 INFO L87 Difference]: Start difference. First operand 360 states and 390 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:52:54,067 INFO L93 Difference]: Finished difference Result 514 states and 552 transitions. [2024-12-02 07:52:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 07:52:54,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 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 135 [2024-12-02 07:52:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:52:54,069 INFO L225 Difference]: With dead ends: 514 [2024-12-02 07:52:54,069 INFO L226 Difference]: Without dead ends: 159 [2024-12-02 07:52:54,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2024-12-02 07:52:54,070 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 276 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:52:54,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 44 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:52:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-12-02 07:52:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 150. [2024-12-02 07:52:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 149 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 158 transitions. [2024-12-02 07:52:54,097 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 158 transitions. Word has length 135 [2024-12-02 07:52:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:52:54,097 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 158 transitions. [2024-12-02 07:52:54,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:52:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 158 transitions. [2024-12-02 07:52:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-12-02 07:52:54,097 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:52:54,098 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:52:54,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 07:52:54,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:52:54,298 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:52:54,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:52:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -35430698, now seen corresponding path program 17 times [2024-12-02 07:52:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:52:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806730580] [2024-12-02 07:52:54,298 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:52:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:52:54,408 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 07:52:54,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:53:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:53:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:53:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806730580] [2024-12-02 07:53:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806730580] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:53:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916414177] [2024-12-02 07:53:09,840 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:53:09,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:53:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:53:09,841 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:53:09,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:53:13,501 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 07:53:13,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:53:13,510 WARN L254 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-12-02 07:53:13,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:53:13,613 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 [2024-12-02 07:53:13,718 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 [2024-12-02 07:53:13,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:53:13,829 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 [2024-12-02 07:53:13,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:53:13,962 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 33 treesize of output 38 [2024-12-02 07:53:14,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:53:14,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-12-02 07:53:14,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:53:14,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-12-02 07:53:14,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:53:14,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-12-02 07:53:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:53:25,536 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:53:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-12-02 07:53:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916414177] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:53:40,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:53:40,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 69, 64] total 201 [2024-12-02 07:53:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339525496] [2024-12-02 07:53:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:53:40,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2024-12-02 07:53:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:53:40,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2024-12-02 07:53:40,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=39484, Unknown=0, NotChecked=0, Total=40200 [2024-12-02 07:53:40,576 INFO L87 Difference]: Start difference. First operand 150 states and 158 transitions. Second operand has 201 states, 201 states have (on average 2.1144278606965172) internal successors, (425), 201 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:53:50,695 INFO L93 Difference]: Finished difference Result 277 states and 292 transitions. [2024-12-02 07:53:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-12-02 07:53:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.1144278606965172) internal successors, (425), 201 states have internal predecessors, (425), 0 states have call successors, (0), 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 149 [2024-12-02 07:53:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:53:50,697 INFO L225 Difference]: With dead ends: 277 [2024-12-02 07:53:50,697 INFO L226 Difference]: Without dead ends: 273 [2024-12-02 07:53:50,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11005 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=716, Invalid=39484, Unknown=0, NotChecked=0, Total=40200 [2024-12-02 07:53:50,698 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 16820 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 16824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:53:50,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 601 Invalid, 16824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16820 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2024-12-02 07:53:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-12-02 07:53:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 251. [2024-12-02 07:53:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.064) internal successors, (266), 250 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 266 transitions. [2024-12-02 07:53:50,744 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 266 transitions. Word has length 149 [2024-12-02 07:53:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:53:50,744 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 266 transitions. [2024-12-02 07:53:50,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.1144278606965172) internal successors, (425), 201 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 266 transitions. [2024-12-02 07:53:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-12-02 07:53:50,745 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:53:50,745 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:53:50,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 07:53:50,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:53:50,946 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:53:50,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:53:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1555118074, now seen corresponding path program 18 times [2024-12-02 07:53:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:53:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982519270] [2024-12-02 07:53:50,946 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:53:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:53:51,006 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-12-02 07:53:51,006 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:53:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2024-12-02 07:53:51,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:53:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982519270] [2024-12-02 07:53:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982519270] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:53:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401701453] [2024-12-02 07:53:51,238 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:53:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:53:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:53:51,239 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:53:51,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 07:53:51,424 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-12-02 07:53:51,424 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:53:51,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 07:53:51,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:53:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2024-12-02 07:53:51,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:53:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2024-12-02 07:53:51,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401701453] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:53:51,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:53:51,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-12-02 07:53:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282849369] [2024-12-02 07:53:51,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:53:51,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 07:53:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:53:51,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 07:53:51,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-12-02 07:53:51,751 INFO L87 Difference]: Start difference. First operand 251 states and 266 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:53:52,482 INFO L93 Difference]: Finished difference Result 523 states and 559 transitions. [2024-12-02 07:53:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 07:53:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-12-02 07:53:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:53:52,483 INFO L225 Difference]: With dead ends: 523 [2024-12-02 07:53:52,483 INFO L226 Difference]: Without dead ends: 277 [2024-12-02 07:53:52,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 277 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:53:52,484 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 493 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:53:52,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 49 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:53:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-12-02 07:53:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 262. [2024-12-02 07:53:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0574712643678161) internal successors, (276), 261 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 276 transitions. [2024-12-02 07:53:52,534 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 276 transitions. Word has length 151 [2024-12-02 07:53:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:53:52,534 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 276 transitions. [2024-12-02 07:53:52,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 276 transitions. [2024-12-02 07:53:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-12-02 07:53:52,535 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:53:52,535 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:53:52,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 07:53:52,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 07:53:52,735 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:53:52,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:53:52,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1440677598, now seen corresponding path program 19 times [2024-12-02 07:53:52,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:53:52,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645454114] [2024-12-02 07:53:52,736 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:53:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:53:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:53:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2024-12-02 07:53:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:53:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645454114] [2024-12-02 07:53:52,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645454114] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:53:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989917778] [2024-12-02 07:53:52,978 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:53:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:53:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:53:52,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:53:52,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 07:53:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:53:53,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 07:53:53,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:53:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2024-12-02 07:53:53,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:53:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2024-12-02 07:53:53,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989917778] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:53:53,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:53:53,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-12-02 07:53:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438722736] [2024-12-02 07:53:53,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:53:53,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 07:53:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:53:53,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 07:53:53,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-12-02 07:53:53,450 INFO L87 Difference]: Start difference. First operand 262 states and 276 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:53:54,181 INFO L93 Difference]: Finished difference Result 276 states and 290 transitions. [2024-12-02 07:53:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 07:53:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2024-12-02 07:53:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:53:54,182 INFO L225 Difference]: With dead ends: 276 [2024-12-02 07:53:54,182 INFO L226 Difference]: Without dead ends: 176 [2024-12-02 07:53:54,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 280 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 07:53:54,184 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 494 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:53:54,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 36 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:53:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-12-02 07:53:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 168. [2024-12-02 07:53:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0538922155688624) internal successors, (176), 167 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2024-12-02 07:53:54,213 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 153 [2024-12-02 07:53:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:53:54,213 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2024-12-02 07:53:54,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:53:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2024-12-02 07:53:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-12-02 07:53:54,213 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:53:54,213 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:53:54,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 07:53:54,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 07:53:54,414 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:53:54,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:53:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash -802367782, now seen corresponding path program 20 times [2024-12-02 07:53:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:53:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482549898] [2024-12-02 07:53:54,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:53:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:53:54,469 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:53:54,469 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:54:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:54:10,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:54:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482549898] [2024-12-02 07:54:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482549898] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:54:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313384683] [2024-12-02 07:54:10,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:54:10,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:54:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:54:10,277 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:54:10,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 07:54:10,388 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:54:10,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:54:10,393 WARN L254 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 284 conjuncts are in the unsatisfiable core [2024-12-02 07:54:10,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:54:10,473 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 [2024-12-02 07:54:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:54:16,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:54:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-12-02 07:54:34,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313384683] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:54:34,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:54:34,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 78, 72] total 197 [2024-12-02 07:54:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847959087] [2024-12-02 07:54:34,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:54:34,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-12-02 07:54:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:54:34,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-12-02 07:54:34,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=37716, Unknown=0, NotChecked=0, Total=38612 [2024-12-02 07:54:34,958 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 197 states, 197 states have (on average 2.0862944162436547) internal successors, (411), 197 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:55:10,802 INFO L93 Difference]: Finished difference Result 434 states and 462 transitions. [2024-12-02 07:55:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-12-02 07:55:10,803 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0862944162436547) internal successors, (411), 197 states have internal predecessors, (411), 0 states have call successors, (0), 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 167 [2024-12-02 07:55:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:55:10,804 INFO L225 Difference]: With dead ends: 434 [2024-12-02 07:55:10,804 INFO L226 Difference]: Without dead ends: 319 [2024-12-02 07:55:10,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18759 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=2648, Invalid=76594, Unknown=0, NotChecked=0, Total=79242 [2024-12-02 07:55:10,806 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 258 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 22035 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 22359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 22035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:55:10,806 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 488 Invalid, 22359 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [324 Valid, 22035 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2024-12-02 07:55:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-12-02 07:55:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 295. [2024-12-02 07:55:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0714285714285714) internal successors, (315), 294 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 315 transitions. [2024-12-02 07:55:10,864 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 315 transitions. Word has length 167 [2024-12-02 07:55:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:55:10,865 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 315 transitions. [2024-12-02 07:55:10,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0862944162436547) internal successors, (411), 197 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 315 transitions. [2024-12-02 07:55:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-12-02 07:55:10,866 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:55:10,866 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:55:10,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-12-02 07:55:11,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 07:55:11,066 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:55:11,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:55:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash -533627138, now seen corresponding path program 21 times [2024-12-02 07:55:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:55:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653478309] [2024-12-02 07:55:11,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:55:11,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:55:11,166 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 07:55:11,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2024-12-02 07:55:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:55:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653478309] [2024-12-02 07:55:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653478309] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:55:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388791054] [2024-12-02 07:55:11,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:55:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:55:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:55:11,468 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:55:11,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 07:55:11,764 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 07:55:11,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:11,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 07:55:11,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:55:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 87 proven. 73 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2024-12-02 07:55:12,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:55:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 56 proven. 104 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2024-12-02 07:55:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388791054] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:55:12,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:55:12,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 23] total 46 [2024-12-02 07:55:12,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607247823] [2024-12-02 07:55:12,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:55:12,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-12-02 07:55:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:55:12,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-12-02 07:55:12,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1509, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 07:55:12,461 INFO L87 Difference]: Start difference. First operand 295 states and 315 transitions. Second operand has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:55:14,307 INFO L93 Difference]: Finished difference Result 609 states and 656 transitions. [2024-12-02 07:55:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 07:55:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 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 169 [2024-12-02 07:55:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:55:14,309 INFO L225 Difference]: With dead ends: 609 [2024-12-02 07:55:14,309 INFO L226 Difference]: Without dead ends: 370 [2024-12-02 07:55:14,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 316 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1243, Invalid=3869, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 07:55:14,309 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 284 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:55:14,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 42 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 07:55:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-12-02 07:55:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 315. [2024-12-02 07:55:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0541401273885351) internal successors, (331), 314 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 331 transitions. [2024-12-02 07:55:14,374 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 331 transitions. Word has length 169 [2024-12-02 07:55:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:55:14,374 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 331 transitions. [2024-12-02 07:55:14,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 46 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 331 transitions. [2024-12-02 07:55:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-12-02 07:55:14,375 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:55:14,375 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:55:14,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 07:55:14,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:55:14,575 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:55:14,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:55:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 754366050, now seen corresponding path program 22 times [2024-12-02 07:55:14,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:55:14,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900735875] [2024-12-02 07:55:14,576 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:55:14,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:55:14,596 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:55:14,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-12-02 07:55:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:55:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900735875] [2024-12-02 07:55:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900735875] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:55:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342169350] [2024-12-02 07:55:14,873 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:55:14,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:55:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:55:14,875 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:55:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 07:55:14,974 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:55:14,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:14,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 07:55:14,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:55:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-12-02 07:55:15,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:55:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-12-02 07:55:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342169350] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:55:15,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:55:15,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2024-12-02 07:55:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215966862] [2024-12-02 07:55:15,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:55:15,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 07:55:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:55:15,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 07:55:15,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-12-02 07:55:15,514 INFO L87 Difference]: Start difference. First operand 315 states and 331 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:55:16,326 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2024-12-02 07:55:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 07:55:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2024-12-02 07:55:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:55:16,328 INFO L225 Difference]: With dead ends: 485 [2024-12-02 07:55:16,328 INFO L226 Difference]: Without dead ends: 195 [2024-12-02 07:55:16,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 315 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 07:55:16,329 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 430 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:55:16,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 54 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 07:55:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-12-02 07:55:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2024-12-02 07:55:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0486486486486486) internal successors, (194), 185 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2024-12-02 07:55:16,369 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 171 [2024-12-02 07:55:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:55:16,369 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2024-12-02 07:55:16,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:55:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2024-12-02 07:55:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-12-02 07:55:16,370 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:55:16,370 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:55:16,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 07:55:16,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:55:16,571 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:55:16,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:55:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2001775138, now seen corresponding path program 23 times [2024-12-02 07:55:16,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:55:16,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464409515] [2024-12-02 07:55:16,571 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:55:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:55:16,779 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 07:55:16,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 1 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:55:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:55:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464409515] [2024-12-02 07:55:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464409515] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:55:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146672964] [2024-12-02 07:55:38,110 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:55:38,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:55:38,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:55:38,112 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:55:38,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 07:55:42,682 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-12-02 07:55:42,682 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:55:42,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 331 conjuncts are in the unsatisfiable core [2024-12-02 07:55:42,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:55:42,818 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 [2024-12-02 07:55:42,974 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 [2024-12-02 07:55:43,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:43,121 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 [2024-12-02 07:55:43,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:43,304 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 33 treesize of output 38 [2024-12-02 07:55:43,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:43,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-12-02 07:55:43,676 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:43,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-12-02 07:55:43,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:43,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-12-02 07:55:44,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:44,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-12-02 07:55:44,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:55:44,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-12-02 07:56:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:56:04,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:56:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-12-02 07:56:30,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146672964] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:56:30,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:56:30,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 87, 80] total 244 [2024-12-02 07:56:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608703159] [2024-12-02 07:56:30,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:56:30,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 244 states [2024-12-02 07:56:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:56:30,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 244 interpolants. [2024-12-02 07:56:30,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=58477, Unknown=0, NotChecked=0, Total=59292 [2024-12-02 07:56:30,039 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand has 244 states, 244 states have (on average 2.110655737704918) internal successors, (515), 244 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:56:48,885 INFO L93 Difference]: Finished difference Result 341 states and 356 transitions. [2024-12-02 07:56:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-12-02 07:56:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 244 states, 244 states have (on average 2.110655737704918) internal successors, (515), 244 states have internal predecessors, (515), 0 states have call successors, (0), 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 185 [2024-12-02 07:56:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:56:48,887 INFO L225 Difference]: With dead ends: 341 [2024-12-02 07:56:48,887 INFO L226 Difference]: Without dead ends: 337 [2024-12-02 07:56:48,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14309 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=815, Invalid=58477, Unknown=0, NotChecked=0, Total=59292 [2024-12-02 07:56:48,888 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 28482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 28485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:56:48,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 747 Invalid, 28485 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 28482 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2024-12-02 07:56:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-12-02 07:56:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 311. [2024-12-02 07:56:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0516129032258064) internal successors, (326), 310 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 326 transitions. [2024-12-02 07:56:48,969 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 326 transitions. Word has length 185 [2024-12-02 07:56:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:56:48,969 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 326 transitions. [2024-12-02 07:56:48,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 244 states, 244 states have (on average 2.110655737704918) internal successors, (515), 244 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 326 transitions. [2024-12-02 07:56:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-12-02 07:56:48,970 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:56:48,970 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:56:48,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-12-02 07:56:49,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 07:56:49,171 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:56:49,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:56:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1730867966, now seen corresponding path program 24 times [2024-12-02 07:56:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:56:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911999680] [2024-12-02 07:56:49,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:56:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:56:49,255 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 07:56:49,255 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:56:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:56:49,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911999680] [2024-12-02 07:56:49,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911999680] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:56:49,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114966827] [2024-12-02 07:56:49,619 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:56:49,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:56:49,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:56:49,620 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:56:49,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 07:56:49,901 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 07:56:49,901 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:56:49,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 07:56:49,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:56:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:50,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:56:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114966827] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:56:50,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:56:50,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-12-02 07:56:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636935134] [2024-12-02 07:56:50,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:56:50,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 07:56:50,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:56:50,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 07:56:50,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 07:56:50,412 INFO L87 Difference]: Start difference. First operand 311 states and 326 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:56:52,031 INFO L93 Difference]: Finished difference Result 621 states and 657 transitions. [2024-12-02 07:56:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 07:56:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2024-12-02 07:56:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:56:52,032 INFO L225 Difference]: With dead ends: 621 [2024-12-02 07:56:52,032 INFO L226 Difference]: Without dead ends: 372 [2024-12-02 07:56:52,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 352 SyntacticMatches, 20 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=2426, Unknown=0, NotChecked=0, Total=3080 [2024-12-02 07:56:52,033 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 275 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:56:52,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 58 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 3023 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 07:56:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-12-02 07:56:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2024-12-02 07:56:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0493827160493827) internal successors, (340), 324 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 340 transitions. [2024-12-02 07:56:52,100 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 340 transitions. Word has length 187 [2024-12-02 07:56:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:56:52,100 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 340 transitions. [2024-12-02 07:56:52,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 340 transitions. [2024-12-02 07:56:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-12-02 07:56:52,101 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:56:52,101 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:56:52,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 07:56:52,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 07:56:52,301 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:56:52,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:56:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 378219970, now seen corresponding path program 25 times [2024-12-02 07:56:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:56:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652588932] [2024-12-02 07:56:52,302 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:56:52,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:56:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:56:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:56:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652588932] [2024-12-02 07:56:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652588932] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:56:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485577930] [2024-12-02 07:56:52,676 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:56:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:56:52,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:56:52,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:56:52,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 07:56:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:56:52,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 07:56:52,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:56:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:53,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:56:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-12-02 07:56:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485577930] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:56:53,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:56:53,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-12-02 07:56:53,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291550569] [2024-12-02 07:56:53,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:56:53,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 07:56:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:56:53,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 07:56:53,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 07:56:53,525 INFO L87 Difference]: Start difference. First operand 325 states and 340 transitions. Second operand has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:56:54,434 INFO L93 Difference]: Finished difference Result 533 states and 556 transitions. [2024-12-02 07:56:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:56:54,434 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2024-12-02 07:56:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:56:54,436 INFO L225 Difference]: With dead ends: 533 [2024-12-02 07:56:54,436 INFO L226 Difference]: Without dead ends: 213 [2024-12-02 07:56:54,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 343 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 07:56:54,436 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 658 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:56:54,436 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 36 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 07:56:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-12-02 07:56:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 204. [2024-12-02 07:56:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 212 transitions. [2024-12-02 07:56:54,511 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 212 transitions. Word has length 187 [2024-12-02 07:56:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:56:54,511 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 212 transitions. [2024-12-02 07:56:54,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:56:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 212 transitions. [2024-12-02 07:56:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-12-02 07:56:54,512 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:56:54,512 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:56:54,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 07:56:54,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 07:56:54,712 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:56:54,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:56:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1213785118, now seen corresponding path program 26 times [2024-12-02 07:56:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:56:54,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830721496] [2024-12-02 07:56:54,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:56:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:56:54,788 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:56:54,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:57:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:57:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:57:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830721496] [2024-12-02 07:57:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830721496] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:57:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816502393] [2024-12-02 07:57:18,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:57:18,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:57:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:57:18,229 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:57:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 07:57:18,365 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:57:18,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:57:18,370 WARN L254 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 349 conjuncts are in the unsatisfiable core [2024-12-02 07:57:18,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:57:18,469 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 [2024-12-02 07:57:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:57:27,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:57:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 07:57:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816502393] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:57:57,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:57:57,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 96, 88] total 242 [2024-12-02 07:57:57,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000561353] [2024-12-02 07:57:57,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:57:57,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2024-12-02 07:57:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:57:57,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2024-12-02 07:57:57,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1406, Invalid=56916, Unknown=0, NotChecked=0, Total=58322 [2024-12-02 07:57:57,767 INFO L87 Difference]: Start difference. First operand 204 states and 212 transitions. Second operand has 242 states, 242 states have (on average 2.0785123966942147) internal successors, (503), 242 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:58:47,863 INFO L93 Difference]: Finished difference Result 373 states and 388 transitions. [2024-12-02 07:58:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-12-02 07:58:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 242 states, 242 states have (on average 2.0785123966942147) internal successors, (503), 242 states have internal predecessors, (503), 0 states have call successors, (0), 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 203 [2024-12-02 07:58:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:58:47,865 INFO L225 Difference]: With dead ends: 373 [2024-12-02 07:58:47,865 INFO L226 Difference]: Without dead ends: 369 [2024-12-02 07:58:47,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28120 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=3155, Invalid=104757, Unknown=0, NotChecked=0, Total=107912 [2024-12-02 07:58:47,869 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 29729 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 30059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 29729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:58:47,869 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 543 Invalid, 30059 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [330 Valid, 29729 Invalid, 0 Unknown, 0 Unchecked, 23.4s Time] [2024-12-02 07:58:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-12-02 07:58:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 341. [2024-12-02 07:58:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0470588235294118) internal successors, (356), 340 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 356 transitions. [2024-12-02 07:58:48,020 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 356 transitions. Word has length 203 [2024-12-02 07:58:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:58:48,020 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 356 transitions. [2024-12-02 07:58:48,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 242 states, 242 states have (on average 2.0785123966942147) internal successors, (503), 242 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 356 transitions. [2024-12-02 07:58:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-12-02 07:58:48,021 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:58:48,022 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:58:48,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-12-02 07:58:48,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-12-02 07:58:48,222 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:58:48,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:58:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -926408186, now seen corresponding path program 27 times [2024-12-02 07:58:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:58:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961176898] [2024-12-02 07:58:48,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:58:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:58:48,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 07:58:48,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:58:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:58:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961176898] [2024-12-02 07:58:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961176898] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:58:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990467092] [2024-12-02 07:58:48,841 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:58:48,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:58:48,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:58:48,843 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:58:48,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 07:58:49,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-12-02 07:58:49,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:58:49,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 07:58:49,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:58:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:49,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:58:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:49,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990467092] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:58:49,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:58:49,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2024-12-02 07:58:49,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958383207] [2024-12-02 07:58:49,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:58:49,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-02 07:58:49,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:58:49,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-02 07:58:49,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 07:58:49,900 INFO L87 Difference]: Start difference. First operand 341 states and 356 transitions. Second operand has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:58:51,685 INFO L93 Difference]: Finished difference Result 679 states and 715 transitions. [2024-12-02 07:58:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 07:58:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 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 205 [2024-12-02 07:58:51,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:58:51,687 INFO L225 Difference]: With dead ends: 679 [2024-12-02 07:58:51,687 INFO L226 Difference]: Without dead ends: 406 [2024-12-02 07:58:51,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 386 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=772, Invalid=2888, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 07:58:51,688 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 458 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:58:51,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 50 Invalid, 3051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 07:58:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2024-12-02 07:58:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 355. [2024-12-02 07:58:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0451977401129944) internal successors, (370), 354 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 370 transitions. [2024-12-02 07:58:51,780 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 370 transitions. Word has length 205 [2024-12-02 07:58:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:58:51,780 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 370 transitions. [2024-12-02 07:58:51,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 370 transitions. [2024-12-02 07:58:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-12-02 07:58:51,781 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:58:51,781 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:58:51,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 07:58:51,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:58:51,982 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:58:51,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:58:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1722385094, now seen corresponding path program 28 times [2024-12-02 07:58:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:58:51,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937513306] [2024-12-02 07:58:51,982 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:58:51,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:58:52,007 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:58:52,007 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:58:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:58:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937513306] [2024-12-02 07:58:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937513306] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:58:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950830565] [2024-12-02 07:58:52,423 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:58:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:58:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:58:52,424 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:58:52,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 07:58:52,558 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:58:52,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:58:52,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 07:58:52,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:58:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:53,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:58:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-12-02 07:58:53,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950830565] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:58:53,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:58:53,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 36 [2024-12-02 07:58:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837653475] [2024-12-02 07:58:53,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:58:53,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 07:58:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:58:53,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 07:58:53,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:58:53,366 INFO L87 Difference]: Start difference. First operand 355 states and 370 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:58:54,585 INFO L93 Difference]: Finished difference Result 581 states and 604 transitions. [2024-12-02 07:58:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 07:58:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2024-12-02 07:58:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:58:54,587 INFO L225 Difference]: With dead ends: 581 [2024-12-02 07:58:54,587 INFO L226 Difference]: Without dead ends: 231 [2024-12-02 07:58:54,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 22 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=1620, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 07:58:54,588 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 463 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:58:54,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 66 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 07:58:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-12-02 07:58:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 222. [2024-12-02 07:58:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0407239819004526) internal successors, (230), 221 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2024-12-02 07:58:54,654 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 205 [2024-12-02 07:58:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:58:54,654 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2024-12-02 07:58:54,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 36 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:58:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2024-12-02 07:58:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2024-12-02 07:58:54,655 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:58:54,655 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:58:54,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 07:58:54,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:58:54,856 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 07:58:54,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:58:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1430230810, now seen corresponding path program 29 times [2024-12-02 07:58:54,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:58:54,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359238364] [2024-12-02 07:58:54,856 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:58:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:58:55,427 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-12-02 07:58:55,427 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:59:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:59:35,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:59:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359238364] [2024-12-02 07:59:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359238364] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:59:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204627727] [2024-12-02 07:59:35,946 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:59:35,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:59:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:59:35,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:59:35,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 07:59:38,061 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-12-02 07:59:38,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:59:38,072 WARN L254 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 397 conjuncts are in the unsatisfiable core [2024-12-02 07:59:38,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:59:38,533 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 [2024-12-02 07:59:38,703 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 [2024-12-02 07:59:38,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:38,885 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 [2024-12-02 07:59:39,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:39,077 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 33 treesize of output 38 [2024-12-02 07:59:39,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:39,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-12-02 07:59:39,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:39,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-12-02 07:59:39,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:39,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-12-02 07:59:39,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:59:39,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-12-02 08:00:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:00:05,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:00:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-12-02 08:00:53,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204627727] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:00:53,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:00:53,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 105, 96] total 301 [2024-12-02 08:00:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228510509] [2024-12-02 08:00:53,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:00:53,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 301 states [2024-12-02 08:00:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:00:53,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 301 interpolants. [2024-12-02 08:00:53,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=969, Invalid=89331, Unknown=0, NotChecked=0, Total=90300 [2024-12-02 08:00:53,245 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand has 301 states, 301 states have (on average 2.089700996677741) internal successors, (629), 301 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:01:29,725 INFO L93 Difference]: Finished difference Result 405 states and 420 transitions. [2024-12-02 08:01:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2024-12-02 08:01:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 301 states, 301 states have (on average 2.089700996677741) internal successors, (629), 301 states have internal predecessors, (629), 0 states have call successors, (0), 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 221 [2024-12-02 08:01:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:01:29,727 INFO L225 Difference]: With dead ends: 405 [2024-12-02 08:01:29,727 INFO L226 Difference]: Without dead ends: 401 [2024-12-02 08:01:29,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25140 ImplicationChecksByTransitivity, 90.1s TimeCoverageRelationStatistics Valid=1101, Invalid=103551, Unknown=0, NotChecked=0, Total=104652 [2024-12-02 08:01:29,729 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 38125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 38131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2024-12-02 08:01:29,730 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 726 Invalid, 38131 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 38125 Invalid, 0 Unknown, 0 Unchecked, 27.4s Time] [2024-12-02 08:01:29,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-12-02 08:01:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 371. [2024-12-02 08:01:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.0432432432432432) internal successors, (386), 370 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 386 transitions. [2024-12-02 08:01:29,831 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 386 transitions. Word has length 221 [2024-12-02 08:01:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:01:29,831 INFO L471 AbstractCegarLoop]: Abstraction has 371 states and 386 transitions. [2024-12-02 08:01:29,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 301 states, 301 states have (on average 2.089700996677741) internal successors, (629), 301 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 386 transitions. [2024-12-02 08:01:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-12-02 08:01:29,833 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:01:29,833 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:01:29,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-12-02 08:01:30,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:01:30,033 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 08:01:30,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:01:30,034 INFO L85 PathProgramCache]: Analyzing trace with hash -744030710, now seen corresponding path program 30 times [2024-12-02 08:01:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:01:30,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520041210] [2024-12-02 08:01:30,034 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 08:01:30,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:01:30,200 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-12-02 08:01:30,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:01:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:30,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:01:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520041210] [2024-12-02 08:01:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520041210] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:01:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574785154] [2024-12-02 08:01:30,712 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 08:01:30,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:01:30,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:01:30,714 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:01:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 08:01:31,243 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-12-02 08:01:31,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:01:31,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 08:01:31,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:01:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:31,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:01:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574785154] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:01:31,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:01:31,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2024-12-02 08:01:31,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258479279] [2024-12-02 08:01:31,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:01:31,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 08:01:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:01:31,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 08:01:31,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 08:01:31,896 INFO L87 Difference]: Start difference. First operand 371 states and 386 transitions. Second operand has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:01:34,154 INFO L93 Difference]: Finished difference Result 737 states and 773 transitions. [2024-12-02 08:01:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 08:01:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 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 223 [2024-12-02 08:01:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:01:34,156 INFO L225 Difference]: With dead ends: 737 [2024-12-02 08:01:34,156 INFO L226 Difference]: Without dead ends: 440 [2024-12-02 08:01:34,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 420 SyntacticMatches, 24 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=900, Invalid=3390, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 08:01:34,157 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 463 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4140 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 4620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 4140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 08:01:34,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 76 Invalid, 4620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 4140 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 08:01:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2024-12-02 08:01:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 385. [2024-12-02 08:01:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0416666666666667) internal successors, (400), 384 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 400 transitions. [2024-12-02 08:01:34,257 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 400 transitions. Word has length 223 [2024-12-02 08:01:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:01:34,257 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 400 transitions. [2024-12-02 08:01:34,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 400 transitions. [2024-12-02 08:01:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-12-02 08:01:34,258 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:01:34,258 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:01:34,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 08:01:34,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:01:34,459 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 08:01:34,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:01:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash -123494710, now seen corresponding path program 31 times [2024-12-02 08:01:34,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:01:34,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532663613] [2024-12-02 08:01:34,459 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 08:01:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:01:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:01:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:34,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:01:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532663613] [2024-12-02 08:01:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532663613] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:01:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070791381] [2024-12-02 08:01:34,988 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 08:01:34,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:01:34,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:01:34,989 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:01:34,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 08:01:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:01:35,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 08:01:35,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:01:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:35,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:01:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2024-12-02 08:01:36,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070791381] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:01:36,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:01:36,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2024-12-02 08:01:36,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427642451] [2024-12-02 08:01:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:01:36,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 08:01:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:01:36,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 08:01:36,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 08:01:36,059 INFO L87 Difference]: Start difference. First operand 385 states and 400 transitions. Second operand has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:01:37,384 INFO L93 Difference]: Finished difference Result 629 states and 652 transitions. [2024-12-02 08:01:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 08:01:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 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 223 [2024-12-02 08:01:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:01:37,386 INFO L225 Difference]: With dead ends: 629 [2024-12-02 08:01:37,386 INFO L226 Difference]: Without dead ends: 249 [2024-12-02 08:01:37,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=648, Invalid=2004, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 08:01:37,386 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 650 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:01:37,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 53 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 08:01:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-12-02 08:01:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2024-12-02 08:01:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0376569037656904) internal successors, (248), 239 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2024-12-02 08:01:37,462 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 223 [2024-12-02 08:01:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:01:37,462 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2024-12-02 08:01:37,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7560975609756095) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:01:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2024-12-02 08:01:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2024-12-02 08:01:37,463 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:01:37,463 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:01:37,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 08:01:37,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:01:37,664 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 08:01:37,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:01:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash -250118934, now seen corresponding path program 32 times [2024-12-02 08:01:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:01:37,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871872092] [2024-12-02 08:01:37,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:01:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:01:37,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:01:37,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:02:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:02:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:02:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871872092] [2024-12-02 08:02:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871872092] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:02:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689405690] [2024-12-02 08:02:14,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:02:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:02:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:02:14,840 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:02:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668b2925-ad9d-4c2f-b177-ca26b01a2300/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 08:02:14,989 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:02:14,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:02:14,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 417 conjuncts are in the unsatisfiable core [2024-12-02 08:02:15,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:02:15,100 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 [2024-12-02 08:02:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:02:29,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:03:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-12-02 08:03:17,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689405690] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:03:17,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:03:17,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 114, 104] total 291 [2024-12-02 08:03:17,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775842866] [2024-12-02 08:03:17,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:03:17,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 291 states [2024-12-02 08:03:17,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:03:17,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 291 interpolants. [2024-12-02 08:03:17,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=83096, Unknown=0, NotChecked=0, Total=84390 [2024-12-02 08:03:17,425 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand has 291 states, 291 states have (on average 2.0446735395189) internal successors, (595), 291 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)