./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.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_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB --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 d2bc2a3f53718ecf47344b6d9b2d76a5698712f748ff03cd831a90a334f72c9d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:54:23,941 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:54:24,052 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:54:24,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:54:24,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:54:24,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:54:24,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:54:24,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:54:24,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:54:24,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:54:24,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:54:24,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:54:24,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:54:24,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:54:24,087 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:54:24,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:54:24,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:54:24,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:54:24,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:54:24,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:54:24,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:54:24,088 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:54:24,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:54:24,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:54:24,089 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:54:24,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:54:24,089 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:54:24,089 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:54:24,090 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:54:24,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:54:24,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:54:24,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:54:24,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:54:24,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:54:24,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:54:24,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:54:24,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:54:24,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:54:24,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:54:24,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:54:24,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:54:24,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:54:24,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:54:24,093 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_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB 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 -> d2bc2a3f53718ecf47344b6d9b2d76a5698712f748ff03cd831a90a334f72c9d [2024-11-28 04:54:24,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:54:24,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:54:24,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:54:24,541 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:54:24,542 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:54:24,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2024-11-28 04:54:28,549 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/data/96a5db9b5/316795ffc78d4114bcf233553f19ebc6/FLAG345ad9c5f [2024-11-28 04:54:28,942 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:54:28,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2024-11-28 04:54:28,966 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/data/96a5db9b5/316795ffc78d4114bcf233553f19ebc6/FLAG345ad9c5f [2024-11-28 04:54:29,134 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/data/96a5db9b5/316795ffc78d4114bcf233553f19ebc6 [2024-11-28 04:54:29,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:54:29,140 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:54:29,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:54:29,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:54:29,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:54:29,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799d09c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29, skipping insertion in model container [2024-11-28 04:54:29,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,175 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:54:29,422 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_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2024-11-28 04:54:29,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:54:29,467 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:54:29,483 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_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2024-11-28 04:54:29,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:54:29,516 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:54:29,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29 WrapperNode [2024-11-28 04:54:29,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:54:29,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:54:29,521 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:54:29,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:54:29,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,574 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-11-28 04:54:29,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:54:29,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:54:29,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:54:29,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:54:29,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,591 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,614 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]. [2024-11-28 04:54:29,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,620 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,633 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:54:29,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:54:29,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:54:29,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:54:29,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (1/1) ... [2024-11-28 04:54:29,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:54:29,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:29,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:54:29,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:54:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:54:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:54:29,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:54:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:54:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:54:29,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:54:29,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:54:29,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:54:29,824 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:54:29,827 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:54:30,049 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 04:54:30,049 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:54:30,065 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:54:30,066 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 04:54:30,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:54:30 BoogieIcfgContainer [2024-11-28 04:54:30,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:54:30,070 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:54:30,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:54:30,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:54:30,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:54:29" (1/3) ... [2024-11-28 04:54:30,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35704b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:54:30, skipping insertion in model container [2024-11-28 04:54:30,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:54:29" (2/3) ... [2024-11-28 04:54:30,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35704b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:54:30, skipping insertion in model container [2024-11-28 04:54:30,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:54:30" (3/3) ... [2024-11-28 04:54:30,082 INFO L128 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound2.c [2024-11-28 04:54:30,109 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:54:30,114 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG prodbin-ll_valuebound2.c that has 3 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-28 04:54:30,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:54:30,210 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;@3c236218, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:54:30,210 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:54:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2024-11-28 04:54:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:54:30,224 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:30,225 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:30,226 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:30,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:30,235 INFO L85 PathProgramCache]: Analyzing trace with hash -6260811, now seen corresponding path program 1 times [2024-11-28 04:54:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26977127] [2024-11-28 04:54:30,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:54:30,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26977127] [2024-11-28 04:54:30,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26977127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:30,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863904371] [2024-11-28 04:54:30,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:30,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:30,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:30,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:54:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:30,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:54:30,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:54:30,561 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:54:30,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863904371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:54:30,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:30,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 04:54:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902812562] [2024-11-28 04:54:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:30,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:54:30,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:30,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:54:30,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:54:30,602 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:54:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:30,630 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2024-11-28 04:54:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:54:30,633 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-28 04:54:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:30,643 INFO L225 Difference]: With dead ends: 49 [2024-11-28 04:54:30,643 INFO L226 Difference]: Without dead ends: 22 [2024-11-28 04:54:30,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:54:30,652 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:30,653 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:54:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-28 04:54:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-28 04:54:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-28 04:54:30,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 23 [2024-11-28 04:54:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:30,707 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-28 04:54:30,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:54:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-28 04:54:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:54:30,710 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:30,711 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:30,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:30,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 04:54:30,912 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:30,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1203610103, now seen corresponding path program 1 times [2024-11-28 04:54:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720417707] [2024-11-28 04:54:30,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375380101] [2024-11-28 04:54:31,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:31,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:31,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:54:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:31,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:54:31,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:54:31,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:54:31,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:31,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720417707] [2024-11-28 04:54:31,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:31,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375380101] [2024-11-28 04:54:31,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375380101] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:31,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:31,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-11-28 04:54:31,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524328710] [2024-11-28 04:54:31,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:31,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:54:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:31,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:54:31,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:54:31,788 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:54:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:31,935 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-28 04:54:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:54:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-11-28 04:54:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:31,937 INFO L225 Difference]: With dead ends: 32 [2024-11-28 04:54:31,937 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 04:54:31,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:54:31,939 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:31,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 04:54:31,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-11-28 04:54:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:54:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-28 04:54:31,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2024-11-28 04:54:31,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:31,961 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-28 04:54:31,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:54:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-28 04:54:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:54:31,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:31,965 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:31,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:32,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:32,170 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:32,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 401861050, now seen corresponding path program 1 times [2024-11-28 04:54:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351757979] [2024-11-28 04:54:32,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:54:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351757979] [2024-11-28 04:54:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351757979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:54:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:54:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:54:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694564942] [2024-11-28 04:54:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:32,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:54:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:32,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:54:32,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:54:32,587 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:54:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:32,693 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-28 04:54:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:54:32,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-28 04:54:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:32,695 INFO L225 Difference]: With dead ends: 37 [2024-11-28 04:54:32,695 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 04:54:32,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:54:32,696 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:32,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 04:54:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-28 04:54:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:54:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 04:54:32,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 29 [2024-11-28 04:54:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:32,704 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 04:54:32,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:54:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 04:54:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:54:32,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:32,706 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:32,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:54:32,706 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:32,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:32,707 INFO L85 PathProgramCache]: Analyzing trace with hash 255967682, now seen corresponding path program 1 times [2024-11-28 04:54:32,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:32,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778407175] [2024-11-28 04:54:32,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:32,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:32,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7552278] [2024-11-28 04:54:32,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:32,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:32,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:32,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:32,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:54:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:32,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:54:32,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:54:33,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:54:35,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778407175] [2024-11-28 04:54:35,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7552278] [2024-11-28 04:54:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7552278] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:54:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-11-28 04:54:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011533332] [2024-11-28 04:54:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:35,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:54:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:35,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:54:35,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:54:35,453 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:54:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:35,774 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-28 04:54:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:54:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-11-28 04:54:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:35,777 INFO L225 Difference]: With dead ends: 39 [2024-11-28 04:54:35,777 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 04:54:35,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:54:35,782 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:35,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:54:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 04:54:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-11-28 04:54:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 04:54:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-28 04:54:35,800 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2024-11-28 04:54:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:35,801 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-28 04:54:35,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:54:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-28 04:54:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:54:35,814 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:35,814 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:35,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:54:36,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:36,015 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:36,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 313225984, now seen corresponding path program 1 times [2024-11-28 04:54:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:36,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320824664] [2024-11-28 04:54:36,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:36,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635608718] [2024-11-28 04:54:36,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:36,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:36,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:54:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:36,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:54:36,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:54:36,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:54:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320824664] [2024-11-28 04:54:37,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635608718] [2024-11-28 04:54:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635608718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:37,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:37,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2024-11-28 04:54:37,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749411948] [2024-11-28 04:54:37,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:37,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:54:37,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:37,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:54:37,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:54:37,782 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:54:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:38,319 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-11-28 04:54:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:54:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 31 [2024-11-28 04:54:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:38,322 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:54:38,323 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 04:54:38,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:54:38,326 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:38,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 121 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:54:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 04:54:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-28 04:54:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:54:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-11-28 04:54:38,348 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 31 [2024-11-28 04:54:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:38,351 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-11-28 04:54:38,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:54:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-11-28 04:54:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:54:38,353 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:38,353 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:38,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:54:38,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:38,555 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:38,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash 3523909, now seen corresponding path program 1 times [2024-11-28 04:54:38,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:38,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196126966] [2024-11-28 04:54:38,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:38,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047650803] [2024-11-28 04:54:38,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:38,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:38,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:38,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:54:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:38,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:54:38,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 04:54:38,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 04:54:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196126966] [2024-11-28 04:54:38,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047650803] [2024-11-28 04:54:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047650803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:38,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:38,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-11-28 04:54:38,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754926420] [2024-11-28 04:54:38,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:38,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:54:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:38,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:54:38,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:54:38,965 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:54:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:39,087 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-11-28 04:54:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:54:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 37 [2024-11-28 04:54:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:39,089 INFO L225 Difference]: With dead ends: 56 [2024-11-28 04:54:39,089 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 04:54:39,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:54:39,095 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:39,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 04:54:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-28 04:54:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:54:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-28 04:54:39,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2024-11-28 04:54:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:39,116 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-28 04:54:39,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:54:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-28 04:54:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:54:39,121 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:39,121 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:39,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:39,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:54:39,322 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:39,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -236677173, now seen corresponding path program 1 times [2024-11-28 04:54:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:39,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083716732] [2024-11-28 04:54:39,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:54:40,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083716732] [2024-11-28 04:54:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083716732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:40,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920751028] [2024-11-28 04:54:40,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:40,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:40,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:40,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:54:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:40,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:54:40,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:54:40,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:54:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920751028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:40,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2024-11-28 04:54:40,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302977484] [2024-11-28 04:54:40,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:40,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:54:40,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:40,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:54:40,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:54:40,698 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:54:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:40,873 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-28 04:54:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:54:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2024-11-28 04:54:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:40,875 INFO L225 Difference]: With dead ends: 62 [2024-11-28 04:54:40,875 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 04:54:40,876 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:54:40,877 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:40,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 04:54:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 04:54:40,879 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) [2024-11-28 04:54:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 04:54:40,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2024-11-28 04:54:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:40,880 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 04:54:40,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-28 04:54:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 04:54:40,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 04:54:40,884 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:54:40,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:41,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:41,094 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:41,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 04:54:41,404 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:54:41,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:54:41 BoogieIcfgContainer [2024-11-28 04:54:41,427 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:54:41,428 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:54:41,428 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:54:41,428 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:54:41,429 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:54:30" (3/4) ... [2024-11-28 04:54:41,433 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 04:54:41,441 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 04:54:41,442 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-28 04:54:41,449 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 04:54:41,450 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-28 04:54:41,450 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 04:54:41,450 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 04:54:41,555 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:54:41,556 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:54:41,556 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:54:41,557 INFO L158 Benchmark]: Toolchain (without parser) took 12417.06ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 95.0MB in the beginning and 60.1MB in the end (delta: 34.9MB). Peak memory consumption was 54.7MB. Max. memory is 16.1GB. [2024-11-28 04:54:41,558 INFO L158 Benchmark]: CDTParser took 1.02ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:54:41,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.36ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 83.8MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:54:41,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.41ms. Allocated memory is still 117.4MB. Free memory was 83.8MB in the beginning and 82.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:54:41,559 INFO L158 Benchmark]: Boogie Preprocessor took 63.97ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 81.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:54:41,560 INFO L158 Benchmark]: RCFGBuilder took 425.52ms. Allocated memory is still 117.4MB. Free memory was 81.3MB in the beginning and 70.7MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:54:41,560 INFO L158 Benchmark]: TraceAbstraction took 11357.39ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 70.4MB in the beginning and 64.4MB in the end (delta: 6.0MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. [2024-11-28 04:54:41,561 INFO L158 Benchmark]: Witness Printer took 128.24ms. Allocated memory is still 142.6MB. Free memory was 64.4MB in the beginning and 60.1MB in the end (delta: 4.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:54:41,563 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 376.36ms. Allocated memory is still 117.4MB. Free memory was 94.7MB in the beginning and 83.8MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.41ms. Allocated memory is still 117.4MB. Free memory was 83.8MB in the beginning and 82.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 63.97ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 81.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 425.52ms. Allocated memory is still 117.4MB. Free memory was 81.3MB in the beginning and 70.7MB in the end (delta: 10.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 11357.39ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 70.4MB in the beginning and 64.4MB in the end (delta: 6.0MB). Peak memory consumption was 29.5MB. Max. memory is 16.1GB. * Witness Printer took 128.24ms. Allocated memory is still 142.6MB. Free memory was 64.4MB in the beginning and 60.1MB in the end (delta: 4.3MB). There was no memory consumed. 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: 15]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 91 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 512 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 379 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 390 IncrementalHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 133 mSDtfsCounter, 390 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 360 GetRequests, 282 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=5, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 397 NumberOfCodeBlocks, 397 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 422 ConstructedInterpolants, 1 QuantifiedInterpolants, 1531 SizeOfPredicates, 9 NumberOfNonLiveVariables, 503 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 223/244 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: 34]: Loop Invariant Derived loop invariant: (((((((((a <= 2) && (b == y)) && (b <= 2)) && (1 <= b)) && (z == 0)) && (0 <= a)) && (a == x)) || ((((((((((y >= 0) ? (y / 2) : ((y / 2) - 1)) <= 0) && (a <= 2)) && (b <= 2)) && (1 <= b)) && ((z + ((__int128) x * y)) == ((long long) a * b))) && (((y >= 0) ? (y % 2) : ((y % 2) + 2)) <= 0)) && (0 <= a)) && (0 <= ((__int128) y + 1)))) || ((((((((y == ((b >= 0) ? (b / 2) : ((b / 2) - 1))) && (a <= 2)) && (b <= 2)) && (1 <= b)) && (x == ((long long) 2 * a))) && (z == 0)) && (0 <= a)) && (((b >= 0) ? (b % 2) : ((b % 2) + 2)) != 1))) RESULT: Ultimate proved your program to be correct! [2024-11-28 04:54:41,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc6c12c4-0741-4c7b-b58a-0343820c4fa3/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE