./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:53:59,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:53:59,762 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:53:59,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:53:59,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:53:59,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:53:59,801 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:53:59,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:53:59,801 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:53:59,801 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:53:59,801 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:53:59,802 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:53:59,802 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:53:59,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:53:59,802 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:53:59,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:53:59,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:53:59,804 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:53:59,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:53:59,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:53:59,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:53:59,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:53:59,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:53:59,808 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:53:59,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:53:59,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:53:59,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:53:59,808 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_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aefc568e9b7c922872a103ac050823e614044aea4bac2f22f2c586f3247176b4 [2024-11-13 15:54:00,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:54:00,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:54:00,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:54:00,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:54:00,120 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:54:00,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c Unable to find full path for "g++" [2024-11-13 15:54:02,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:54:02,264 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:54:02,265 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c [2024-11-13 15:54:02,272 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/data/69dabe5ae/afe423ef41f544628010d4f65834f0ec/FLAGab31c19af [2024-11-13 15:54:02,287 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/data/69dabe5ae/afe423ef41f544628010d4f65834f0ec [2024-11-13 15:54:02,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:54:02,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:54:02,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:54:02,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:54:02,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:54:02,298 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@943e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02, skipping insertion in model container [2024-11-13 15:54:02,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,315 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:54:02,492 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_f8736d2e-411a-4743-8e2b-89d87d623aa0/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2024-11-13 15:54:02,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:54:02,537 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:54:02,548 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_f8736d2e-411a-4743-8e2b-89d87d623aa0/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound50.c[538,551] [2024-11-13 15:54:02,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:54:02,585 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:54:02,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02 WrapperNode [2024-11-13 15:54:02,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:54:02,588 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:54:02,588 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:54:02,588 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:54:02,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,624 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-13 15:54:02,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:54:02,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:54:02,628 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:54:02,628 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:54:02,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,645 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,665 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]. [2024-11-13 15:54:02,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,670 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,681 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,683 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:54:02,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:54:02,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:54:02,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:54:02,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (1/1) ... [2024-11-13 15:54:02,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:54:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:02,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:54:02,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:54:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:54:02,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:54:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:54:02,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:54:02,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 15:54:02,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 15:54:02,838 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:54:02,840 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:54:03,006 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-13 15:54:03,006 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:54:03,017 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:54:03,019 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:54:03,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:54:03 BoogieIcfgContainer [2024-11-13 15:54:03,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:54:03,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:54:03,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:54:03,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:54:03,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:54:02" (1/3) ... [2024-11-13 15:54:03,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13b494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:54:03, skipping insertion in model container [2024-11-13 15:54:03,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:54:02" (2/3) ... [2024-11-13 15:54:03,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e13b494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:54:03, skipping insertion in model container [2024-11-13 15:54:03,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:54:03" (3/3) ... [2024-11-13 15:54:03,030 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.c [2024-11-13 15:54:03,046 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:54:03,048 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_unwindbound50.c that has 2 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 15:54:03,114 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:54:03,128 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;@37b7a1e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:54:03,128 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:54:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-13 15:54:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 15:54:03,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:03,140 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:03,140 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:03,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:03,145 INFO L85 PathProgramCache]: Analyzing trace with hash -743065300, now seen corresponding path program 1 times [2024-11-13 15:54:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:03,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980536066] [2024-11-13 15:54:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:03,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:54:03,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980536066] [2024-11-13 15:54:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980536066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:03,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:03,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:54:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930814011] [2024-11-13 15:54:03,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:03,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 15:54:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 15:54:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 15:54:03,338 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:03,354 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2024-11-13 15:54:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 15:54:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 15:54:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:03,363 INFO L225 Difference]: With dead ends: 53 [2024-11-13 15:54:03,364 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 15:54:03,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 15:54:03,369 INFO L432 NwaCegarLoop]: 38 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, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:03,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:54:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 15:54:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 15:54:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:54:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2024-11-13 15:54:03,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2024-11-13 15:54:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:03,414 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2024-11-13 15:54:03,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2024-11-13 15:54:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 15:54:03,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:03,418 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:03,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:54:03,421 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:03,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:03,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2013546815, now seen corresponding path program 1 times [2024-11-13 15:54:03,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:03,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767828342] [2024-11-13 15:54:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:03,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:54:03,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:03,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767828342] [2024-11-13 15:54:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767828342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:03,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:03,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:03,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933629845] [2024-11-13 15:54:03,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:03,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:03,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:03,620 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:03,705 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2024-11-13 15:54:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 15:54:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:03,707 INFO L225 Difference]: With dead ends: 38 [2024-11-13 15:54:03,707 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 15:54:03,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:03,709 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:03,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:54:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 15:54:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2024-11-13 15:54:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:54:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-13 15:54:03,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2024-11-13 15:54:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:03,720 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-13 15:54:03,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-13 15:54:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 15:54:03,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:03,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:03,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:54:03,722 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:03,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:03,722 INFO L85 PathProgramCache]: Analyzing trace with hash -902337544, now seen corresponding path program 1 times [2024-11-13 15:54:03,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639261291] [2024-11-13 15:54:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:54:03,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639261291] [2024-11-13 15:54:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639261291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:03,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:54:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284996933] [2024-11-13 15:54:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:03,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:54:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:54:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:54:03,864 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:03,898 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-13 15:54:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:54:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 15:54:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:03,903 INFO L225 Difference]: With dead ends: 44 [2024-11-13 15:54:03,903 INFO L226 Difference]: Without dead ends: 30 [2024-11-13 15:54:03,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:54:03,904 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:03,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:54:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-13 15:54:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-13 15:54:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:54:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-11-13 15:54:03,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2024-11-13 15:54:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:03,919 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-11-13 15:54:03,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:54:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-11-13 15:54:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 15:54:03,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:03,921 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:03,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:54:03,921 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:03,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 761098684, now seen corresponding path program 1 times [2024-11-13 15:54:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:03,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985182548] [2024-11-13 15:54:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:04,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:54:04,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985182548] [2024-11-13 15:54:04,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985182548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:04,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:04,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066492317] [2024-11-13 15:54:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:04,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:04,169 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:54:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:04,276 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-11-13 15:54:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-13 15:54:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:04,278 INFO L225 Difference]: With dead ends: 44 [2024-11-13 15:54:04,278 INFO L226 Difference]: Without dead ends: 42 [2024-11-13 15:54:04,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:04,280 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:04,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-13 15:54:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-13 15:54:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:54:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-11-13 15:54:04,294 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2024-11-13 15:54:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:04,294 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-11-13 15:54:04,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:54:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-11-13 15:54:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 15:54:04,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:04,298 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:04,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 15:54:04,298 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:04,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -831687839, now seen corresponding path program 1 times [2024-11-13 15:54:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:04,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195611501] [2024-11-13 15:54:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:04,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193024505] [2024-11-13 15:54:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:04,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:04,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:04,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:54:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:04,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:54:04,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:54:04,559 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:54:04,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:04,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195611501] [2024-11-13 15:54:04,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:04,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193024505] [2024-11-13 15:54:04,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193024505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:04,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:04,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:04,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544844947] [2024-11-13 15:54:04,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:04,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:04,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:04,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:04,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:04,563 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 15:54:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:04,681 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-11-13 15:54:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-13 15:54:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:04,684 INFO L225 Difference]: With dead ends: 63 [2024-11-13 15:54:04,687 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 15:54:04,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:04,688 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:04,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 105 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 15:54:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-13 15:54:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 15:54:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-11-13 15:54:04,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 20 [2024-11-13 15:54:04,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:04,705 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-11-13 15:54:04,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 15:54:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-11-13 15:54:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 15:54:04,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:04,706 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:04,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:54:04,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:04,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:04,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1390753539, now seen corresponding path program 1 times [2024-11-13 15:54:04,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:04,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006751518] [2024-11-13 15:54:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:54:05,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:05,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006751518] [2024-11-13 15:54:05,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006751518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440882973] [2024-11-13 15:54:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:05,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:05,071 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2024-11-13 15:54:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:05,132 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-13 15:54:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 28 [2024-11-13 15:54:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:05,134 INFO L225 Difference]: With dead ends: 67 [2024-11-13 15:54:05,134 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 15:54:05,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:05,135 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:05,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 108 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:54:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 15:54:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-13 15:54:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 15:54:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-11-13 15:54:05,156 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2024-11-13 15:54:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:05,156 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-11-13 15:54:05,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2024-11-13 15:54:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-11-13 15:54:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 15:54:05,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:05,158 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:05,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:54:05,158 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:05,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:05,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1389025661, now seen corresponding path program 1 times [2024-11-13 15:54:05,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:05,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036350668] [2024-11-13 15:54:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886007068] [2024-11-13 15:54:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:05,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:05,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:05,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:54:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:54:05,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:54:05,414 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:54:05,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036350668] [2024-11-13 15:54:05,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886007068] [2024-11-13 15:54:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886007068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:05,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:05,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:05,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116392730] [2024-11-13 15:54:05,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:05,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:05,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:05,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:05,416 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 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) [2024-11-13 15:54:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:05,512 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-13 15:54:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 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 28 [2024-11-13 15:54:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:05,513 INFO L225 Difference]: With dead ends: 73 [2024-11-13 15:54:05,514 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 15:54:05,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:05,514 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:05,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 15:54:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-13 15:54:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 15:54:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-13 15:54:05,539 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2024-11-13 15:54:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:05,539 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-13 15:54:05,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 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) [2024-11-13 15:54:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-13 15:54:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:54:05,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:05,542 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:05,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:54:05,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:05,747 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:05,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:05,747 INFO L85 PathProgramCache]: Analyzing trace with hash -405983045, now seen corresponding path program 1 times [2024-11-13 15:54:05,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:05,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401481561] [2024-11-13 15:54:05,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,870 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,877 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-13 15:54:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:54:05,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401481561] [2024-11-13 15:54:05,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401481561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:05,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437482059] [2024-11-13 15:54:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:05,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:05,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:54:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:05,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:54:05,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 15:54:06,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:54:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437482059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:06,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:54:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-13 15:54:06,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589878735] [2024-11-13 15:54:06,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:06,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:54:06,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:06,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:54:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:54:06,123 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-13 15:54:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:06,322 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2024-11-13 15:54:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:54:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 35 [2024-11-13 15:54:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:06,325 INFO L225 Difference]: With dead ends: 157 [2024-11-13 15:54:06,325 INFO L226 Difference]: Without dead ends: 132 [2024-11-13 15:54:06,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:54:06,329 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:06,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 132 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-13 15:54:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2024-11-13 15:54:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 85 states have internal predecessors, (97), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-13 15:54:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2024-11-13 15:54:06,370 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 35 [2024-11-13 15:54:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:06,371 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2024-11-13 15:54:06,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-13 15:54:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2024-11-13 15:54:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 15:54:06,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:06,372 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:06,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 15:54:06,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:06,572 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:06,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:06,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1815888011, now seen corresponding path program 1 times [2024-11-13 15:54:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:06,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557003006] [2024-11-13 15:54:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:06,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570413547] [2024-11-13 15:54:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:06,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:06,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:06,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:54:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:06,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:54:06,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 15:54:06,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 15:54:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:06,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557003006] [2024-11-13 15:54:06,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:06,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570413547] [2024-11-13 15:54:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570413547] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:54:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-13 15:54:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906370543] [2024-11-13 15:54:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:06,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:54:06,964 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2024-11-13 15:54:08,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 15:54:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:08,461 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2024-11-13 15:54:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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 38 [2024-11-13 15:54:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:08,464 INFO L225 Difference]: With dead ends: 148 [2024-11-13 15:54:08,464 INFO L226 Difference]: Without dead ends: 142 [2024-11-13 15:54:08,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:54:08,465 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:08,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 15:54:08,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-13 15:54:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2024-11-13 15:54:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-13 15:54:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2024-11-13 15:54:08,515 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 38 [2024-11-13 15:54:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:08,515 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2024-11-13 15:54:08,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2024-11-13 15:54:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2024-11-13 15:54:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:54:08,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:08,516 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:08,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:54:08,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:08,717 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:08,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash -855946340, now seen corresponding path program 1 times [2024-11-13 15:54:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520529545] [2024-11-13 15:54:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,879 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:54:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-13 15:54:08,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520529545] [2024-11-13 15:54:08,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520529545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:08,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:54:08,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:54:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431089741] [2024-11-13 15:54:08,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:08,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:08,887 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:54:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:08,963 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2024-11-13 15:54:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:08,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2024-11-13 15:54:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:08,965 INFO L225 Difference]: With dead ends: 139 [2024-11-13 15:54:08,965 INFO L226 Difference]: Without dead ends: 120 [2024-11-13 15:54:08,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:08,966 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:08,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:54:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-13 15:54:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-13 15:54:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 82 states have internal predecessors, (93), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-13 15:54:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2024-11-13 15:54:08,986 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 44 [2024-11-13 15:54:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:08,986 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2024-11-13 15:54:08,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:54:08,986 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2024-11-13 15:54:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:54:08,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:08,988 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:08,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 15:54:08,988 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:08,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash -342408490, now seen corresponding path program 1 times [2024-11-13 15:54:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:08,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119810918] [2024-11-13 15:54:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:08,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,089 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,099 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:54:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,113 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:54:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 15:54:09,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:09,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119810918] [2024-11-13 15:54:09,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119810918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:09,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186714790] [2024-11-13 15:54:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:09,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:09,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:54:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:09,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:54:09,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 15:54:09,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-13 15:54:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186714790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:09,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:54:09,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-13 15:54:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683461658] [2024-11-13 15:54:09,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:09,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:54:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:54:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:54:09,365 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-13 15:54:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:09,627 INFO L93 Difference]: Finished difference Result 243 states and 296 transitions. [2024-11-13 15:54:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:54:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 51 [2024-11-13 15:54:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:09,629 INFO L225 Difference]: With dead ends: 243 [2024-11-13 15:54:09,629 INFO L226 Difference]: Without dead ends: 222 [2024-11-13 15:54:09,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:54:09,630 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:09,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 185 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:54:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-13 15:54:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2024-11-13 15:54:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 149 states have internal predecessors, (167), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-13 15:54:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 261 transitions. [2024-11-13 15:54:09,679 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 261 transitions. Word has length 51 [2024-11-13 15:54:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:09,679 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 261 transitions. [2024-11-13 15:54:09,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-13 15:54:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 261 transitions. [2024-11-13 15:54:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 15:54:09,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:09,685 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:09,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 15:54:09,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:09,890 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:09,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1735124633, now seen corresponding path program 1 times [2024-11-13 15:54:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35269490] [2024-11-13 15:54:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337478622] [2024-11-13 15:54:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:09,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:09,934 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:09,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:54:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:10,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 15:54:10,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-13 15:54:10,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-13 15:54:13,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:13,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35269490] [2024-11-13 15:54:13,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:13,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337478622] [2024-11-13 15:54:13,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337478622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:13,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:54:13,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-13 15:54:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527471928] [2024-11-13 15:54:13,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:13,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:54:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:54:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:54:13,818 INFO L87 Difference]: Start difference. First operand 215 states and 261 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-13 15:54:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:15,768 INFO L93 Difference]: Finished difference Result 379 states and 486 transitions. [2024-11-13 15:54:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 15:54:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2024-11-13 15:54:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:15,771 INFO L225 Difference]: With dead ends: 379 [2024-11-13 15:54:15,773 INFO L226 Difference]: Without dead ends: 303 [2024-11-13 15:54:15,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:54:15,776 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 118 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:15,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 361 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:54:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-13 15:54:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 265. [2024-11-13 15:54:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 178 states have (on average 1.202247191011236) internal successors, (214), 187 states have internal predecessors, (214), 55 states have call successors, (55), 31 states have call predecessors, (55), 31 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-13 15:54:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 321 transitions. [2024-11-13 15:54:15,852 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 321 transitions. Word has length 60 [2024-11-13 15:54:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:15,853 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 321 transitions. [2024-11-13 15:54:15,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-13 15:54:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 321 transitions. [2024-11-13 15:54:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 15:54:15,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:15,857 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:15,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:54:16,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:16,061 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:16,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1956337099, now seen corresponding path program 1 times [2024-11-13 15:54:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:16,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82611271] [2024-11-13 15:54:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:16,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580438971] [2024-11-13 15:54:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:16,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:16,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:54:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:16,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 15:54:16,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 15:54:16,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 15:54:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82611271] [2024-11-13 15:54:17,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580438971] [2024-11-13 15:54:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580438971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:17,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:54:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-13 15:54:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493096539] [2024-11-13 15:54:17,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:17,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 15:54:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 15:54:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:54:17,906 INFO L87 Difference]: Start difference. First operand 265 states and 321 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-13 15:54:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:18,883 INFO L93 Difference]: Finished difference Result 389 states and 483 transitions. [2024-11-13 15:54:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:54:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 71 [2024-11-13 15:54:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:18,890 INFO L225 Difference]: With dead ends: 389 [2024-11-13 15:54:18,890 INFO L226 Difference]: Without dead ends: 320 [2024-11-13 15:54:18,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-11-13 15:54:18,892 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 73 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:18,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 509 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:54:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-13 15:54:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2024-11-13 15:54:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 188 states have internal predecessors, (220), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-13 15:54:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 329 transitions. [2024-11-13 15:54:18,975 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 329 transitions. Word has length 71 [2024-11-13 15:54:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:18,976 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 329 transitions. [2024-11-13 15:54:18,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-13 15:54:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 329 transitions. [2024-11-13 15:54:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 15:54:18,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:18,978 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:18,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:54:19,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:19,179 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:19,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:19,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1082365573, now seen corresponding path program 2 times [2024-11-13 15:54:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:19,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223068586] [2024-11-13 15:54:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:19,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:54:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:54:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,480 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:54:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-13 15:54:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-13 15:54:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 15:54:19,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:19,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223068586] [2024-11-13 15:54:19,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223068586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445668034] [2024-11-13 15:54:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:54:19,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:19,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:19,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:54:19,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:54:19,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:54:19,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:54:19,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 15:54:19,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 15:54:19,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445668034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:19,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:54:19,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-13 15:54:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411580987] [2024-11-13 15:54:19,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:19,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:19,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:19,776 INFO L87 Difference]: Start difference. First operand 271 states and 329 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-13 15:54:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:19,891 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2024-11-13 15:54:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:54:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 74 [2024-11-13 15:54:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:19,894 INFO L225 Difference]: With dead ends: 309 [2024-11-13 15:54:19,894 INFO L226 Difference]: Without dead ends: 256 [2024-11-13 15:54:19,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:54:19,895 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:19,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 131 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-13 15:54:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 248. [2024-11-13 15:54:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 169 states have (on average 1.183431952662722) internal successors, (200), 172 states have internal predecessors, (200), 49 states have call successors, (49), 30 states have call predecessors, (49), 29 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-13 15:54:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 296 transitions. [2024-11-13 15:54:19,972 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 296 transitions. Word has length 74 [2024-11-13 15:54:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:19,972 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 296 transitions. [2024-11-13 15:54:19,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-13 15:54:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 296 transitions. [2024-11-13 15:54:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-13 15:54:19,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:19,973 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:19,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:54:20,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:20,174 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:20,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1337253966, now seen corresponding path program 1 times [2024-11-13 15:54:20,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:20,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144429412] [2024-11-13 15:54:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:20,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:54:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:54:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:54:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-13 15:54:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-13 15:54:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-13 15:54:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-13 15:54:20,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:20,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144429412] [2024-11-13 15:54:20,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144429412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:20,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408840370] [2024-11-13 15:54:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:20,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:20,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:20,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:54:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:20,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 15:54:20,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-13 15:54:21,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-13 15:54:21,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408840370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:21,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:54:21,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-13 15:54:21,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003343568] [2024-11-13 15:54:21,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:21,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 15:54:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 15:54:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:54:21,613 INFO L87 Difference]: Start difference. First operand 248 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-13 15:54:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:22,211 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2024-11-13 15:54:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:54:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 76 [2024-11-13 15:54:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:22,214 INFO L225 Difference]: With dead ends: 264 [2024-11-13 15:54:22,214 INFO L226 Difference]: Without dead ends: 239 [2024-11-13 15:54:22,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:54:22,217 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:22,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 385 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:54:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-13 15:54:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 229. [2024-11-13 15:54:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 159 states have internal predecessors, (186), 45 states have call successors, (45), 28 states have call predecessors, (45), 27 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-13 15:54:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2024-11-13 15:54:22,280 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 76 [2024-11-13 15:54:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:22,281 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2024-11-13 15:54:22,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 15 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-13 15:54:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2024-11-13 15:54:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-13 15:54:22,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:22,282 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:22,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:54:22,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 15:54:22,483 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:22,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1025143664, now seen corresponding path program 1 times [2024-11-13 15:54:22,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:22,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295656089] [2024-11-13 15:54:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:22,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:54:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:54:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:54:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 15:54:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 15:54:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 15:54:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-13 15:54:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-13 15:54:22,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:22,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295656089] [2024-11-13 15:54:22,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295656089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:22,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106444893] [2024-11-13 15:54:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:22,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:22,631 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:22,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:54:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:22,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 15:54:22,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-13 15:54:22,748 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:54:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106444893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:54:22,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:54:22,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-13 15:54:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691992988] [2024-11-13 15:54:22,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:54:22,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:54:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:54:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:22,749 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-13 15:54:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:22,872 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2024-11-13 15:54:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:54:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 80 [2024-11-13 15:54:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:22,874 INFO L225 Difference]: With dead ends: 250 [2024-11-13 15:54:22,874 INFO L226 Difference]: Without dead ends: 230 [2024-11-13 15:54:22,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:54:22,875 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:22,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 109 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:54:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-13 15:54:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-11-13 15:54:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.1578947368421053) internal successors, (176), 154 states have internal predecessors, (176), 43 states have call successors, (43), 26 states have call predecessors, (43), 26 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-13 15:54:22,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2024-11-13 15:54:22,934 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 80 [2024-11-13 15:54:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:22,934 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2024-11-13 15:54:22,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-13 15:54:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2024-11-13 15:54:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 15:54:22,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:22,936 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:22,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:54:23,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 15:54:23,136 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:23,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 132948015, now seen corresponding path program 3 times [2024-11-13 15:54:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:23,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294172549] [2024-11-13 15:54:23,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:23,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725848737] [2024-11-13 15:54:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:54:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:23,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:23,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:23,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:54:23,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 15:54:23,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:54:23,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 15:54:23,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-13 15:54:24,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-13 15:54:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294172549] [2024-11-13 15:54:44,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:44,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725848737] [2024-11-13 15:54:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725848737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:44,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:54:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2024-11-13 15:54:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304057455] [2024-11-13 15:54:44,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:44,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 15:54:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 15:54:44,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:54:44,754 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-13 15:54:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:51,961 INFO L93 Difference]: Finished difference Result 296 states and 378 transitions. [2024-11-13 15:54:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:54:51,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 92 [2024-11-13 15:54:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:51,964 INFO L225 Difference]: With dead ends: 296 [2024-11-13 15:54:51,964 INFO L226 Difference]: Without dead ends: 272 [2024-11-13 15:54:51,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-13 15:54:51,966 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 123 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 154 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:51,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 560 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 563 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 15:54:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-13 15:54:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 250. [2024-11-13 15:54:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 168 states have (on average 1.1845238095238095) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 27 states have call predecessors, (54), 27 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-11-13 15:54:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 306 transitions. [2024-11-13 15:54:52,034 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 306 transitions. Word has length 92 [2024-11-13 15:54:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:52,035 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 306 transitions. [2024-11-13 15:54:52,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-13 15:54:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 306 transitions. [2024-11-13 15:54:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-13 15:54:52,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:52,036 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:52,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:54:52,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 15:54:52,241 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:52,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1474901708, now seen corresponding path program 1 times [2024-11-13 15:54:52,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:52,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580895521] [2024-11-13 15:54:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:52,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:54:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:54:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:54:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:54:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:54:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:54:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:54:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:54:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 15:54:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 15:54:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 15:54:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 15:54:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,487 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-11-13 15:54:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-11-13 15:54:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-13 15:54:52,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580895521] [2024-11-13 15:54:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580895521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:52,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593116987] [2024-11-13 15:54:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:52,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:52,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:54:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:52,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:54:52,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-13 15:54:52,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-11-13 15:54:52,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593116987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:54:52,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:54:52,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-13 15:54:52,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849044759] [2024-11-13 15:54:52,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:52,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:54:52,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:52,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:54:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:54:52,865 INFO L87 Difference]: Start difference. First operand 250 states and 306 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-13 15:54:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:53,366 INFO L93 Difference]: Finished difference Result 632 states and 806 transitions. [2024-11-13 15:54:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:54:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 98 [2024-11-13 15:54:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:53,370 INFO L225 Difference]: With dead ends: 632 [2024-11-13 15:54:53,370 INFO L226 Difference]: Without dead ends: 537 [2024-11-13 15:54:53,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:54:53,372 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 159 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:53,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 192 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:54:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2024-11-13 15:54:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 516. [2024-11-13 15:54:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 337 states have (on average 1.2166172106824926) internal successors, (410), 361 states have internal predecessors, (410), 120 states have call successors, (120), 58 states have call predecessors, (120), 58 states have return successors, (115), 96 states have call predecessors, (115), 115 states have call successors, (115) [2024-11-13 15:54:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 645 transitions. [2024-11-13 15:54:53,535 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 645 transitions. Word has length 98 [2024-11-13 15:54:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:53,536 INFO L471 AbstractCegarLoop]: Abstraction has 516 states and 645 transitions. [2024-11-13 15:54:53,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-11-13 15:54:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 645 transitions. [2024-11-13 15:54:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 15:54:53,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:53,537 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:53,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:54:53,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 15:54:53,742 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:53,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -271079757, now seen corresponding path program 1 times [2024-11-13 15:54:53,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455362100] [2024-11-13 15:54:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:53,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620461915] [2024-11-13 15:54:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:53,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:53,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:53,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:53,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:54:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:54:53,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 15:54:53,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:54:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 58 proven. 84 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-13 15:54:55,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:54:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:54:57,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455362100] [2024-11-13 15:54:57,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:54:57,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620461915] [2024-11-13 15:54:57,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620461915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:54:57,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:54:57,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-13 15:54:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417787055] [2024-11-13 15:54:57,723 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 15:54:57,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:54:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:54:57,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:54:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:54:57,724 INFO L87 Difference]: Start difference. First operand 516 states and 645 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-13 15:54:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:54:58,493 INFO L93 Difference]: Finished difference Result 528 states and 656 transitions. [2024-11-13 15:54:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:54:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2024-11-13 15:54:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:54:58,497 INFO L225 Difference]: With dead ends: 528 [2024-11-13 15:54:58,497 INFO L226 Difference]: Without dead ends: 526 [2024-11-13 15:54:58,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:54:58,498 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:54:58,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:54:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2024-11-13 15:54:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 525. [2024-11-13 15:54:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 343 states have (on average 1.2128279883381925) internal successors, (416), 368 states have internal predecessors, (416), 121 states have call successors, (121), 60 states have call predecessors, (121), 60 states have return successors, (116), 96 states have call predecessors, (116), 116 states have call successors, (116) [2024-11-13 15:54:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 653 transitions. [2024-11-13 15:54:58,623 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 653 transitions. Word has length 103 [2024-11-13 15:54:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:54:58,623 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 653 transitions. [2024-11-13 15:54:58,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-13 15:54:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 653 transitions. [2024-11-13 15:54:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-13 15:54:58,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:54:58,624 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:54:58,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:54:58,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:58,831 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:54:58,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:54:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1723064949, now seen corresponding path program 2 times [2024-11-13 15:54:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:54:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063257776] [2024-11-13 15:54:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:54:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:54:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:54:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270165916] [2024-11-13 15:54:58,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:54:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:54:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:54:58,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:54:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:54:58,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:54:58,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:54:58,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 15:54:58,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:55:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2024-11-13 15:55:00,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:55:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:55:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063257776] [2024-11-13 15:55:00,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 15:55:00,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270165916] [2024-11-13 15:55:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270165916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:55:00,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:55:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-13 15:55:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061614343] [2024-11-13 15:55:00,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 15:55:00,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:55:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:55:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:55:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:55:00,914 INFO L87 Difference]: Start difference. First operand 525 states and 653 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-13 15:55:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:55:01,570 INFO L93 Difference]: Finished difference Result 608 states and 755 transitions. [2024-11-13 15:55:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:55:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2024-11-13 15:55:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:55:01,573 INFO L225 Difference]: With dead ends: 608 [2024-11-13 15:55:01,573 INFO L226 Difference]: Without dead ends: 528 [2024-11-13 15:55:01,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:55:01,574 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:55:01,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 505 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:55:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2024-11-13 15:55:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 520. [2024-11-13 15:55:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 342 states have (on average 1.1988304093567252) internal successors, (410), 364 states have internal predecessors, (410), 116 states have call successors, (116), 62 states have call predecessors, (116), 61 states have return successors, (111), 93 states have call predecessors, (111), 111 states have call successors, (111) [2024-11-13 15:55:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 637 transitions. [2024-11-13 15:55:01,728 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 637 transitions. Word has length 103 [2024-11-13 15:55:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:55:01,728 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 637 transitions. [2024-11-13 15:55:01,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-11-13 15:55:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 637 transitions. [2024-11-13 15:55:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-13 15:55:01,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:55:01,730 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:55:01,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 15:55:01,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:55:01,934 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:55:01,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:55:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -366665782, now seen corresponding path program 1 times [2024-11-13 15:55:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:55:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745824004] [2024-11-13 15:55:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:55:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:55:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:55:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:55:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:55:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:55:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:55:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,442 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:55:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:55:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 15:55:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 15:55:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 15:55:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-13 15:55:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-13 15:55:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-13 15:55:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-11-13 15:55:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-11-13 15:55:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-13 15:55:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:55:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745824004] [2024-11-13 15:55:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745824004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:55:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315873182] [2024-11-13 15:55:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:02,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:55:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:55:02,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:55:02,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:55:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:02,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 15:55:02,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:55:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 31 proven. 80 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-13 15:55:03,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:55:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 31 proven. 80 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-13 15:55:04,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315873182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:55:04,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:55:04,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-11-13 15:55:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547553909] [2024-11-13 15:55:04,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:55:04,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:55:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:55:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:55:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:55:04,287 INFO L87 Difference]: Start difference. First operand 520 states and 637 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-13 15:55:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:55:05,026 INFO L93 Difference]: Finished difference Result 541 states and 670 transitions. [2024-11-13 15:55:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:55:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) Word has length 108 [2024-11-13 15:55:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:55:05,030 INFO L225 Difference]: With dead ends: 541 [2024-11-13 15:55:05,030 INFO L226 Difference]: Without dead ends: 483 [2024-11-13 15:55:05,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 15:55:05,031 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:55:05,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 424 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:55:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-11-13 15:55:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 468. [2024-11-13 15:55:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 306 states have (on average 1.2156862745098038) internal successors, (372), 327 states have internal predecessors, (372), 107 states have call successors, (107), 54 states have call predecessors, (107), 54 states have return successors, (103), 86 states have call predecessors, (103), 103 states have call successors, (103) [2024-11-13 15:55:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 582 transitions. [2024-11-13 15:55:05,156 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 582 transitions. Word has length 108 [2024-11-13 15:55:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:55:05,157 INFO L471 AbstractCegarLoop]: Abstraction has 468 states and 582 transitions. [2024-11-13 15:55:05,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-13 15:55:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 582 transitions. [2024-11-13 15:55:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-13 15:55:05,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:55:05,159 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:55:05,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 15:55:05,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 15:55:05,363 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:55:05,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:55:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 559705173, now seen corresponding path program 1 times [2024-11-13 15:55:05,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:55:05,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823818402] [2024-11-13 15:55:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:05,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:55:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:55:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:55:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:55:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:55:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:55:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:55:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:55:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:55:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 15:55:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 15:55:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 15:55:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 15:55:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 15:55:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,635 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-13 15:55:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-13 15:55:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 15:55:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-13 15:55:05,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:55:05,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823818402] [2024-11-13 15:55:05,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823818402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:55:05,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923404332] [2024-11-13 15:55:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:05,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:55:05,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:55:05,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:55:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:55:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:05,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:55:05,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:55:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-13 15:55:05,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:55:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-11-13 15:55:06,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923404332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:55:06,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:55:06,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-13 15:55:06,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284532373] [2024-11-13 15:55:06,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:55:06,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:55:06,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:55:06,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:55:06,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:55:06,109 INFO L87 Difference]: Start difference. First operand 468 states and 582 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-13 15:55:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:55:06,894 INFO L93 Difference]: Finished difference Result 842 states and 1077 transitions. [2024-11-13 15:55:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:55:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 110 [2024-11-13 15:55:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:55:06,899 INFO L225 Difference]: With dead ends: 842 [2024-11-13 15:55:06,899 INFO L226 Difference]: Without dead ends: 796 [2024-11-13 15:55:06,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:55:06,902 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 214 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:55:06,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 254 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:55:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-13 15:55:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 781. [2024-11-13 15:55:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 519 states have (on average 1.163776493256262) internal successors, (604), 551 states have internal predecessors, (604), 182 states have call successors, (182), 79 states have call predecessors, (182), 79 states have return successors, (174), 150 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-13 15:55:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 960 transitions. [2024-11-13 15:55:07,164 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 960 transitions. Word has length 110 [2024-11-13 15:55:07,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:55:07,164 INFO L471 AbstractCegarLoop]: Abstraction has 781 states and 960 transitions. [2024-11-13 15:55:07,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-13 15:55:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 960 transitions. [2024-11-13 15:55:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-13 15:55:07,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:55:07,166 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:55:07,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:55:07,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 15:55:07,371 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:55:07,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:55:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1908487497, now seen corresponding path program 2 times [2024-11-13 15:55:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:55:07,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775380941] [2024-11-13 15:55:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:55:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 15:55:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:55:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 15:55:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 15:55:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 15:55:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 15:55:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 15:55:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 15:55:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 15:55:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 15:55:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 15:55:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 15:55:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 15:55:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-13 15:55:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-13 15:55:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 15:55:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-13 15:55:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-11-13 15:55:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 54 proven. 34 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-13 15:55:07,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:55:07,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775380941] [2024-11-13 15:55:07,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775380941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:55:07,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600718356] [2024-11-13 15:55:07,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:55:07,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:55:07,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:55:07,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:55:07,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:55:07,757 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:55:07,757 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:55:07,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:55:07,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:55:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-13 15:55:07,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:55:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-11-13 15:55:08,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600718356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:55:08,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:55:08,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-11-13 15:55:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893499368] [2024-11-13 15:55:08,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:55:08,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:55:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:55:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:55:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:55:08,056 INFO L87 Difference]: Start difference. First operand 781 states and 960 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-13 15:55:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:55:08,435 INFO L93 Difference]: Finished difference Result 857 states and 1065 transitions. [2024-11-13 15:55:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:55:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 121 [2024-11-13 15:55:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:55:08,440 INFO L225 Difference]: With dead ends: 857 [2024-11-13 15:55:08,440 INFO L226 Difference]: Without dead ends: 802 [2024-11-13 15:55:08,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 271 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:55:08,441 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 15 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:55:08,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 237 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:55:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2024-11-13 15:55:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 784. [2024-11-13 15:55:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 527 states have (on average 1.1537001897533208) internal successors, (608), 542 states have internal predecessors, (608), 178 states have call successors, (178), 78 states have call predecessors, (178), 78 states have return successors, (171), 163 states have call predecessors, (171), 171 states have call successors, (171) [2024-11-13 15:55:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 957 transitions. [2024-11-13 15:55:08,683 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 957 transitions. Word has length 121 [2024-11-13 15:55:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:55:08,683 INFO L471 AbstractCegarLoop]: Abstraction has 784 states and 957 transitions. [2024-11-13 15:55:08,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 8 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-11-13 15:55:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 957 transitions. [2024-11-13 15:55:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-13 15:55:08,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:55:08,685 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:55:08,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 15:55:08,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 15:55:08,886 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:55:08,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:55:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1524014663, now seen corresponding path program 1 times [2024-11-13 15:55:08,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:55:08,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294666585] [2024-11-13 15:55:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:08,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:55:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 15:55:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408494398] [2024-11-13 15:55:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:55:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:55:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:55:08,928 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:55:08,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:55:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:55:09,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 15:55:09,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:55:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-13 15:55:10,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:56:23,161 WARN L286 SmtUtils]: Spent 15.67s on a formula simplification that was a NOOP. DAG size: 380 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 15:58:24,292 WARN L286 SmtUtils]: Spent 15.55s on a formula simplification that was a NOOP. DAG size: 377 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:00:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-13 16:00:16,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:00:16,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294666585] [2024-11-13 16:00:16,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:00:16,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408494398] [2024-11-13 16:00:16,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408494398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:00:16,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:00:16,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2024-11-13 16:00:16,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944884395] [2024-11-13 16:00:16,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:00:16,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 16:00:16,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:00:16,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 16:00:16,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:00:16,375 INFO L87 Difference]: Start difference. First operand 784 states and 957 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 17 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2024-11-13 16:00:35,791 WARN L286 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 572 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:00:38,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:00:39,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:00:41,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:00:55,435 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 146 DAG size of output: 81 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:01:23,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:01:24,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:01:47,384 WARN L286 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 168 DAG size of output: 88 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:01:57,356 WARN L286 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 249 DAG size of output: 50 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:01:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:01:59,097 INFO L93 Difference]: Finished difference Result 1268 states and 1640 transitions. [2024-11-13 16:01:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 16:01:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 17 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) Word has length 124 [2024-11-13 16:01:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:01:59,104 INFO L225 Difference]: With dead ends: 1268 [2024-11-13 16:01:59,104 INFO L226 Difference]: Without dead ends: 1092 [2024-11-13 16:01:59,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 123.1s TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 16:01:59,106 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 128 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:01:59,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1033 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 20.5s Time] [2024-11-13 16:01:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-11-13 16:01:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1028. [2024-11-13 16:01:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 693 states have (on average 1.1861471861471862) internal successors, (822), 724 states have internal predecessors, (822), 242 states have call successors, (242), 92 states have call predecessors, (242), 92 states have return successors, (235), 211 states have call predecessors, (235), 235 states have call successors, (235) [2024-11-13 16:01:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1299 transitions. [2024-11-13 16:01:59,613 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1299 transitions. Word has length 124 [2024-11-13 16:01:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:01:59,614 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1299 transitions. [2024-11-13 16:01:59,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 17 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 15 states have call successors, (36) [2024-11-13 16:01:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1299 transitions. [2024-11-13 16:01:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-13 16:01:59,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:01:59,616 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:01:59,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 16:01:59,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 16:01:59,821 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:01:59,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:01:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash -603297381, now seen corresponding path program 3 times [2024-11-13 16:01:59,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:01:59,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562603449] [2024-11-13 16:01:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:01:59,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:01:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:01:59,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714619605] [2024-11-13 16:01:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:01:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:01:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:01:59,874 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:01:59,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:01:59,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 16:01:59,950 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:01:59,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:01:59,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 166 proven. 53 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2024-11-13 16:02:00,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2024-11-13 16:02:00,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562603449] [2024-11-13 16:02:00,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:02:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714619605] [2024-11-13 16:02:00,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714619605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:00,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:02:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-11-13 16:02:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272936984] [2024-11-13 16:02:00,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:00,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 16:02:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 16:02:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:02:00,477 INFO L87 Difference]: Start difference. First operand 1028 states and 1299 transitions. Second operand has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-13 16:02:02,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:02,051 INFO L93 Difference]: Finished difference Result 1105 states and 1372 transitions. [2024-11-13 16:02:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:02:02,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 135 [2024-11-13 16:02:02,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:02,056 INFO L225 Difference]: With dead ends: 1105 [2024-11-13 16:02:02,058 INFO L226 Difference]: Without dead ends: 1101 [2024-11-13 16:02:02,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:02:02,060 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:02,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 188 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:02:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-11-13 16:02:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1081. [2024-11-13 16:02:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 734 states have (on average 1.1716621253405994) internal successors, (860), 764 states have internal predecessors, (860), 240 states have call successors, (240), 107 states have call predecessors, (240), 106 states have return successors, (233), 209 states have call predecessors, (233), 233 states have call successors, (233) [2024-11-13 16:02:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1333 transitions. [2024-11-13 16:02:02,701 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1333 transitions. Word has length 135 [2024-11-13 16:02:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:02,702 INFO L471 AbstractCegarLoop]: Abstraction has 1081 states and 1333 transitions. [2024-11-13 16:02:02,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-13 16:02:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1333 transitions. [2024-11-13 16:02:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-13 16:02:02,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:02,721 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:02,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 16:02:02,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:02,922 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:02,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash -561756749, now seen corresponding path program 2 times [2024-11-13 16:02:02,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:02,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248032895] [2024-11-13 16:02:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 16:02:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:02:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 16:02:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:02:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 16:02:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:02:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 16:02:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:02:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 16:02:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 16:02:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:02:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 16:02:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 16:02:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-13 16:02:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-13 16:02:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 16:02:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-13 16:02:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-11-13 16:02:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-11-13 16:02:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-11-13 16:02:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 55 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-11-13 16:02:03,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:03,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248032895] [2024-11-13 16:02:03,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248032895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:03,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283872848] [2024-11-13 16:02:03,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:03,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:03,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:02:03,483 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:02:03,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:03,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 16:02:03,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 55 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-11-13 16:02:03,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 55 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-11-13 16:02:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283872848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:03,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2024-11-13 16:02:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372463824] [2024-11-13 16:02:03,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:03,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:02:03,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:02:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:02:03,965 INFO L87 Difference]: Start difference. First operand 1081 states and 1333 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 8 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2024-11-13 16:02:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:04,447 INFO L93 Difference]: Finished difference Result 1261 states and 1545 transitions. [2024-11-13 16:02:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:02:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 8 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) Word has length 138 [2024-11-13 16:02:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:04,452 INFO L225 Difference]: With dead ends: 1261 [2024-11-13 16:02:04,452 INFO L226 Difference]: Without dead ends: 958 [2024-11-13 16:02:04,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:02:04,454 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:04,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 355 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-11-13 16:02:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 951. [2024-11-13 16:02:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 645 states have (on average 1.1317829457364341) internal successors, (730), 672 states have internal predecessors, (730), 199 states have call successors, (199), 107 states have call predecessors, (199), 106 states have return successors, (192), 171 states have call predecessors, (192), 192 states have call successors, (192) [2024-11-13 16:02:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1121 transitions. [2024-11-13 16:02:04,947 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1121 transitions. Word has length 138 [2024-11-13 16:02:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:04,949 INFO L471 AbstractCegarLoop]: Abstraction has 951 states and 1121 transitions. [2024-11-13 16:02:04,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 8 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 7 states have call predecessors, (35), 7 states have call successors, (35) [2024-11-13 16:02:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1121 transitions. [2024-11-13 16:02:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-13 16:02:04,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:04,952 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:04,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 16:02:05,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:02:05,153 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:05,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:05,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1698688482, now seen corresponding path program 2 times [2024-11-13 16:02:05,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501107646] [2024-11-13 16:02:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 16:02:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:02:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 16:02:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:02:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 16:02:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:02:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,886 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 16:02:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:02:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 16:02:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 16:02:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:02:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 16:02:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 16:02:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-13 16:02:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-13 16:02:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-11-13 16:02:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-11-13 16:02:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,937 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-11-13 16:02:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-11-13 16:02:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,946 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-11-13 16:02:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-11-13 16:02:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 42 proven. 69 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-11-13 16:02:05,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:05,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501107646] [2024-11-13 16:02:05,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501107646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:05,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535336137] [2024-11-13 16:02:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:05,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:05,957 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:05,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 16:02:06,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:02:06,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:06,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:02:06,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 100 proven. 71 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-13 16:02:06,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2024-11-13 16:02:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535336137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:06,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 19 [2024-11-13 16:02:06,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607813816] [2024-11-13 16:02:06,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:06,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:02:06,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:06,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:02:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:02:06,390 INFO L87 Difference]: Start difference. First operand 951 states and 1121 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-13 16:02:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:07,618 INFO L93 Difference]: Finished difference Result 996 states and 1165 transitions. [2024-11-13 16:02:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:02:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 140 [2024-11-13 16:02:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:07,623 INFO L225 Difference]: With dead ends: 996 [2024-11-13 16:02:07,623 INFO L226 Difference]: Without dead ends: 857 [2024-11-13 16:02:07,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:02:07,624 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 98 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:07,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 655 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:02:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2024-11-13 16:02:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 847. [2024-11-13 16:02:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 577 states have (on average 1.117850953206239) internal successors, (645), 604 states have internal predecessors, (645), 175 states have call successors, (175), 94 states have call predecessors, (175), 94 states have return successors, (174), 148 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-13 16:02:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 994 transitions. [2024-11-13 16:02:08,069 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 994 transitions. Word has length 140 [2024-11-13 16:02:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:08,070 INFO L471 AbstractCegarLoop]: Abstraction has 847 states and 994 transitions. [2024-11-13 16:02:08,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-13 16:02:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 994 transitions. [2024-11-13 16:02:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-13 16:02:08,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:08,072 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:08,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 16:02:08,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 16:02:08,273 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:08,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:08,273 INFO L85 PathProgramCache]: Analyzing trace with hash 993738351, now seen corresponding path program 4 times [2024-11-13 16:02:08,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:08,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820982753] [2024-11-13 16:02:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:02:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054816821] [2024-11-13 16:02:08,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:02:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:08,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:02:08,445 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:02:08,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:08,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 16:02:08,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 77 proven. 112 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-13 16:02:09,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:44,871 WARN L286 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 384 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:04:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 77 proven. 112 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-13 16:04:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820982753] [2024-11-13 16:04:29,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:04:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054816821] [2024-11-13 16:04:29,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054816821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:29,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:04:29,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2024-11-13 16:04:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819790558] [2024-11-13 16:04:29,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:29,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 16:04:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 16:04:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:04:29,637 INFO L87 Difference]: Start difference. First operand 847 states and 994 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 31 states have internal predecessors, (76), 19 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) [2024-11-13 16:04:49,504 WARN L286 SmtUtils]: Spent 18.42s on a formula simplification. DAG size of input: 609 DAG size of output: 61 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:04:53,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:04:55,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:04:59,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:05:01,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:05:05,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:05:14,583 WARN L286 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 356 DAG size of output: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:05:28,698 WARN L286 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 356 DAG size of output: 63 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:05:41,551 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 200 DAG size of output: 60 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:05:56,998 WARN L286 SmtUtils]: Spent 9.35s on a formula simplification. DAG size of input: 286 DAG size of output: 51 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:05:59,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:03,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:07,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:10,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:16,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:22,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:06:56,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:00,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:03,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:05,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:08,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:12,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:17,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 16:07:35,090 WARN L286 SmtUtils]: Spent 15.41s on a formula simplification. DAG size of input: 163 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:07:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:07:35,102 INFO L93 Difference]: Finished difference Result 1010 states and 1231 transitions. [2024-11-13 16:07:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 16:07:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 31 states have internal predecessors, (76), 19 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) Word has length 142 [2024-11-13 16:07:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:07:35,107 INFO L225 Difference]: With dead ends: 1010 [2024-11-13 16:07:35,107 INFO L226 Difference]: Without dead ends: 1008 [2024-11-13 16:07:35,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 128.9s TimeCoverageRelationStatistics Valid=679, Invalid=2291, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 16:07:35,108 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 315 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:07:35,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1031 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 935 Invalid, 6 Unknown, 0 Unchecked, 70.4s Time] [2024-11-13 16:07:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2024-11-13 16:07:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 897. [2024-11-13 16:07:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 615 states have (on average 1.1219512195121952) internal successors, (690), 644 states have internal predecessors, (690), 185 states have call successors, (185), 96 states have call predecessors, (185), 96 states have return successors, (184), 156 states have call predecessors, (184), 184 states have call successors, (184) [2024-11-13 16:07:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1059 transitions. [2024-11-13 16:07:35,700 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1059 transitions. Word has length 142 [2024-11-13 16:07:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:07:35,701 INFO L471 AbstractCegarLoop]: Abstraction has 897 states and 1059 transitions. [2024-11-13 16:07:35,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 31 states have internal predecessors, (76), 19 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (42), 16 states have call predecessors, (42), 17 states have call successors, (42) [2024-11-13 16:07:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1059 transitions. [2024-11-13 16:07:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-13 16:07:35,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:07:35,704 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:07:35,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 16:07:35,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 16:07:35,909 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:07:35,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:07:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1710846669, now seen corresponding path program 3 times [2024-11-13 16:07:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:07:35,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902493172] [2024-11-13 16:07:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:07:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:07:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-13 16:07:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,549 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:07:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 16:07:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:07:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 16:07:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,561 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:07:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 16:07:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-13 16:07:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 16:07:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-13 16:07:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-13 16:07:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-13 16:07:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-11-13 16:07:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-11-13 16:07:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,589 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-11-13 16:07:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-11-13 16:07:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-11-13 16:07:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-11-13 16:07:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-11-13 16:07:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-11-13 16:07:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-11-13 16:07:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-11-13 16:07:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-11-13 16:07:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-11-13 16:07:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-11-13 16:07:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:07:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 69 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-13 16:07:36,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:07:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902493172] [2024-11-13 16:07:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902493172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:07:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664787707] [2024-11-13 16:07:36,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:07:36,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:07:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:07:36,627 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:07:36,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 16:07:37,004 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-13 16:07:37,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:07:37,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:07:37,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:07:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 69 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-13 16:07:37,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:07:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 69 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-11-13 16:07:37,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664787707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:07:37,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:07:37,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-11-13 16:07:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040951607] [2024-11-13 16:07:37,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:07:37,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:07:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:07:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:07:37,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:07:37,490 INFO L87 Difference]: Start difference. First operand 897 states and 1059 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2024-11-13 16:07:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:07:38,213 INFO L93 Difference]: Finished difference Result 1044 states and 1243 transitions. [2024-11-13 16:07:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:07:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 170 [2024-11-13 16:07:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:07:38,217 INFO L225 Difference]: With dead ends: 1044 [2024-11-13 16:07:38,217 INFO L226 Difference]: Without dead ends: 844 [2024-11-13 16:07:38,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:07:38,218 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 4 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:07:38,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 485 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:07:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2024-11-13 16:07:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2024-11-13 16:07:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 579 states have (on average 1.1243523316062176) internal successors, (651), 605 states have internal predecessors, (651), 174 states have call successors, (174), 90 states have call predecessors, (174), 90 states have return successors, (173), 148 states have call predecessors, (173), 173 states have call successors, (173) [2024-11-13 16:07:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 998 transitions. [2024-11-13 16:07:38,814 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 998 transitions. Word has length 170 [2024-11-13 16:07:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:07:38,814 INFO L471 AbstractCegarLoop]: Abstraction has 844 states and 998 transitions. [2024-11-13 16:07:38,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2024-11-13 16:07:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 998 transitions. [2024-11-13 16:07:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-13 16:07:38,816 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:07:38,816 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:07:38,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 16:07:39,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 16:07:39,016 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:07:39,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:07:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1032605065, now seen corresponding path program 4 times [2024-11-13 16:07:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:07:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023499601] [2024-11-13 16:07:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:07:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:07:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:07:39,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056952193] [2024-11-13 16:07:39,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:07:39,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:07:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:07:39,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:07:39,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8736d2e-411a-4743-8e2b-89d87d623aa0/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 16:07:39,268 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:07:39,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:07:39,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-13 16:07:39,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:07:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 81 proven. 184 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-11-13 16:07:41,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:08:47,716 WARN L286 SmtUtils]: Spent 11.60s on a formula simplification that was a NOOP. DAG size: 376 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)