./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/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 f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:45:38,808 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:45:38,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 10:45:38,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:45:38,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:45:38,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:45:38,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:45:38,894 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:45:38,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:45:38,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:45:38,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:45:38,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:45:38,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:45:38,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:45:38,895 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:45:38,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:45:38,896 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:45:38,897 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:45:38,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:45:38,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:45:38,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:45:38,898 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:45:38,898 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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/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 -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2024-12-02 10:45:39,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:45:39,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:45:39,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:45:39,151 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:45:39,151 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:45:39,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2024-12-02 10:45:41,747 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/data/b32b2a73c/f2e3673e84254f018dbf4de80ec2c33f/FLAG40dc15db8 [2024-12-02 10:45:41,954 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:45:41,955 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2024-12-02 10:45:41,964 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/data/b32b2a73c/f2e3673e84254f018dbf4de80ec2c33f/FLAG40dc15db8 [2024-12-02 10:45:42,313 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/data/b32b2a73c/f2e3673e84254f018dbf4de80ec2c33f [2024-12-02 10:45:42,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:45:42,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:45:42,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:45:42,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:45:42,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:45:42,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff3c46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42, skipping insertion in model container [2024-12-02 10:45:42,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:45:42,458 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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2024-12-02 10:45:42,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:45:42,508 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:45:42,517 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_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2024-12-02 10:45:42,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:45:42,554 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:45:42,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42 WrapperNode [2024-12-02 10:45:42,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:45:42,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:45:42,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:45:42,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:45:42,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,585 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2024-12-02 10:45:42,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:45:42,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:45:42,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:45:42,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:45:42,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,596 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,607 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 10:45:42,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,611 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:45:42,620 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:45:42,620 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:45:42,620 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:45:42,621 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (1/1) ... [2024-12-02 10:45:42,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:45:42,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:42,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:45:42,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:45:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:45:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 10:45:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-12-02 10:45:42,668 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-12-02 10:45:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:45:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:45:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 10:45:42,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 10:45:42,724 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:45:42,725 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:45:42,986 INFO L? ?]: Removed 62 outVars from TransFormulas that were not future-live. [2024-12-02 10:45:42,986 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:45:42,995 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:45:42,995 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 10:45:42,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:45:42 BoogieIcfgContainer [2024-12-02 10:45:42,996 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:45:42,998 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:45:42,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:45:43,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:45:43,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:45:42" (1/3) ... [2024-12-02 10:45:43,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf20be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:45:43, skipping insertion in model container [2024-12-02 10:45:43,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:45:42" (2/3) ... [2024-12-02 10:45:43,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf20be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:45:43, skipping insertion in model container [2024-12-02 10:45:43,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:45:42" (3/3) ... [2024-12-02 10:45:43,004 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2024-12-02 10:45:43,015 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:45:43,016 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_2a.c.cil.c that has 3 procedures, 73 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-12-02 10:45:43,056 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:45:43,065 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;@33140c34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:45:43,066 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 10:45:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 64 states have (on average 1.5625) internal successors, (100), 66 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-02 10:45:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 10:45:43,075 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:43,076 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-12-02 10:45:43,076 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:43,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1753806442, now seen corresponding path program 1 times [2024-12-02 10:45:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780141334] [2024-12-02 10:45:43,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:43,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 10:45:43,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:43,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780141334] [2024-12-02 10:45:43,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780141334] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:43,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:45:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 10:45:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014515728] [2024-12-02 10:45:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:43,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:45:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:43,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:45:43,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:45:43,330 INFO L87 Difference]: Start difference. First operand has 73 states, 64 states have (on average 1.5625) internal successors, (100), 66 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:43,365 INFO L93 Difference]: Finished difference Result 171 states and 265 transitions. [2024-12-02 10:45:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:45:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2024-12-02 10:45:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:43,372 INFO L225 Difference]: With dead ends: 171 [2024-12-02 10:45:43,372 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 10:45:43,374 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 10:45:43,377 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 35 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:43,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 199 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 10:45:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-12-02 10:45:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 10:45:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2024-12-02 10:45:43,408 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 42 [2024-12-02 10:45:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:43,410 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2024-12-02 10:45:43,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2024-12-02 10:45:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 10:45:43,412 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:43,412 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-12-02 10:45:43,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 10:45:43,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:43,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1500770532, now seen corresponding path program 1 times [2024-12-02 10:45:43,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:43,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836012825] [2024-12-02 10:45:43,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:43,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 10:45:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836012825] [2024-12-02 10:45:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836012825] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:45:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:45:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121471472] [2024-12-02 10:45:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:43,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:45:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:43,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:45:43,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:45:43,536 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:43,560 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2024-12-02 10:45:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:45:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-12-02 10:45:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:43,561 INFO L225 Difference]: With dead ends: 104 [2024-12-02 10:45:43,561 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 10:45:43,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:45:43,562 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 35 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:43,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 277 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 10:45:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-12-02 10:45:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 60 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 10:45:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2024-12-02 10:45:43,569 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 44 [2024-12-02 10:45:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:43,570 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2024-12-02 10:45:43,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2024-12-02 10:45:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 10:45:43,571 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:43,571 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-12-02 10:45:43,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 10:45:43,572 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:43,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 913964518, now seen corresponding path program 1 times [2024-12-02 10:45:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:43,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855015816] [2024-12-02 10:45:43,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855015816] [2024-12-02 10:45:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855015816] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049381720] [2024-12-02 10:45:43,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:43,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:43,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:45:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:43,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 10:45:43,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:45:43,810 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049381720] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:43,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:43,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 10:45:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713311988] [2024-12-02 10:45:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:43,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:45:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:43,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:45:43,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:43,812 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:43,920 INFO L93 Difference]: Finished difference Result 150 states and 216 transitions. [2024-12-02 10:45:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:45:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-12-02 10:45:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:43,923 INFO L225 Difference]: With dead ends: 150 [2024-12-02 10:45:43,923 INFO L226 Difference]: Without dead ends: 86 [2024-12-02 10:45:43,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:45:43,924 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:43,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 216 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-12-02 10:45:43,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-12-02 10:45:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.408450704225352) internal successors, (100), 71 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-12-02 10:45:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 111 transitions. [2024-12-02 10:45:43,933 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 111 transitions. Word has length 44 [2024-12-02 10:45:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:43,933 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 111 transitions. [2024-12-02 10:45:43,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2024-12-02 10:45:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 10:45:43,935 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:43,935 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 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 10:45:43,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:45:44,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:44,136 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:44,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1060087731, now seen corresponding path program 1 times [2024-12-02 10:45:44,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:44,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258931906] [2024-12-02 10:45:44,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:44,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:44,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258931906] [2024-12-02 10:45:44,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258931906] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:44,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31305527] [2024-12-02 10:45:44,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:44,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:44,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:44,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:45:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:44,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 10:45:44,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:45:44,318 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:44,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31305527] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:44,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:44,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 10:45:44,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552088976] [2024-12-02 10:45:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:44,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:45:44,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:44,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:45:44,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:44,320 INFO L87 Difference]: Start difference. First operand 79 states and 111 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:44,374 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2024-12-02 10:45:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:45:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-12-02 10:45:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:44,376 INFO L225 Difference]: With dead ends: 165 [2024-12-02 10:45:44,376 INFO L226 Difference]: Without dead ends: 93 [2024-12-02 10:45:44,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:44,377 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:44,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-12-02 10:45:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2024-12-02 10:45:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 75 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2024-12-02 10:45:44,387 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 46 [2024-12-02 10:45:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:44,387 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2024-12-02 10:45:44,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2024-12-02 10:45:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-12-02 10:45:44,388 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:44,388 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:44,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:45:44,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:44,589 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:44,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash 971571092, now seen corresponding path program 1 times [2024-12-02 10:45:44,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:44,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884700787] [2024-12-02 10:45:44,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:44,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:44,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:44,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884700787] [2024-12-02 10:45:44,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884700787] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:44,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870987356] [2024-12-02 10:45:44,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:44,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:44,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:44,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:45:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:44,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 10:45:44,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:45:44,748 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870987356] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:44,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-12-02 10:45:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891978338] [2024-12-02 10:45:44,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:44,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:45:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:44,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:45:44,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:44,750 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:44,806 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2024-12-02 10:45:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:45:44,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-12-02 10:45:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:44,808 INFO L225 Difference]: With dead ends: 170 [2024-12-02 10:45:44,808 INFO L226 Difference]: Without dead ends: 94 [2024-12-02 10:45:44,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:44,809 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:44,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 235 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-12-02 10:45:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2024-12-02 10:45:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 76 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2024-12-02 10:45:44,818 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 47 [2024-12-02 10:45:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:44,818 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2024-12-02 10:45:44,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2024-12-02 10:45:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 10:45:44,819 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:44,820 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:44,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:45:45,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:45,020 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:45,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1021422544, now seen corresponding path program 1 times [2024-12-02 10:45:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:45,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772520130] [2024-12-02 10:45:45,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772520130] [2024-12-02 10:45:45,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772520130] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244664848] [2024-12-02 10:45:45,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:45,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:45,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:45,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:45:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:45,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:45:45,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:45:45,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244664848] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:45,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:45,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-12-02 10:45:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503320751] [2024-12-02 10:45:45,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:45,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:45:45,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:45,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:45:45,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:45:45,294 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:45,429 INFO L93 Difference]: Finished difference Result 218 states and 319 transitions. [2024-12-02 10:45:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:45:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-12-02 10:45:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:45,431 INFO L225 Difference]: With dead ends: 218 [2024-12-02 10:45:45,431 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 10:45:45,432 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:45:45,432 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 85 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:45,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 552 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 10:45:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2024-12-02 10:45:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 87 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2024-12-02 10:45:45,444 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 48 [2024-12-02 10:45:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:45,444 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2024-12-02 10:45:45,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2024-12-02 10:45:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 10:45:45,445 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:45,446 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2024-12-02 10:45:45,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:45:45,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:45,646 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:45,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1032113724, now seen corresponding path program 1 times [2024-12-02 10:45:45,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:45,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658778535] [2024-12-02 10:45:45,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:45,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658778535] [2024-12-02 10:45:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658778535] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203053024] [2024-12-02 10:45:45,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:45,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:45,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:45,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:45:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:45,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:45:45,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:45:45,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:45,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203053024] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:45,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-12-02 10:45:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72815029] [2024-12-02 10:45:45,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:45,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:45:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:45,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:45:45,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:45:45,930 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:46,056 INFO L93 Difference]: Finished difference Result 231 states and 345 transitions. [2024-12-02 10:45:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:45:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-12-02 10:45:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:46,057 INFO L225 Difference]: With dead ends: 231 [2024-12-02 10:45:46,058 INFO L226 Difference]: Without dead ends: 143 [2024-12-02 10:45:46,058 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:45:46,059 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 88 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:46,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 495 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-12-02 10:45:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2024-12-02 10:45:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.5) internal successors, (138), 93 states have internal predecessors, (138), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 151 transitions. [2024-12-02 10:45:46,070 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 151 transitions. Word has length 49 [2024-12-02 10:45:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:46,070 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 151 transitions. [2024-12-02 10:45:46,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 151 transitions. [2024-12-02 10:45:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 10:45:46,071 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:46,072 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:46,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:45:46,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:46,272 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:46,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -419297621, now seen corresponding path program 1 times [2024-12-02 10:45:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226350371] [2024-12-02 10:45:46,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 10:45:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226350371] [2024-12-02 10:45:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226350371] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37587260] [2024-12-02 10:45:46,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:46,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:46,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:45:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:46,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 10:45:46,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 10:45:46,380 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37587260] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:46,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-12-02 10:45:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883931627] [2024-12-02 10:45:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:46,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:45:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:46,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:45:46,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:45:46,382 INFO L87 Difference]: Start difference. First operand 101 states and 151 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:46,417 INFO L93 Difference]: Finished difference Result 204 states and 312 transitions. [2024-12-02 10:45:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:45:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-12-02 10:45:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:46,418 INFO L225 Difference]: With dead ends: 204 [2024-12-02 10:45:46,418 INFO L226 Difference]: Without dead ends: 110 [2024-12-02 10:45:46,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 1 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 10:45:46,419 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:46,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 169 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-12-02 10:45:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2024-12-02 10:45:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 95 states have internal predecessors, (140), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 153 transitions. [2024-12-02 10:45:46,429 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 153 transitions. Word has length 51 [2024-12-02 10:45:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:46,429 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 153 transitions. [2024-12-02 10:45:46,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 153 transitions. [2024-12-02 10:45:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 10:45:46,431 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:46,431 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:46,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:45:46,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:46,631 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:46,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash 558746671, now seen corresponding path program 1 times [2024-12-02 10:45:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:46,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614061134] [2024-12-02 10:45:46,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:46,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 10:45:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614061134] [2024-12-02 10:45:46,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614061134] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:46,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455868641] [2024-12-02 10:45:46,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:46,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:46,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:46,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:45:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:46,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 10:45:46,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 10:45:46,745 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:46,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455868641] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:46,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2024-12-02 10:45:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535697480] [2024-12-02 10:45:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:46,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:45:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:46,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:45:46,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:45:46,747 INFO L87 Difference]: Start difference. First operand 103 states and 153 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:46,784 INFO L93 Difference]: Finished difference Result 202 states and 306 transitions. [2024-12-02 10:45:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:45:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-12-02 10:45:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:46,786 INFO L225 Difference]: With dead ends: 202 [2024-12-02 10:45:46,786 INFO L226 Difference]: Without dead ends: 106 [2024-12-02 10:45:46,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 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 10:45:46,787 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:46,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 167 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-12-02 10:45:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2024-12-02 10:45:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 91 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 145 transitions. [2024-12-02 10:45:46,796 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 145 transitions. Word has length 51 [2024-12-02 10:45:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:46,796 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 145 transitions. [2024-12-02 10:45:46,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 145 transitions. [2024-12-02 10:45:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-12-02 10:45:46,796 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:46,797 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:46,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:45:46,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-12-02 10:45:46,997 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:46,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1564076929, now seen corresponding path program 1 times [2024-12-02 10:45:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213149178] [2024-12-02 10:45:46,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:45:47,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213149178] [2024-12-02 10:45:47,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213149178] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:47,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374992675] [2024-12-02 10:45:47,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:47,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:47,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:47,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:47,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:45:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:47,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 10:45:47,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:47,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374992675] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:47,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2024-12-02 10:45:47,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593393395] [2024-12-02 10:45:47,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:47,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:45:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:47,457 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:45:47,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:45:47,457 INFO L87 Difference]: Start difference. First operand 99 states and 145 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:45:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:47,765 INFO L93 Difference]: Finished difference Result 217 states and 318 transitions. [2024-12-02 10:45:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 10:45:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 52 [2024-12-02 10:45:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:47,766 INFO L225 Difference]: With dead ends: 217 [2024-12-02 10:45:47,766 INFO L226 Difference]: Without dead ends: 125 [2024-12-02 10:45:47,767 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:45:47,768 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 112 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:47,768 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 776 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:45:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-12-02 10:45:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2024-12-02 10:45:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.3863636363636365) internal successors, (122), 89 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 135 transitions. [2024-12-02 10:45:47,778 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 135 transitions. Word has length 52 [2024-12-02 10:45:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:47,778 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 135 transitions. [2024-12-02 10:45:47,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:45:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 135 transitions. [2024-12-02 10:45:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-12-02 10:45:47,779 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:47,779 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:47,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:45:47,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:47,979 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:47,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash -968158903, now seen corresponding path program 1 times [2024-12-02 10:45:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481854019] [2024-12-02 10:45:47,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-12-02 10:45:48,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:48,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481854019] [2024-12-02 10:45:48,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481854019] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:48,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:45:48,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 10:45:48,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333273053] [2024-12-02 10:45:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:48,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:45:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:48,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:45:48,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:45:48,057 INFO L87 Difference]: Start difference. First operand 97 states and 135 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:48,077 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2024-12-02 10:45:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:45:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2024-12-02 10:45:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:48,078 INFO L225 Difference]: With dead ends: 103 [2024-12-02 10:45:48,078 INFO L226 Difference]: Without dead ends: 92 [2024-12-02 10:45:48,079 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:45:48,079 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 1 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:48,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 449 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-12-02 10:45:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-12-02 10:45:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.3734939759036144) internal successors, (114), 84 states have internal predecessors, (114), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 127 transitions. [2024-12-02 10:45:48,085 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 127 transitions. Word has length 54 [2024-12-02 10:45:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:48,085 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 127 transitions. [2024-12-02 10:45:48,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 127 transitions. [2024-12-02 10:45:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-12-02 10:45:48,086 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:48,086 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:48,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 10:45:48,086 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:48,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1822225625, now seen corresponding path program 1 times [2024-12-02 10:45:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711706742] [2024-12-02 10:45:48,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 10:45:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711706742] [2024-12-02 10:45:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711706742] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181825141] [2024-12-02 10:45:48,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:48,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:48,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:48,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:48,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:45:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:48,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:45:48,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 10:45:48,277 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181825141] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:48,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:48,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-12-02 10:45:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257841806] [2024-12-02 10:45:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:48,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:45:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:48,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:45:48,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:45:48,279 INFO L87 Difference]: Start difference. First operand 92 states and 127 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:48,316 INFO L93 Difference]: Finished difference Result 183 states and 257 transitions. [2024-12-02 10:45:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:45:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-12-02 10:45:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:48,317 INFO L225 Difference]: With dead ends: 183 [2024-12-02 10:45:48,317 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 10:45:48,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:45:48,318 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:48,318 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 10:45:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2024-12-02 10:45:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.3614457831325302) internal successors, (113), 84 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2024-12-02 10:45:48,325 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 59 [2024-12-02 10:45:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:48,325 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2024-12-02 10:45:48,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2024-12-02 10:45:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-12-02 10:45:48,326 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:48,326 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:45:48,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:45:48,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 10:45:48,527 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:48,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1034775456, now seen corresponding path program 1 times [2024-12-02 10:45:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:48,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119737378] [2024-12-02 10:45:48,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:48,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 10:45:48,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:48,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119737378] [2024-12-02 10:45:48,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119737378] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:48,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:45:48,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 10:45:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841747405] [2024-12-02 10:45:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:48,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:45:48,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:48,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:45:48,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:45:48,696 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:48,732 INFO L93 Difference]: Finished difference Result 139 states and 186 transitions. [2024-12-02 10:45:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:45:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-12-02 10:45:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:48,734 INFO L225 Difference]: With dead ends: 139 [2024-12-02 10:45:48,734 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 10:45:48,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:45:48,735 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:48,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 505 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 10:45:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-12-02 10:45:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 90 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-12-02 10:45:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2024-12-02 10:45:48,744 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 60 [2024-12-02 10:45:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:48,744 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2024-12-02 10:45:48,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2024-12-02 10:45:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 10:45:48,745 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:48,745 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:48,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 10:45:48,746 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:48,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 864126786, now seen corresponding path program 1 times [2024-12-02 10:45:48,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:48,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323517660] [2024-12-02 10:45:48,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:48,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323517660] [2024-12-02 10:45:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323517660] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034860518] [2024-12-02 10:45:48,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:48,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:48,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:45:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:49,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:45:49,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:49,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:49,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034860518] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:49,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:49,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-12-02 10:45:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951943107] [2024-12-02 10:45:49,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:49,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 10:45:49,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:49,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 10:45:49,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:45:49,119 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:49,179 INFO L93 Difference]: Finished difference Result 141 states and 186 transitions. [2024-12-02 10:45:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:45:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2024-12-02 10:45:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:49,180 INFO L225 Difference]: With dead ends: 141 [2024-12-02 10:45:49,180 INFO L226 Difference]: Without dead ends: 115 [2024-12-02 10:45:49,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:45:49,181 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:49,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 566 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:45:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-12-02 10:45:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-12-02 10:45:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.316831683168317) internal successors, (133), 104 states have internal predecessors, (133), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:45:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2024-12-02 10:45:49,193 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 63 [2024-12-02 10:45:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:49,193 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2024-12-02 10:45:49,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2024-12-02 10:45:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 10:45:49,194 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:49,194 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:49,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:45:49,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:49,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:49,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1842492608, now seen corresponding path program 1 times [2024-12-02 10:45:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266441214] [2024-12-02 10:45:49,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:49,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:49,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266441214] [2024-12-02 10:45:49,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266441214] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:49,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819924287] [2024-12-02 10:45:49,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:49,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:49,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:49,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:49,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:45:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:49,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:45:49,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:49,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 10:45:49,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819924287] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:49,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:49,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-12-02 10:45:49,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783915984] [2024-12-02 10:45:49,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:49,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:45:49,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:49,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:45:49,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:45:49,815 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-12-02 10:45:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:49,904 INFO L93 Difference]: Finished difference Result 168 states and 220 transitions. [2024-12-02 10:45:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 10:45:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-12-02 10:45:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:49,906 INFO L225 Difference]: With dead ends: 168 [2024-12-02 10:45:49,906 INFO L226 Difference]: Without dead ends: 110 [2024-12-02 10:45:49,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-12-02 10:45:49,907 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:49,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 892 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-12-02 10:45:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-12-02 10:45:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 101 states have internal predecessors, (127), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-12-02 10:45:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2024-12-02 10:45:49,917 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 63 [2024-12-02 10:45:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:49,917 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2024-12-02 10:45:49,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-12-02 10:45:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2024-12-02 10:45:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-12-02 10:45:49,918 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:49,918 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:49,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:45:50,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 10:45:50,119 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:50,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1548504912, now seen corresponding path program 2 times [2024-12-02 10:45:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569852478] [2024-12-02 10:45:50,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:45:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:50,161 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 10:45:50,161 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:45:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 10:45:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:50,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569852478] [2024-12-02 10:45:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569852478] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:50,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:45:50,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:45:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260231062] [2024-12-02 10:45:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:50,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 10:45:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:50,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 10:45:50,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:45:50,396 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:50,478 INFO L93 Difference]: Finished difference Result 144 states and 184 transitions. [2024-12-02 10:45:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 10:45:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2024-12-02 10:45:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:50,479 INFO L225 Difference]: With dead ends: 144 [2024-12-02 10:45:50,479 INFO L226 Difference]: Without dead ends: 114 [2024-12-02 10:45:50,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:45:50,480 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 8 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:50,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 648 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-12-02 10:45:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-12-02 10:45:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2772277227722773) internal successors, (129), 103 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-12-02 10:45:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2024-12-02 10:45:50,490 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 66 [2024-12-02 10:45:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:50,490 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2024-12-02 10:45:50,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:45:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2024-12-02 10:45:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-12-02 10:45:50,491 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:50,491 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:50,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 10:45:50,491 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:50,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash 439574229, now seen corresponding path program 1 times [2024-12-02 10:45:50,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:50,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266491205] [2024-12-02 10:45:50,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:50,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 10:45:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:50,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266491205] [2024-12-02 10:45:50,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266491205] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:50,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572983711] [2024-12-02 10:45:50,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:50,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:50,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:45:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:50,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 10:45:50,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 10:45:50,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 10:45:51,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572983711] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:51,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:51,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-12-02 10:45:51,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715694197] [2024-12-02 10:45:51,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:51,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 10:45:51,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:51,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 10:45:51,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:45:51,097 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2024-12-02 10:45:51,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:51,207 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2024-12-02 10:45:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:45:51,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2024-12-02 10:45:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:51,208 INFO L225 Difference]: With dead ends: 168 [2024-12-02 10:45:51,208 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 10:45:51,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:45:51,209 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 45 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:51,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1079 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 10:45:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-12-02 10:45:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2772277227722773) internal successors, (129), 103 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:45:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2024-12-02 10:45:51,217 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 68 [2024-12-02 10:45:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:51,217 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2024-12-02 10:45:51,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 19 states have internal predecessors, (86), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2024-12-02 10:45:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2024-12-02 10:45:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-12-02 10:45:51,218 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:51,218 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:51,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:45:51,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 10:45:51,419 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:51,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -187057910, now seen corresponding path program 1 times [2024-12-02 10:45:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:51,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927432645] [2024-12-02 10:45:51,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 10:45:51,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927432645] [2024-12-02 10:45:51,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927432645] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:51,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251443114] [2024-12-02 10:45:51,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:51,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:51,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:51,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:51,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:45:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:51,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 10:45:51,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-12-02 10:45:52,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-12-02 10:45:53,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251443114] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:53,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 15] total 30 [2024-12-02 10:45:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550706582] [2024-12-02 10:45:53,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:53,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 10:45:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:53,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 10:45:53,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2024-12-02 10:45:53,201 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-12-02 10:45:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:54,332 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2024-12-02 10:45:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 10:45:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 73 [2024-12-02 10:45:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:54,334 INFO L225 Difference]: With dead ends: 263 [2024-12-02 10:45:54,334 INFO L226 Difference]: Without dead ends: 160 [2024-12-02 10:45:54,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=2167, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 10:45:54,336 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 88 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:54,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1276 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:45:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-12-02 10:45:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2024-12-02 10:45:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 115 states have internal predecessors, (138), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-12-02 10:45:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2024-12-02 10:45:54,348 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 73 [2024-12-02 10:45:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:54,348 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2024-12-02 10:45:54,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2024-12-02 10:45:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2024-12-02 10:45:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-12-02 10:45:54,350 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:54,350 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:54,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:45:54,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 10:45:54,550 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:54,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1003073027, now seen corresponding path program 1 times [2024-12-02 10:45:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823446902] [2024-12-02 10:45:54,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 10:45:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:54,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823446902] [2024-12-02 10:45:54,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823446902] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:54,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969805951] [2024-12-02 10:45:54,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:54,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:54,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:45:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:54,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 10:45:54,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 10:45:55,034 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:45:55,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969805951] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:45:55,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:45:55,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2024-12-02 10:45:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258847920] [2024-12-02 10:45:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:45:55,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:45:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:55,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:45:55,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:45:55,036 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:55,139 INFO L93 Difference]: Finished difference Result 268 states and 347 transitions. [2024-12-02 10:45:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:45:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2024-12-02 10:45:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:55,141 INFO L225 Difference]: With dead ends: 268 [2024-12-02 10:45:55,141 INFO L226 Difference]: Without dead ends: 149 [2024-12-02 10:45:55,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:45:55,142 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 24 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:55,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-12-02 10:45:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2024-12-02 10:45:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 115 states have internal predecessors, (138), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-12-02 10:45:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2024-12-02 10:45:55,154 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 73 [2024-12-02 10:45:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:55,155 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2024-12-02 10:45:55,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:45:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2024-12-02 10:45:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-12-02 10:45:55,156 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:55,156 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:55,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:45:55,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:55,356 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:55,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:55,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1716491106, now seen corresponding path program 1 times [2024-12-02 10:45:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:55,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46191646] [2024-12-02 10:45:55,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:55,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 10:45:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46191646] [2024-12-02 10:45:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46191646] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564967249] [2024-12-02 10:45:55,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:55,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:55,487 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:45:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:55,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 10:45:55,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 10:45:55,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 10:45:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564967249] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:55,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:55,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-12-02 10:45:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717283203] [2024-12-02 10:45:55,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:55,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:45:55,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:55,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:45:55,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:45:55,752 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:55,896 INFO L93 Difference]: Finished difference Result 342 states and 447 transitions. [2024-12-02 10:45:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 10:45:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2024-12-02 10:45:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:55,898 INFO L225 Difference]: With dead ends: 342 [2024-12-02 10:45:55,898 INFO L226 Difference]: Without dead ends: 217 [2024-12-02 10:45:55,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:45:55,907 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 246 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:55,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 606 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:45:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-12-02 10:45:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 138. [2024-12-02 10:45:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.2580645161290323) internal successors, (156), 127 states have internal predecessors, (156), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-12-02 10:45:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2024-12-02 10:45:55,921 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 74 [2024-12-02 10:45:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:55,921 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2024-12-02 10:45:55,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:45:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2024-12-02 10:45:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-12-02 10:45:55,922 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:45:55,922 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:55,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-12-02 10:45:56,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:56,123 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:45:56,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:45:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1172300954, now seen corresponding path program 1 times [2024-12-02 10:45:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:45:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050661536] [2024-12-02 10:45:56,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:45:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-02 10:45:56,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:45:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050661536] [2024-12-02 10:45:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050661536] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:45:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920389310] [2024-12-02 10:45:56,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:45:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:45:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:45:56,285 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:45:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:45:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:45:56,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 10:45:56,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:45:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-12-02 10:45:56,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:45:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-12-02 10:45:56,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920389310] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:45:56,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:45:56,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 19 [2024-12-02 10:45:56,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197807341] [2024-12-02 10:45:56,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:45:56,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:45:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:45:56,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:45:56,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:45:56,881 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 19 states, 19 states have (on average 4.421052631578948) internal successors, (84), 17 states have internal predecessors, (84), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:45:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:45:57,174 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2024-12-02 10:45:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 10:45:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.421052631578948) internal successors, (84), 17 states have internal predecessors, (84), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-12-02 10:45:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:45:57,175 INFO L225 Difference]: With dead ends: 254 [2024-12-02 10:45:57,175 INFO L226 Difference]: Without dead ends: 0 [2024-12-02 10:45:57,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-12-02 10:45:57,176 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:45:57,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 264 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:45:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-12-02 10:45:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-12-02 10:45:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 10:45:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-12-02 10:45:57,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2024-12-02 10:45:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:45:57,177 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-12-02 10:45:57,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.421052631578948) internal successors, (84), 17 states have internal predecessors, (84), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:45:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-12-02 10:45:57,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-12-02 10:45:57,180 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-12-02 10:45:57,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:45:57,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 10:45:57,383 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:45:57,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-12-02 10:45:58,238 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 10:45:58,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:45:58 BoogieIcfgContainer [2024-12-02 10:45:58,253 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 10:45:58,254 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 10:45:58,254 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 10:45:58,254 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 10:45:58,255 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:45:42" (3/4) ... [2024-12-02 10:45:58,257 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-12-02 10:45:58,261 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2024-12-02 10:45:58,262 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-12-02 10:45:58,266 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2024-12-02 10:45:58,266 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-12-02 10:45:58,267 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-12-02 10:45:58,267 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-12-02 10:45:58,289 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m == \old(m)) && (m <= 16777215)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) && ((e == \old(e)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431)))) [2024-12-02 10:45:58,289 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((0 == 0) && (((long long) \old(e) + 1) <= e)) && (16777216 <= m)) && (e <= 127)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) [2024-12-02 10:45:58,305 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((0 == 0) && (((long long) \old(e) + 1) <= e)) && (16777216 <= m)) && (e <= 127)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) [2024-12-02 10:45:58,305 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m == \old(m)) && (m <= 16777215)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) && ((e == \old(e)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431)))) [2024-12-02 10:45:58,341 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 10:45:58,341 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 10:45:58,341 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 10:45:58,342 INFO L158 Benchmark]: Toolchain (without parser) took 16026.53ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 117.9MB in the beginning and 159.1MB in the end (delta: -41.2MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,342 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:45:58,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.47ms. Allocated memory is still 142.6MB. Free memory was 117.7MB in the beginning and 104.2MB in the end (delta: 13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,343 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.84ms. Allocated memory is still 142.6MB. Free memory was 104.2MB in the beginning and 102.7MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,343 INFO L158 Benchmark]: Boogie Preprocessor took 34.13ms. Allocated memory is still 142.6MB. Free memory was 102.6MB in the beginning and 100.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:45:58,343 INFO L158 Benchmark]: RCFGBuilder took 375.80ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 81.2MB in the end (delta: 19.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,344 INFO L158 Benchmark]: TraceAbstraction took 15255.55ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 80.7MB in the beginning and 166.2MB in the end (delta: -85.5MB). Peak memory consumption was 98.4MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,344 INFO L158 Benchmark]: Witness Printer took 87.48ms. Allocated memory is still 218.1MB. Free memory was 166.2MB in the beginning and 159.1MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:45:58,345 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 80.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.47ms. Allocated memory is still 142.6MB. Free memory was 117.7MB in the beginning and 104.2MB in the end (delta: 13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.84ms. Allocated memory is still 142.6MB. Free memory was 104.2MB in the beginning and 102.7MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.13ms. Allocated memory is still 142.6MB. Free memory was 102.6MB in the beginning and 100.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 375.80ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 81.2MB in the end (delta: 19.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 15255.55ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 80.7MB in the beginning and 166.2MB in the end (delta: -85.5MB). Peak memory consumption was 98.4MB. Max. memory is 16.1GB. * Witness Printer took 87.48ms. Allocated memory is still 218.1MB. Free memory was 166.2MB in the beginning and 159.1MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.3s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 898 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 890 mSDsluCounter, 10067 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8313 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2774 IncrementalHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 1754 mSDtfsCounter, 2774 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1583 GetRequests, 1353 SyntacticMatches, 5 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=20, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 303 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 2138 NumberOfCodeBlocks, 2105 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 2595 ConstructedInterpolants, 0 QuantifiedInterpolants, 5300 SizeOfPredicates, 11 NumberOfNonLiveVariables, 2846 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 45 InterpolantComputations, 13 PerfectInterpolantSequences, 1260/1536 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((((m == \old(m)) && (m <= 16777215)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431))) && (0 < \old(m))) && ((e == \old(e)) || (((((e <= \old(e)) && ((m % 2) == 0)) && ((m / 2) <= 4294967295)) && (0 <= (m / 2))) && (m <= 33554431)))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((((((0 == 0) && (((long long) \old(e) + 1) <= e)) && (16777216 <= m)) && (e <= 127)) && (\old(m) != 1)) || (((e == \old(e)) && (m == \old(m))) && (16777216 <= m))) && (0 < \old(m))) RESULT: Ultimate proved your program to be correct! [2024-12-02 10:45:58,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd4a35f4-e781-4eaa-92c1-90d3c547f36b/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE