./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.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_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:43:58,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:43:58,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:43:58,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:43:58,648 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:43:58,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:43:58,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:43:58,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:43:58,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:43:58,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:43:58,697 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:43:58,698 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:43:58,698 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:43:58,699 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:43:58,701 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:43:58,701 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:43:58,701 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:43:58,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:43:58,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:43:58,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:43:58,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:43:58,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:43:58,702 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:43:58,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:43:58,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:43:58,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:43:58,704 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:43:58,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:43:58,706 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E 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 -> Taipan 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 -> 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe [2024-11-13 23:43:59,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:43:59,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:43:59,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:43:59,125 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:43:59,125 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:43:59,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c Unable to find full path for "g++" [2024-11-13 23:44:01,217 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:44:01,595 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:44:01,598 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2024-11-13 23:44:01,611 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/data/9a6563df7/180b6674ba764861bd007113a10f1506/FLAG658b8db1d [2024-11-13 23:44:01,644 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/data/9a6563df7/180b6674ba764861bd007113a10f1506 [2024-11-13 23:44:01,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:44:01,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:44:01,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:44:01,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:44:01,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:44:01,662 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:44:01" (1/1) ... [2024-11-13 23:44:01,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264a7bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:01, skipping insertion in model container [2024-11-13 23:44:01,666 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:44:01" (1/1) ... [2024-11-13 23:44:01,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:44:01,896 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_e130c016-4117-4606-8c01-5aceb40c5055/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2024-11-13 23:44:01,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:44:01,955 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:44:01,969 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_e130c016-4117-4606-8c01-5aceb40c5055/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c[538,551] [2024-11-13 23:44:01,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:44:02,008 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:44:02,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02 WrapperNode [2024-11-13 23:44:02,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:44:02,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:44:02,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:44:02,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:44:02,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,056 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-13 23:44:02,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:44:02,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:44:02,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:44:02,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:44:02,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:44:02,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:44:02,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:44:02,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:44:02,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (1/1) ... [2024-11-13 23:44:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:44:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:02,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:44:02,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:44:02,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:44:02,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:44:02,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:44:02,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:44:02,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 23:44:02,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 23:44:02,261 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:44:02,265 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:44:02,567 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-13 23:44:02,568 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:44:02,671 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:44:02,671 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 23:44:02,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:44:02 BoogieIcfgContainer [2024-11-13 23:44:02,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:44:02,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:44:02,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:44:02,683 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:44:02,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:44:01" (1/3) ... [2024-11-13 23:44:02,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1312df27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:44:02, skipping insertion in model container [2024-11-13 23:44:02,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:44:02" (2/3) ... [2024-11-13 23:44:02,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1312df27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:44:02, skipping insertion in model container [2024-11-13 23:44:02,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:44:02" (3/3) ... [2024-11-13 23:44:02,689 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2024-11-13 23:44:02,710 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:44:02,713 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_unwindbound5.c that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 23:44:02,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:44:02,807 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=FINITE_AUTOMATA, 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;@2bf747c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:44:02,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:44:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 23:44:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:44:02,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:02,824 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:02,825 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:02,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:02,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1654084864, now seen corresponding path program 1 times [2024-11-13 23:44:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102783683] [2024-11-13 23:44:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:03,006 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 23:44:03,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:03,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102783683] [2024-11-13 23:44:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102783683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:03,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:03,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:44:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064130105] [2024-11-13 23:44:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:03,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 23:44:03,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 23:44:03,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 23:44:03,041 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 23:44:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:03,075 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2024-11-13 23:44:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 23:44:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2024-11-13 23:44:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:03,086 INFO L225 Difference]: With dead ends: 43 [2024-11-13 23:44:03,086 INFO L226 Difference]: Without dead ends: 20 [2024-11-13 23:44:03,091 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 23:44:03,094 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:03,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:44:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-13 23:44:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-13 23:44:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 23:44:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2024-11-13 23:44:03,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2024-11-13 23:44:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:03,151 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2024-11-13 23:44:03,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 23:44:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2024-11-13 23:44:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:44:03,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:03,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:03,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:44:03,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:03,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2115219753, now seen corresponding path program 1 times [2024-11-13 23:44:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:03,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608101288] [2024-11-13 23:44:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:03,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:03,386 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 23:44:03,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:03,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608101288] [2024-11-13 23:44:03,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608101288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:03,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:03,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:44:03,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152965318] [2024-11-13 23:44:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:03,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:44:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:44:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:44:03,390 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 23:44:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:03,506 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2024-11-13 23:44:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:44:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-13 23:44:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:03,512 INFO L225 Difference]: With dead ends: 33 [2024-11-13 23:44:03,513 INFO L226 Difference]: Without dead ends: 31 [2024-11-13 23:44:03,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 23:44:03,515 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:03,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-13 23:44:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-11-13 23:44:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 23:44:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-13 23:44:03,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2024-11-13 23:44:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:03,533 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-13 23:44:03,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 23:44:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-13 23:44:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 23:44:03,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:03,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:03,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:44:03,535 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:03,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 174216846, now seen corresponding path program 1 times [2024-11-13 23:44:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87486736] [2024-11-13 23:44:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:03,680 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 23:44:03,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87486736] [2024-11-13 23:44:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87486736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:03,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:03,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:44:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065567123] [2024-11-13 23:44:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:03,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:44:03,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:44:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:44:03,684 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:44:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:03,724 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-11-13 23:44:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:44:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2024-11-13 23:44:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:03,726 INFO L225 Difference]: With dead ends: 39 [2024-11-13 23:44:03,727 INFO L226 Difference]: Without dead ends: 26 [2024-11-13 23:44:03,727 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 23:44:03,728 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:03,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:44:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-13 23:44:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-13 23:44:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 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 23:44:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-13 23:44:03,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2024-11-13 23:44:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:03,747 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-13 23:44:03,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:44:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-13 23:44:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 23:44:03,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:03,748 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:03,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:44:03,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:03,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1872131942, now seen corresponding path program 1 times [2024-11-13 23:44:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:03,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330788049] [2024-11-13 23:44:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:03,995 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 23:44:03,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:03,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330788049] [2024-11-13 23:44:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330788049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:03,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:03,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:44:03,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855613539] [2024-11-13 23:44:03,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:03,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:44:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:03,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:44:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:44:03,999 INFO L87 Difference]: Start difference. First operand 26 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, (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 23:44:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:04,117 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-13 23:44:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:44:04,121 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, (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 12 [2024-11-13 23:44:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:04,122 INFO L225 Difference]: With dead ends: 39 [2024-11-13 23:44:04,122 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 23:44:04,122 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 23:44:04,123 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:04,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 23:44:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-11-13 23:44:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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 23:44:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-13 23:44:04,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2024-11-13 23:44:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:04,145 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-13 23:44:04,145 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, (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 23:44:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-13 23:44:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 23:44:04,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:04,146 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:04,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:44:04,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:04,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1306040329, now seen corresponding path program 1 times [2024-11-13 23:44:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:04,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140577125] [2024-11-13 23:44:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:04,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111726945] [2024-11-13 23:44:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:04,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:04,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:44:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:04,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 23:44:04,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:04,459 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 23:44:04,459 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:44:04,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140577125] [2024-11-13 23:44:04,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:04,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111726945] [2024-11-13 23:44:04,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111726945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:04,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:04,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:44:04,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128011521] [2024-11-13 23:44:04,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:04,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:44:04,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:44:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:44:04,465 INFO L87 Difference]: Start difference. First operand 30 states and 37 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, (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 23:44:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:04,619 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-11-13 23:44:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:44:04,620 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, (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 17 [2024-11-13 23:44:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:04,621 INFO L225 Difference]: With dead ends: 58 [2024-11-13 23:44:04,621 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 23:44:04,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 23:44:04,622 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:04,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 23:44:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-13 23:44:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 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 23:44:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2024-11-13 23:44:04,646 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 17 [2024-11-13 23:44:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:04,646 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2024-11-13 23:44:04,646 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, (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 23:44:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2024-11-13 23:44:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 23:44:04,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:04,649 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:04,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 23:44:04,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:04,849 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:04,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash -507918445, now seen corresponding path program 1 times [2024-11-13 23:44:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:04,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711187669] [2024-11-13 23:44:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:05,001 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 23:44:05,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711187669] [2024-11-13 23:44:05,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711187669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:05,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:05,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 23:44:05,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739543312] [2024-11-13 23:44:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:05,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 23:44:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 23:44:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:44:05,003 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:44:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:05,106 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-13 23:44:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:44:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-13 23:44:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:05,110 INFO L225 Difference]: With dead ends: 63 [2024-11-13 23:44:05,110 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 23:44:05,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:44:05,113 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 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 23:44:05,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 23:44:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-13 23:44:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 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 23:44:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-13 23:44:05,142 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2024-11-13 23:44:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:05,144 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-13 23:44:05,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 23:44:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-13 23:44:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 23:44:05,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:05,145 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:05,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 23:44:05,146 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:05,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:05,146 INFO L85 PathProgramCache]: Analyzing trace with hash -506190567, now seen corresponding path program 1 times [2024-11-13 23:44:05,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:05,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762754767] [2024-11-13 23:44:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:05,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927952757] [2024-11-13 23:44:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:05,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:05,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:44:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:05,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:44:05,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:44:05,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:44:05,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:05,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762754767] [2024-11-13 23:44:05,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:05,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927952757] [2024-11-13 23:44:05,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927952757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706950861] [2024-11-13 23:44:05,879 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-13 23:44:05,879 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:05,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:05,890 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:05,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:06,596 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2024-11-13 23:44:06,607 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [706950861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:07,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:44:07,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 18 [2024-11-13 23:44:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532919520] [2024-11-13 23:44:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:07,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:44:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:44:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:44:07,479 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 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 23:44:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:07,787 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2024-11-13 23:44:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:44:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 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 25 [2024-11-13 23:44:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:07,789 INFO L225 Difference]: With dead ends: 61 [2024-11-13 23:44:07,789 INFO L226 Difference]: Without dead ends: 59 [2024-11-13 23:44:07,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:44:07,791 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:07,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:44:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-13 23:44:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-13 23:44:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 23:44:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-11-13 23:44:07,819 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 25 [2024-11-13 23:44:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:07,820 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-11-13 23:44:07,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 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 23:44:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-11-13 23:44:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 23:44:07,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:07,823 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:07,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:44:08,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:08,028 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:08,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1960004552, now seen corresponding path program 1 times [2024-11-13 23:44:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686057148] [2024-11-13 23:44:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 23:44:08,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:08,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686057148] [2024-11-13 23:44:08,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686057148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:44:08,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239746068] [2024-11-13 23:44:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:08,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:08,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:08,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:44:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:08,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:44:08,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 23:44:08,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 23:44:08,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239746068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:08,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573886483] [2024-11-13 23:44:08,459 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-13 23:44:08,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:08,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:08,460 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:08,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:10,672 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:44:10,680 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:15,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1352#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:44:15,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:44:15,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:44:15,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-13 23:44:15,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641095913] [2024-11-13 23:44:15,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:44:15,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:44:15,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:44:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:44:15,632 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-13 23:44:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:15,882 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2024-11-13 23:44:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:44:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 27 [2024-11-13 23:44:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:15,885 INFO L225 Difference]: With dead ends: 124 [2024-11-13 23:44:15,885 INFO L226 Difference]: Without dead ends: 111 [2024-11-13 23:44:15,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:44:15,887 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:15,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:44:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-13 23:44:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-11-13 23:44:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 70 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 23:44:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2024-11-13 23:44:15,909 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 27 [2024-11-13 23:44:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:15,909 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2024-11-13 23:44:15,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-13 23:44:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2024-11-13 23:44:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 23:44:15,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:15,911 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-13 23:44:15,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 23:44:16,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:16,112 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:16,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 448166817, now seen corresponding path program 1 times [2024-11-13 23:44:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:16,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342324115] [2024-11-13 23:44:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972063966] [2024-11-13 23:44:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:16,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:16,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:16,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:16,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:44:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:16,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 23:44:16,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:44:16,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 23:44:16,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342324115] [2024-11-13 23:44:16,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972063966] [2024-11-13 23:44:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972063966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734497935] [2024-11-13 23:44:16,590 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-13 23:44:16,590 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:16,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:16,595 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:16,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:18,163 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:44:18,173 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:21,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1943#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:44:21,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:44:21,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:44:21,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2024-11-13 23:44:21,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110565644] [2024-11-13 23:44:21,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:44:21,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 23:44:21,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 23:44:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-13 23:44:21,189 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 23:44:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:21,463 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2024-11-13 23:44:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:44:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2024-11-13 23:44:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:21,467 INFO L225 Difference]: With dead ends: 150 [2024-11-13 23:44:21,467 INFO L226 Difference]: Without dead ends: 130 [2024-11-13 23:44:21,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-13 23:44:21,469 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:21,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 138 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:44:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-13 23:44:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2024-11-13 23:44:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 86 states have internal predecessors, (94), 29 states have call successors, (29), 17 states have call predecessors, (29), 17 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-13 23:44:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2024-11-13 23:44:21,493 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 35 [2024-11-13 23:44:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:21,494 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2024-11-13 23:44:21,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 23:44:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2024-11-13 23:44:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 23:44:21,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:21,495 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:21,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:44:21,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:21,696 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:21,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -938277045, now seen corresponding path program 1 times [2024-11-13 23:44:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251519307] [2024-11-13 23:44:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:21,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143087121] [2024-11-13 23:44:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:21,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:21,723 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:21,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:44:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:21,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 23:44:21,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:44:21,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 23:44:22,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251519307] [2024-11-13 23:44:22,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143087121] [2024-11-13 23:44:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143087121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119095620] [2024-11-13 23:44:22,126 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-13 23:44:22,126 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:22,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:22,126 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:22,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:22,493 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2024-11-13 23:44:22,532 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1119095620] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:23,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:44:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 7] total 19 [2024-11-13 23:44:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752025995] [2024-11-13 23:44:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:23,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:44:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:44:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:44:23,628 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 23:44:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:23,885 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2024-11-13 23:44:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:44:23,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-13 23:44:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:23,894 INFO L225 Difference]: With dead ends: 130 [2024-11-13 23:44:23,895 INFO L226 Difference]: Without dead ends: 109 [2024-11-13 23:44:23,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-13 23:44:23,896 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:23,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:44:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-13 23:44:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-13 23:44:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 73 states have internal predecessors, (80), 25 states have call successors, (25), 14 states have call predecessors, (25), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-13 23:44:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2024-11-13 23:44:23,916 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 36 [2024-11-13 23:44:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:23,917 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2024-11-13 23:44:23,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 23:44:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2024-11-13 23:44:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 23:44:23,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:23,918 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:23,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 23:44:24,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:44:24,119 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:24,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -721972931, now seen corresponding path program 1 times [2024-11-13 23:44:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:24,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454896231] [2024-11-13 23:44:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:24,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-13 23:44:24,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454896231] [2024-11-13 23:44:24,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454896231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:44:24,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64747309] [2024-11-13 23:44:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:24,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:24,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:24,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:24,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:44:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:24,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 23:44:24,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 23:44:24,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-13 23:44:24,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64747309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862578897] [2024-11-13 23:44:24,506 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-13 23:44:24,506 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:24,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:24,506 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:24,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:25,637 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:44:25,642 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:28,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3256#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:44:28,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:44:28,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:44:28,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2024-11-13 23:44:28,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772891185] [2024-11-13 23:44:28,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:44:28,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:44:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:44:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:44:28,381 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 23:44:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:28,568 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-11-13 23:44:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:44:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 43 [2024-11-13 23:44:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:28,570 INFO L225 Difference]: With dead ends: 157 [2024-11-13 23:44:28,570 INFO L226 Difference]: Without dead ends: 142 [2024-11-13 23:44:28,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-11-13 23:44:28,572 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:28,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-13 23:44:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2024-11-13 23:44:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 92 states have internal predecessors, (101), 29 states have call successors, (29), 18 states have call predecessors, (29), 18 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-13 23:44:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2024-11-13 23:44:28,594 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 43 [2024-11-13 23:44:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:28,595 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2024-11-13 23:44:28,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-13 23:44:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2024-11-13 23:44:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 23:44:28,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:28,596 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:28,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:44:28,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:28,800 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:28,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -720245053, now seen corresponding path program 1 times [2024-11-13 23:44:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16678421] [2024-11-13 23:44:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732888970] [2024-11-13 23:44:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:28,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:28,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:28,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:28,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:44:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:28,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 23:44:28,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-13 23:44:29,016 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:44:29,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:29,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16678421] [2024-11-13 23:44:29,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:29,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732888970] [2024-11-13 23:44:29,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732888970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:44:29,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:44:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 23:44:29,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584935298] [2024-11-13 23:44:29,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:44:29,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:44:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:44:29,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:44:29,019 INFO L87 Difference]: Start difference. First operand 137 states and 157 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 23:44:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:29,096 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2024-11-13 23:44:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:44:29,097 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 43 [2024-11-13 23:44:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:29,099 INFO L225 Difference]: With dead ends: 152 [2024-11-13 23:44:29,099 INFO L226 Difference]: Without dead ends: 150 [2024-11-13 23:44:29,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 23:44:29,100 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:29,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:44:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-13 23:44:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2024-11-13 23:44:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 96 states have (on average 1.125) internal successors, (108), 100 states have internal predecessors, (108), 31 states have call successors, (31), 20 states have call predecessors, (31), 20 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-13 23:44:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 168 transitions. [2024-11-13 23:44:29,130 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 168 transitions. Word has length 43 [2024-11-13 23:44:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:29,130 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 168 transitions. [2024-11-13 23:44:29,130 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 23:44:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 168 transitions. [2024-11-13 23:44:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 23:44:29,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:29,132 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] [2024-11-13 23:44:29,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:44:29,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:29,337 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:29,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1991197863, now seen corresponding path program 1 times [2024-11-13 23:44:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639112524] [2024-11-13 23:44:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:29,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289314972] [2024-11-13 23:44:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:29,400 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:29,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:44:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:29,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 23:44:29,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:44:30,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:44:33,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639112524] [2024-11-13 23:44:33,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289314972] [2024-11-13 23:44:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289314972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709920364] [2024-11-13 23:44:33,885 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:44:33,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:33,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:33,886 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:33,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:35,801 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:44:35,805 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:44:48,746 WARN L286 SmtUtils]: Spent 11.35s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:44:49,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4676#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:44:49,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:44:49,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:44:49,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-13 23:44:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883017296] [2024-11-13 23:44:49,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:44:49,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:44:49,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:44:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:44:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:44:49,260 INFO L87 Difference]: Start difference. First operand 148 states and 168 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-13 23:44:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:50,987 INFO L93 Difference]: Finished difference Result 181 states and 203 transitions. [2024-11-13 23:44:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 23:44:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2024-11-13 23:44:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:50,990 INFO L225 Difference]: With dead ends: 181 [2024-11-13 23:44:50,991 INFO L226 Difference]: Without dead ends: 179 [2024-11-13 23:44:50,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-13 23:44:50,992 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:50,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 201 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 23:44:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-13 23:44:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2024-11-13 23:44:51,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 118 states have internal predecessors, (126), 32 states have call successors, (32), 25 states have call predecessors, (32), 25 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-13 23:44:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2024-11-13 23:44:51,047 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 56 [2024-11-13 23:44:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:51,047 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2024-11-13 23:44:51,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-13 23:44:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2024-11-13 23:44:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 23:44:51,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:51,052 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] [2024-11-13 23:44:51,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 23:44:51,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:51,256 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:51,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash -563738357, now seen corresponding path program 1 times [2024-11-13 23:44:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:51,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846926990] [2024-11-13 23:44:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:44:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121076203] [2024-11-13 23:44:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:51,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:51,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:51,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:44:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:51,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 23:44:51,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-13 23:44:51,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:44:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-13 23:44:52,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846926990] [2024-11-13 23:44:52,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:44:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121076203] [2024-11-13 23:44:52,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121076203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:44:52,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955521609] [2024-11-13 23:44:52,853 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-13 23:44:52,854 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:44:52,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:44:52,855 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:44:52,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:44:54,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:44:54,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:16,495 WARN L286 SmtUtils]: Spent 19.27s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:45:17,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5658#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:45:17,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:17,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:45:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-13 23:45:17,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869336855] [2024-11-13 23:45:17,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:17,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 23:45:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 23:45:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-11-13 23:45:17,511 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-13 23:45:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:17,983 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2024-11-13 23:45:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 23:45:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 67 [2024-11-13 23:45:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:17,985 INFO L225 Difference]: With dead ends: 190 [2024-11-13 23:45:17,985 INFO L226 Difference]: Without dead ends: 186 [2024-11-13 23:45:17,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-11-13 23:45:17,987 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:17,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 238 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:45:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-13 23:45:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 170. [2024-11-13 23:45:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 115 states have internal predecessors, (126), 32 states have call successors, (32), 25 states have call predecessors, (32), 24 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-13 23:45:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 188 transitions. [2024-11-13 23:45:18,041 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 188 transitions. Word has length 67 [2024-11-13 23:45:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:18,041 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 188 transitions. [2024-11-13 23:45:18,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-13 23:45:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 188 transitions. [2024-11-13 23:45:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 23:45:18,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:18,043 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] [2024-11-13 23:45:18,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:45:18,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:18,244 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:18,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:18,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1251052430, now seen corresponding path program 1 times [2024-11-13 23:45:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41389009] [2024-11-13 23:45:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:18,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:18,828 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 23:45:18,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41389009] [2024-11-13 23:45:18,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41389009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277480683] [2024-11-13 23:45:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:18,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:18,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:45:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:18,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:45:18,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-13 23:45:19,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-13 23:45:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277480683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071561159] [2024-11-13 23:45:19,754 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:45:19,755 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:19,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:19,756 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:19,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:21,393 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:45:21,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:28,366 WARN L286 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:45:30,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6677#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:45:30,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:30,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:30,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2024-11-13 23:45:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50491830] [2024-11-13 23:45:30,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:30,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 23:45:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:30,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 23:45:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=576, Unknown=1, NotChecked=0, Total=650 [2024-11-13 23:45:30,955 INFO L87 Difference]: Start difference. First operand 170 states and 188 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-13 23:45:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:31,183 INFO L93 Difference]: Finished difference Result 176 states and 194 transitions. [2024-11-13 23:45:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 23:45:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 6 states have call successors, (23) Word has length 72 [2024-11-13 23:45:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:31,186 INFO L225 Difference]: With dead ends: 176 [2024-11-13 23:45:31,186 INFO L226 Difference]: Without dead ends: 148 [2024-11-13 23:45:31,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 191 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=81, Invalid=620, Unknown=1, NotChecked=0, Total=702 [2024-11-13 23:45:31,187 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:31,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 176 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:45:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-13 23:45:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-11-13 23:45:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 100 states have internal predecessors, (110), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-13 23:45:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 164 transitions. [2024-11-13 23:45:31,229 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 164 transitions. Word has length 72 [2024-11-13 23:45:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:31,230 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 164 transitions. [2024-11-13 23:45:31,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 6 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 4 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-13 23:45:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 164 transitions. [2024-11-13 23:45:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 23:45:31,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:31,232 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] [2024-11-13 23:45:31,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:45:31,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:31,432 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:31,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -80055546, now seen corresponding path program 1 times [2024-11-13 23:45:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953336221] [2024-11-13 23:45:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:31,564 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 23:45:31,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953336221] [2024-11-13 23:45:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953336221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:31,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945250367] [2024-11-13 23:45:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:31,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:31,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:45:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:31,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:45:31,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:31,704 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 23:45:31,704 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:45:31,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945250367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:45:31,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:45:31,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-13 23:45:31,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471713694] [2024-11-13 23:45:31,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:45:31,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:45:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:45:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 23:45:31,709 INFO L87 Difference]: Start difference. First operand 148 states and 164 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:45:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:31,820 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2024-11-13 23:45:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:45:31,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 77 [2024-11-13 23:45:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:31,822 INFO L225 Difference]: With dead ends: 165 [2024-11-13 23:45:31,822 INFO L226 Difference]: Without dead ends: 145 [2024-11-13 23:45:31,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 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 23:45:31,824 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:31,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:45:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-13 23:45:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2024-11-13 23:45:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 93 states have (on average 1.096774193548387) internal successors, (102), 95 states have internal predecessors, (102), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-13 23:45:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2024-11-13 23:45:31,868 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 77 [2024-11-13 23:45:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:31,869 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2024-11-13 23:45:31,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23:45:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2024-11-13 23:45:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 23:45:31,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:31,870 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:31,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 23:45:32,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:32,075 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:32,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 998412302, now seen corresponding path program 2 times [2024-11-13 23:45:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:32,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104951204] [2024-11-13 23:45:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:32,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:45:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112250392] [2024-11-13 23:45:32,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:45:32,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:32,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:32,110 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:32,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:45:32,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:45:32,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:45:32,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 23:45:32,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-13 23:45:32,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2024-11-13 23:45:34,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104951204] [2024-11-13 23:45:34,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:45:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112250392] [2024-11-13 23:45:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112250392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999804235] [2024-11-13 23:45:34,284 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:45:34,284 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:34,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:34,284 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:34,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:35,710 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:45:35,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:50,503 WARN L286 SmtUtils]: Spent 13.16s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:45:50,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8388#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:45:50,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:50,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:45:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2024-11-13 23:45:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728101632] [2024-11-13 23:45:50,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:50,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 23:45:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 23:45:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:45:50,909 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-13 23:45:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:51,737 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2024-11-13 23:45:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 23:45:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 79 [2024-11-13 23:45:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:51,739 INFO L225 Difference]: With dead ends: 156 [2024-11-13 23:45:51,739 INFO L226 Difference]: Without dead ends: 154 [2024-11-13 23:45:51,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-13 23:45:51,740 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:51,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 223 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:45:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-13 23:45:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2024-11-13 23:45:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 99 states have (on average 1.101010101010101) internal successors, (109), 102 states have internal predecessors, (109), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-13 23:45:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2024-11-13 23:45:51,789 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 79 [2024-11-13 23:45:51,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:51,790 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2024-11-13 23:45:51,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-13 23:45:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2024-11-13 23:45:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 23:45:51,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:51,791 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:51,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 23:45:51,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:45:51,992 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:51,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1004619225, now seen corresponding path program 1 times [2024-11-13 23:45:51,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:51,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415124129] [2024-11-13 23:45:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-13 23:45:52,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415124129] [2024-11-13 23:45:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415124129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986712321] [2024-11-13 23:45:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:52,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:52,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:45:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:52,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 23:45:52,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 23:45:52,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-13 23:45:52,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986712321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:52,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172696222] [2024-11-13 23:45:52,689 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-13 23:45:52,690 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:52,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:52,691 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:52,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:53,491 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:45:53,495 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:54,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9401#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:45:54,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:54,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:54,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 10 [2024-11-13 23:45:54,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943248121] [2024-11-13 23:45:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:54,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:45:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:45:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:45:54,593 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-13 23:45:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:54,799 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2024-11-13 23:45:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 23:45:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 86 [2024-11-13 23:45:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:54,803 INFO L225 Difference]: With dead ends: 197 [2024-11-13 23:45:54,804 INFO L226 Difference]: Without dead ends: 153 [2024-11-13 23:45:54,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:45:54,805 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:54,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:45:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-13 23:45:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-13 23:45:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 101 states have (on average 1.099009900990099) internal successors, (111), 104 states have internal predecessors, (111), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-13 23:45:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2024-11-13 23:45:54,859 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 86 [2024-11-13 23:45:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:54,859 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2024-11-13 23:45:54,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-13 23:45:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2024-11-13 23:45:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 23:45:54,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:54,864 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 23:45:54,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:45:55,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:45:55,068 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:55,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash -242440281, now seen corresponding path program 1 times [2024-11-13 23:45:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821137720] [2024-11-13 23:45:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:45:55,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833537825] [2024-11-13 23:45:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:55,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:55,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:55,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:55,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:45:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:55,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 23:45:55,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-13 23:45:56,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:46:17,077 WARN L286 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:47:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-13 23:47:49,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821137720] [2024-11-13 23:47:49,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 23:47:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833537825] [2024-11-13 23:47:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833537825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:47:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933616695] [2024-11-13 23:47:49,633 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-13 23:47:49,633 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:47:49,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:47:49,634 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:47:49,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:47:51,139 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:47:51,142 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:48:05,149 WARN L286 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:48:07,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10499#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:48:07,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:48:07,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:48:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-13 23:48:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532611698] [2024-11-13 23:48:07,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 23:48:07,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 23:48:07,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:48:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 23:48:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=837, Unknown=1, NotChecked=0, Total=930 [2024-11-13 23:48:07,935 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-13 23:48:17,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-13 23:48:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:48:19,647 INFO L93 Difference]: Finished difference Result 174 states and 199 transitions. [2024-11-13 23:48:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:48:19,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 87 [2024-11-13 23:48:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:48:19,652 INFO L225 Difference]: With dead ends: 174 [2024-11-13 23:48:19,653 INFO L226 Difference]: Without dead ends: 172 [2024-11-13 23:48:19,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 227 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=134, Invalid=1196, Unknown=2, NotChecked=0, Total=1332 [2024-11-13 23:48:19,655 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:48:19,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 307 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 346 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 23:48:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-13 23:48:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 154. [2024-11-13 23:48:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 102 states have (on average 1.107843137254902) internal successors, (113), 104 states have internal predecessors, (113), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-13 23:48:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2024-11-13 23:48:19,724 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 87 [2024-11-13 23:48:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:48:19,724 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2024-11-13 23:48:19,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-13 23:48:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2024-11-13 23:48:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 23:48:19,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:48:19,727 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 23:48:19,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:48:19,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:19,931 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:48:19,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:48:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -240712403, now seen corresponding path program 3 times [2024-11-13 23:48:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:48:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556181090] [2024-11-13 23:48:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:48:19,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:48:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-13 23:48:20,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:48:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556181090] [2024-11-13 23:48:20,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556181090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:48:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827560167] [2024-11-13 23:48:20,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:48:20,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:48:20,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:48:20,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:48:20,410 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:48:20,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:48:20,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 23:48:20,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:48:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-13 23:48:20,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:48:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-13 23:48:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827560167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:48:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732753474] [2024-11-13 23:48:20,823 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-13 23:48:20,823 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:48:20,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:48:20,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:48:20,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:48:22,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:48:22,270 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:48:42,381 WARN L286 SmtUtils]: Spent 18.82s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:48:44,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11561#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:48:44,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:48:44,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:48:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 11 [2024-11-13 23:48:44,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341009853] [2024-11-13 23:48:44,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:48:44,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 23:48:44,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:48:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 23:48:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=457, Unknown=1, NotChecked=0, Total=552 [2024-11-13 23:48:44,771 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-13 23:48:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:48:45,093 INFO L93 Difference]: Finished difference Result 188 states and 205 transitions. [2024-11-13 23:48:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:48:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 87 [2024-11-13 23:48:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:48:45,095 INFO L225 Difference]: With dead ends: 188 [2024-11-13 23:48:45,095 INFO L226 Difference]: Without dead ends: 143 [2024-11-13 23:48:45,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 238 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-11-13 23:48:45,097 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:48:45,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 235 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:48:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-13 23:48:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2024-11-13 23:48:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-13 23:48:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2024-11-13 23:48:45,142 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 87 [2024-11-13 23:48:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:48:45,143 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2024-11-13 23:48:45,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-13 23:48:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2024-11-13 23:48:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 23:48:45,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:48:45,145 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:48:45,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 23:48:45,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:45,349 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:48:45,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:48:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1374590806, now seen corresponding path program 1 times [2024-11-13 23:48:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:48:45,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111137421] [2024-11-13 23:48:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:48:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:48:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-11-13 23:48:45,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:48:45,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111137421] [2024-11-13 23:48:45,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111137421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:48:45,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640819555] [2024-11-13 23:48:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:48:45,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:45,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:48:45,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:48:45,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 23:48:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:46,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 23:48:46,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:48:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 27 proven. 67 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-13 23:48:46,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:48:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 27 proven. 67 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-13 23:48:47,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640819555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:48:47,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122346164] [2024-11-13 23:48:47,695 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-13 23:48:47,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:48:47,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:48:47,695 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:48:47,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:48:49,279 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-13 23:48:49,283 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:00,223 WARN L286 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 83 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 23:49:02,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12647#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-13 23:49:02,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:02,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 16 [2024-11-13 23:49:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858261967] [2024-11-13 23:49:02,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:02,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 23:49:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 23:49:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=727, Unknown=2, NotChecked=0, Total=812 [2024-11-13 23:49:02,716 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 6 states have call predecessors, (29), 8 states have call successors, (29) [2024-11-13 23:49:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:03,137 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2024-11-13 23:49:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 23:49:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 6 states have call predecessors, (29), 8 states have call successors, (29) Word has length 92 [2024-11-13 23:49:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:03,140 INFO L225 Difference]: With dead ends: 151 [2024-11-13 23:49:03,140 INFO L226 Difference]: Without dead ends: 119 [2024-11-13 23:49:03,141 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 247 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=91, Invalid=777, Unknown=2, NotChecked=0, Total=870 [2024-11-13 23:49:03,141 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:03,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 306 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:49:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-13 23:49:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-13 23:49:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-13 23:49:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2024-11-13 23:49:03,187 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 92 [2024-11-13 23:49:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:03,188 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2024-11-13 23:49:03,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 6 states have call predecessors, (29), 8 states have call successors, (29) [2024-11-13 23:49:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2024-11-13 23:49:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-13 23:49:03,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:03,190 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:03,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:03,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 23:49:03,394 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:03,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1896056447, now seen corresponding path program 2 times [2024-11-13 23:49:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:03,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650751597] [2024-11-13 23:49:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:03,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 23:49:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348495243] [2024-11-13 23:49:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:49:03,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:03,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:03,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 23:49:03,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-13 23:49:03,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-13 23:49:03,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 23:49:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 23:49:03,612 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-13 23:49:03,613 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 23:49:03,614 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 23:49:03,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 23:49:03,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:03,820 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:03,863 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 23:49:03,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 11:49:03 BoogieIcfgContainer [2024-11-13 23:49:03,867 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 23:49:03,868 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 23:49:03,869 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 23:49:03,869 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 23:49:03,872 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:44:02" (3/4) ... [2024-11-13 23:49:03,873 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-13 23:49:03,977 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-13 23:49:03,977 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 23:49:03,980 INFO L158 Benchmark]: Toolchain (without parser) took 302326.45ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 118.4MB in the beginning and 328.2MB in the end (delta: -209.8MB). Peak memory consumption was 489.7MB. Max. memory is 16.1GB. [2024-11-13 23:49:03,980 INFO L158 Benchmark]: CDTParser took 1.77ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 23:49:03,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 355.90ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 107.1MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 23:49:03,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.10ms. Allocated memory is still 142.6MB. Free memory was 107.1MB in the beginning and 105.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 23:49:03,982 INFO L158 Benchmark]: Boogie Preprocessor took 39.07ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.8MB in the end (delta: 919.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 23:49:03,983 INFO L158 Benchmark]: RCFGBuilder took 572.04ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 90.5MB in the end (delta: 14.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 23:49:03,983 INFO L158 Benchmark]: TraceAbstraction took 301193.16ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 89.9MB in the beginning and 332.4MB in the end (delta: -242.4MB). Peak memory consumption was 472.9MB. Max. memory is 16.1GB. [2024-11-13 23:49:03,983 INFO L158 Benchmark]: Witness Printer took 109.03ms. Allocated memory is still 847.2MB. Free memory was 332.4MB in the beginning and 328.2MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 23:49:03,988 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.77ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 355.90ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 107.1MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.10ms. Allocated memory is still 142.6MB. Free memory was 107.1MB in the beginning and 105.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.07ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 104.8MB in the end (delta: 919.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 572.04ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 90.5MB in the end (delta: 14.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 301193.16ms. Allocated memory was 142.6MB in the beginning and 847.2MB in the end (delta: 704.6MB). Free memory was 89.9MB in the beginning and 332.4MB in the end (delta: -242.4MB). Peak memory consumption was 472.9MB. Max. memory is 16.1GB. * Witness Printer took 109.03ms. Allocated memory is still 847.2MB. Free memory was 332.4MB in the beginning and 328.2MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [A=4, B=1, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=1, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=1, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [A=4, B=1, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L36] RET __VERIFIER_assert(q == 0) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L37] RET __VERIFIER_assert(r == A) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L38] RET __VERIFIER_assert(d == B * p) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [A=4, B=1, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [A=4, B=1, counter=6, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 301.1s, OverallIterations: 22, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 18.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 390 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 319 mSDsluCounter, 2954 SdHoareTripleChecker+Invalid, 7.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2363 mSDsCounter, 224 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2665 IncrementalHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 224 mSolverCounterUnsat, 591 mSDtfsCounter, 2665 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2587 GetRequests, 2190 SyntacticMatches, 53 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 150.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=13, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 21 MinimizatonAttempts, 81 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 130.4s InterpolantComputationTime, 2102 NumberOfCodeBlocks, 2064 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 2224 ConstructedInterpolants, 0 QuantifiedInterpolants, 38215 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2301 ConjunctsInSsa, 281 ConjunctsInUnsatCore, 41 InterpolantComputations, 8 PerfectInterpolantSequences, 6475/7567 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 39, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 27, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 26, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 16, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 69, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 92, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 34, DOMAIN_JOIN_TIME: 0.3s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 39, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 16, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 393, DAG_COMPRESSION_RETAINED_NODES: 100, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-13 23:49:04,211 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-13 23:49:04,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e130c016-4117-4606-8c01-5aceb40c5055/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE