./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/toy.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/toy.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh --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 4a8eabec1830ab654b41f6937ec2f9359cd3dd371ede66eafc352bac48edda3b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:15:14,256 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:15:14,322 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 08:15:14,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:15:14,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:15:14,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:15:14,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:15:14,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:15:14,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:15:14,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:15:14,355 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:15:14,355 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:15:14,356 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:15:14,356 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:15:14,356 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:15:14,357 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:15:14,357 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:15:14,358 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:15:14,358 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:15:14,359 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:15:14,359 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:15:14,360 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:15:14,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:15:14,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:15:14,362 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:15:14,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:15:14,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:15:14,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:15:14,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:15:14,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:15:14,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:15:14,365 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:15:14,365 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:15:14,365 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:15:14,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:15:14,366 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:15:14,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:15:14,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:15:14,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:15:14,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:15:14,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:15:14,367 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:15:14,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:15:14,368 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:15:14,368 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:15:14,368 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:15:14,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:15:14,368 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8eabec1830ab654b41f6937ec2f9359cd3dd371ede66eafc352bac48edda3b [2023-12-02 08:15:14,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:15:14,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:15:14,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:15:14,601 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:15:14,601 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:15:14,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/toy.cil.c [2023-12-02 08:15:17,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:15:17,514 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:15:17,515 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/sv-benchmarks/c/systemc/toy.cil.c [2023-12-02 08:15:17,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/data/f1a3e1e30/e63767a062594158973c2cc830cec87d/FLAG32c4a100f [2023-12-02 08:15:17,542 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/data/f1a3e1e30/e63767a062594158973c2cc830cec87d [2023-12-02 08:15:17,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:15:17,546 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:15:17,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:15:17,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:15:17,553 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:15:17,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,555 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e3818e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17, skipping insertion in model container [2023-12-02 08:15:17,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,598 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:15:17,741 WARN L240 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_b3927886-d017-4540-9077-5d58829c11ca/sv-benchmarks/c/systemc/toy.cil.c[697,710] [2023-12-02 08:15:17,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:15:17,814 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:15:17,823 WARN L240 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_b3927886-d017-4540-9077-5d58829c11ca/sv-benchmarks/c/systemc/toy.cil.c[697,710] [2023-12-02 08:15:17,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:15:17,878 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:15:17,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17 WrapperNode [2023-12-02 08:15:17,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:15:17,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:15:17,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:15:17,880 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:15:17,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,921 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 366 [2023-12-02 08:15:17,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:15:17,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:15:17,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:15:17,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:15:17,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:15:17,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:15:17,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:15:17,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:15:17,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (1/1) ... [2023-12-02 08:15:17,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:15:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:17,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:15:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:15:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:15:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:15:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:15:18,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:15:18,106 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:15:18,120 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:15:18,516 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:15:18,777 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:15:18,778 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 08:15:18,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:15:18 BoogieIcfgContainer [2023-12-02 08:15:18,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:15:18,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:15:18,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:15:18,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:15:18,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:15:17" (1/3) ... [2023-12-02 08:15:18,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bab15cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:15:18, skipping insertion in model container [2023-12-02 08:15:18,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:15:17" (2/3) ... [2023-12-02 08:15:18,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bab15cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:15:18, skipping insertion in model container [2023-12-02 08:15:18,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:15:18" (3/3) ... [2023-12-02 08:15:18,787 INFO L112 eAbstractionObserver]: Analyzing ICFG toy.cil.c [2023-12-02 08:15:18,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:15:18,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:15:18,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:15:18,846 INFO L357 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, mHoare=true, 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;@4ca7b7bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:15:18,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:15:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 08:15:18,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:18,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:18,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:18,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash 834798043, now seen corresponding path program 1 times [2023-12-02 08:15:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:18,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777279552] [2023-12-02 08:15:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:19,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777279552] [2023-12-02 08:15:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777279552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:19,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:19,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 08:15:19,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387179972] [2023-12-02 08:15:19,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:19,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:19,116 INFO L87 Difference]: Start difference. First operand has 43 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:19,223 INFO L93 Difference]: Finished difference Result 111 states and 179 transitions. [2023-12-02 08:15:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 08:15:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:19,234 INFO L225 Difference]: With dead ends: 111 [2023-12-02 08:15:19,235 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 08:15:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:19,241 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 35 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:19,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:15:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 08:15:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-12-02 08:15:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.546875) internal successors, (99), 64 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 99 transitions. [2023-12-02 08:15:19,279 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 99 transitions. Word has length 14 [2023-12-02 08:15:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:19,279 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 99 transitions. [2023-12-02 08:15:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 99 transitions. [2023-12-02 08:15:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 08:15:19,281 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:19,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:19,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:15:19,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:19,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:19,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1145190200, now seen corresponding path program 1 times [2023-12-02 08:15:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:19,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991619368] [2023-12-02 08:15:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:19,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991619368] [2023-12-02 08:15:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991619368] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:15:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015604688] [2023-12-02 08:15:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:19,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:15:19,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:15:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:19,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:15:19,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:15:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:19,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:15:19,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015604688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:19,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:15:19,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-12-02 08:15:19,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234792288] [2023-12-02 08:15:19,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:19,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:15:19,700 INFO L87 Difference]: Start difference. First operand 65 states and 99 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:19,768 INFO L93 Difference]: Finished difference Result 131 states and 204 transitions. [2023-12-02 08:15:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 08:15:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:19,770 INFO L225 Difference]: With dead ends: 131 [2023-12-02 08:15:19,770 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 08:15:19,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:15:19,772 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:19,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 73 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:15:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 08:15:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2023-12-02 08:15:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.5604395604395604) internal successors, (142), 91 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 142 transitions. [2023-12-02 08:15:19,785 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 142 transitions. Word has length 23 [2023-12-02 08:15:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:19,785 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 142 transitions. [2023-12-02 08:15:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 142 transitions. [2023-12-02 08:15:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 08:15:19,787 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:19,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:19,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 08:15:19,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:19,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:19,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2128830857, now seen corresponding path program 1 times [2023-12-02 08:15:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:19,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157039424] [2023-12-02 08:15:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:15:20,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157039424] [2023-12-02 08:15:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157039424] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:15:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471723787] [2023-12-02 08:15:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:20,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:20,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:15:20,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:15:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:20,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:15:20,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:15:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:15:20,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:15:20,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471723787] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:20,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:15:20,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-12-02 08:15:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520393156] [2023-12-02 08:15:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:20,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:20,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:15:20,371 INFO L87 Difference]: Start difference. First operand 92 states and 142 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:20,431 INFO L93 Difference]: Finished difference Result 187 states and 296 transitions. [2023-12-02 08:15:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:20,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 08:15:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:20,433 INFO L225 Difference]: With dead ends: 187 [2023-12-02 08:15:20,434 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 08:15:20,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:15:20,436 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:20,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:15:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 08:15:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2023-12-02 08:15:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.5675675675675675) internal successors, (174), 111 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 174 transitions. [2023-12-02 08:15:20,449 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 174 transitions. Word has length 34 [2023-12-02 08:15:20,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:20,449 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 174 transitions. [2023-12-02 08:15:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 174 transitions. [2023-12-02 08:15:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 08:15:20,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:20,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:20,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:15:20,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:20,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:20,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:20,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1307268619, now seen corresponding path program 1 times [2023-12-02 08:15:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:20,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685561739] [2023-12-02 08:15:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:20,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 08:15:20,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685561739] [2023-12-02 08:15:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685561739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:20,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:15:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177772782] [2023-12-02 08:15:20,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:15:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:15:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:15:20,732 INFO L87 Difference]: Start difference. First operand 112 states and 174 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:20,816 INFO L93 Difference]: Finished difference Result 198 states and 309 transitions. [2023-12-02 08:15:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:15:20,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 08:15:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:20,818 INFO L225 Difference]: With dead ends: 198 [2023-12-02 08:15:20,819 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 08:15:20,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:15:20,821 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:20,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:15:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 08:15:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2023-12-02 08:15:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.5585585585585586) internal successors, (173), 111 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 173 transitions. [2023-12-02 08:15:20,831 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 173 transitions. Word has length 42 [2023-12-02 08:15:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:20,832 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 173 transitions. [2023-12-02 08:15:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 173 transitions. [2023-12-02 08:15:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 08:15:20,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:20,835 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:15:20,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:20,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1069574537, now seen corresponding path program 1 times [2023-12-02 08:15:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:20,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034540203] [2023-12-02 08:15:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:15:20,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:20,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034540203] [2023-12-02 08:15:20,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034540203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:20,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:20,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:15:20,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166903822] [2023-12-02 08:15:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:20,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:20,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:20,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:20,886 INFO L87 Difference]: Start difference. First operand 112 states and 173 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:20,944 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2023-12-02 08:15:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 08:15:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:20,946 INFO L225 Difference]: With dead ends: 197 [2023-12-02 08:15:20,946 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 08:15:20,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:20,948 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:20,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:15:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 08:15:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2023-12-02 08:15:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.5267857142857142) internal successors, (171), 112 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 171 transitions. [2023-12-02 08:15:20,960 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 171 transitions. Word has length 42 [2023-12-02 08:15:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:20,960 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 171 transitions. [2023-12-02 08:15:20,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 171 transitions. [2023-12-02 08:15:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 08:15:20,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:20,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:20,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 08:15:20,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:20,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1618338282, now seen corresponding path program 1 times [2023-12-02 08:15:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:20,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285726598] [2023-12-02 08:15:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:21,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285726598] [2023-12-02 08:15:21,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285726598] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:15:21,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:15:21,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:15:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876742041] [2023-12-02 08:15:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:15:21,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:15:21,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:15:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:21,023 INFO L87 Difference]: Start difference. First operand 113 states and 171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:21,074 INFO L93 Difference]: Finished difference Result 298 states and 454 transitions. [2023-12-02 08:15:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:15:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 08:15:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:21,076 INFO L225 Difference]: With dead ends: 298 [2023-12-02 08:15:21,076 INFO L226 Difference]: Without dead ends: 189 [2023-12-02 08:15:21,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:15:21,078 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:21,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:15:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-02 08:15:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2023-12-02 08:15:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5146198830409356) internal successors, (259), 171 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 259 transitions. [2023-12-02 08:15:21,093 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 259 transitions. Word has length 43 [2023-12-02 08:15:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:21,094 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 259 transitions. [2023-12-02 08:15:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 259 transitions. [2023-12-02 08:15:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 08:15:21,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:21,097 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 08:15:21,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2062915927, now seen corresponding path program 1 times [2023-12-02 08:15:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001581613] [2023-12-02 08:15:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:22,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001581613] [2023-12-02 08:15:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001581613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:15:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434754168] [2023-12-02 08:15:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:22,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:22,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:15:22,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:15:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:22,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 08:15:22,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:15:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:23,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:15:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434754168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:15:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114853890] [2023-12-02 08:15:25,822 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:15:25,822 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:15:25,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:15:25,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:15:25,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:15:31,805 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:15:36,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2496#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:15:36,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:15:36,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:15:36,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 26 [2023-12-02 08:15:36,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37283665] [2023-12-02 08:15:36,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:15:36,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 08:15:36,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 08:15:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2611, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 08:15:36,253 INFO L87 Difference]: Start difference. First operand 172 states and 259 transitions. Second operand has 27 states, 27 states have (on average 4.222222222222222) internal successors, (114), 26 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:41,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:41,006 INFO L93 Difference]: Finished difference Result 1582 states and 2293 transitions. [2023-12-02 08:15:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-02 08:15:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.222222222222222) internal successors, (114), 26 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-02 08:15:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:41,013 INFO L225 Difference]: With dead ends: 1582 [2023-12-02 08:15:41,013 INFO L226 Difference]: Without dead ends: 1406 [2023-12-02 08:15:41,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8989 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3051, Invalid=19001, Unknown=0, NotChecked=0, Total=22052 [2023-12-02 08:15:41,023 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1972 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:41,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1972 Valid, 2414 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 08:15:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2023-12-02 08:15:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 510. [2023-12-02 08:15:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.506876227897839) internal successors, (767), 509 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 767 transitions. [2023-12-02 08:15:41,082 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 767 transitions. Word has length 50 [2023-12-02 08:15:41,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:41,083 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 767 transitions. [2023-12-02 08:15:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.222222222222222) internal successors, (114), 26 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 767 transitions. [2023-12-02 08:15:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 08:15:41,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:41,087 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:41,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:15:41,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 08:15:41,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:41,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1316117895, now seen corresponding path program 1 times [2023-12-02 08:15:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:41,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855572970] [2023-12-02 08:15:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:15:41,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855572970] [2023-12-02 08:15:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855572970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:15:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359501575] [2023-12-02 08:15:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:41,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:15:41,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:15:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:41,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:15:41,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:15:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 08:15:42,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:15:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 08:15:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359501575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:15:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133356218] [2023-12-02 08:15:42,403 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 08:15:42,404 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:15:42,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:15:42,404 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:15:42,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:15:50,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:15:52,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5379#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:15:52,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:15:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:15:52,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 9] total 18 [2023-12-02 08:15:52,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125307648] [2023-12-02 08:15:52,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:15:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 08:15:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:15:52,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 08:15:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 08:15:52,157 INFO L87 Difference]: Start difference. First operand 510 states and 767 transitions. Second operand has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:15:52,712 INFO L93 Difference]: Finished difference Result 1114 states and 1657 transitions. [2023-12-02 08:15:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 08:15:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-02 08:15:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:15:52,715 INFO L225 Difference]: With dead ends: 1114 [2023-12-02 08:15:52,715 INFO L226 Difference]: Without dead ends: 507 [2023-12-02 08:15:52,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=497, Invalid=2809, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 08:15:52,718 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 857 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:15:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 306 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:15:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-12-02 08:15:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 346. [2023-12-02 08:15:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.336231884057971) internal successors, (461), 345 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 461 transitions. [2023-12-02 08:15:52,739 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 461 transitions. Word has length 58 [2023-12-02 08:15:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:15:52,739 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 461 transitions. [2023-12-02 08:15:52,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:15:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 461 transitions. [2023-12-02 08:15:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 08:15:52,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:15:52,741 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:15:52,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 08:15:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:52,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:15:52,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:15:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1178006235, now seen corresponding path program 1 times [2023-12-02 08:15:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:15:52,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378357846] [2023-12-02 08:15:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:15:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:15:55,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:15:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378357846] [2023-12-02 08:15:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378357846] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:15:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899203337] [2023-12-02 08:15:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:15:55,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:15:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:15:55,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:15:55,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:15:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:15:55,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 08:15:55,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:16:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 08:16:01,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:16:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:16:13,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899203337] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:16:13,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448582007] [2023-12-02 08:16:13,286 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 08:16:13,286 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:16:13,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:16:13,286 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:16:13,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:16:15,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:16:19,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7493#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:16:19,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:16:19,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:16:19,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 31 [2023-12-02 08:16:19,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522430389] [2023-12-02 08:16:19,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:16:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 08:16:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 08:16:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 08:16:19,551 INFO L87 Difference]: Start difference. First operand 346 states and 461 transitions. Second operand has 32 states, 32 states have (on average 4.75) internal successors, (152), 31 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:24,131 INFO L93 Difference]: Finished difference Result 1600 states and 2111 transitions. [2023-12-02 08:16:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-12-02 08:16:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 31 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-12-02 08:16:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:24,138 INFO L225 Difference]: With dead ends: 1600 [2023-12-02 08:16:24,139 INFO L226 Difference]: Without dead ends: 1276 [2023-12-02 08:16:24,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5602 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2025, Invalid=12737, Unknown=0, NotChecked=0, Total=14762 [2023-12-02 08:16:24,144 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1297 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:24,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 1028 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 08:16:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2023-12-02 08:16:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 321. [2023-12-02 08:16:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.35625) internal successors, (434), 320 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 434 transitions. [2023-12-02 08:16:24,188 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 434 transitions. Word has length 62 [2023-12-02 08:16:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:24,188 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 434 transitions. [2023-12-02 08:16:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.75) internal successors, (152), 31 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 434 transitions. [2023-12-02 08:16:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 08:16:24,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:24,190 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:24,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:16:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 08:16:24,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:24,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash -806525736, now seen corresponding path program 1 times [2023-12-02 08:16:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:24,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803320035] [2023-12-02 08:16:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:24,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 08:16:24,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:24,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803320035] [2023-12-02 08:16:24,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803320035] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:24,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:24,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:16:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287027445] [2023-12-02 08:16:24,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:16:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:16:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:24,430 INFO L87 Difference]: Start difference. First operand 321 states and 434 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:24,497 INFO L93 Difference]: Finished difference Result 626 states and 848 transitions. [2023-12-02 08:16:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:16:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-12-02 08:16:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:24,500 INFO L225 Difference]: With dead ends: 626 [2023-12-02 08:16:24,500 INFO L226 Difference]: Without dead ends: 319 [2023-12-02 08:16:24,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:16:24,501 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:16:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-12-02 08:16:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 309. [2023-12-02 08:16:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.301948051948052) internal successors, (401), 308 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 401 transitions. [2023-12-02 08:16:24,525 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 401 transitions. Word has length 67 [2023-12-02 08:16:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:24,525 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 401 transitions. [2023-12-02 08:16:24,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 401 transitions. [2023-12-02 08:16:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 08:16:24,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:24,527 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 08:16:24,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1364905234, now seen corresponding path program 1 times [2023-12-02 08:16:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:24,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507308918] [2023-12-02 08:16:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 08:16:24,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:24,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507308918] [2023-12-02 08:16:24,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507308918] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:16:24,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633751391] [2023-12-02 08:16:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:24,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:24,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:16:24,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:16:24,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:16:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:24,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:16:24,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:16:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 08:16:24,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:16:24,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633751391] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:24,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:16:24,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-12-02 08:16:24,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572784874] [2023-12-02 08:16:24,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:24,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:16:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:16:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:16:24,970 INFO L87 Difference]: Start difference. First operand 309 states and 401 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:25,099 INFO L93 Difference]: Finished difference Result 673 states and 875 transitions. [2023-12-02 08:16:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:16:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-02 08:16:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:25,101 INFO L225 Difference]: With dead ends: 673 [2023-12-02 08:16:25,101 INFO L226 Difference]: Without dead ends: 366 [2023-12-02 08:16:25,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:16:25,102 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 113 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:25,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 237 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:16:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-12-02 08:16:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 284. [2023-12-02 08:16:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.226148409893993) internal successors, (347), 283 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2023-12-02 08:16:25,141 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 69 [2023-12-02 08:16:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:25,141 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2023-12-02 08:16:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2023-12-02 08:16:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 08:16:25,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:25,143 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:25,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:16:25,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 08:16:25,344 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:25,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash 573735239, now seen corresponding path program 1 times [2023-12-02 08:16:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928185548] [2023-12-02 08:16:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 08:16:25,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928185548] [2023-12-02 08:16:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928185548] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:25,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:16:25,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:16:25,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304699620] [2023-12-02 08:16:25,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:25,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:16:25,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:25,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:16:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:16:25,418 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:25,472 INFO L93 Difference]: Finished difference Result 400 states and 488 transitions. [2023-12-02 08:16:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:16:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-02 08:16:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:25,473 INFO L225 Difference]: With dead ends: 400 [2023-12-02 08:16:25,473 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 08:16:25,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:16:25,474 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:25,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:16:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 08:16:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-12-02 08:16:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 129 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2023-12-02 08:16:25,494 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 70 [2023-12-02 08:16:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:25,494 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2023-12-02 08:16:25,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2023-12-02 08:16:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 08:16:25,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:25,495 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:25,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 08:16:25,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -628147776, now seen corresponding path program 1 times [2023-12-02 08:16:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303510259] [2023-12-02 08:16:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 08:16:25,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303510259] [2023-12-02 08:16:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303510259] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:16:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268427573] [2023-12-02 08:16:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:25,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:25,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:16:25,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:16:25,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:16:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:25,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 08:16:25,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:16:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 08:16:25,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:16:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268427573] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:16:25,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:16:25,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-12-02 08:16:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052797489] [2023-12-02 08:16:25,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:16:25,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:16:25,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:16:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:16:25,915 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:26,004 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2023-12-02 08:16:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:16:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-12-02 08:16:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:26,005 INFO L225 Difference]: With dead ends: 255 [2023-12-02 08:16:26,005 INFO L226 Difference]: Without dead ends: 145 [2023-12-02 08:16:26,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:16:26,006 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 78 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:26,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 148 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:16:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-02 08:16:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-12-02 08:16:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 143 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2023-12-02 08:16:26,022 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 71 [2023-12-02 08:16:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:26,022 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2023-12-02 08:16:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2023-12-02 08:16:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 08:16:26,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:26,023 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:26,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 08:16:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:26,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:26,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1366147720, now seen corresponding path program 1 times [2023-12-02 08:16:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:26,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106579949] [2023-12-02 08:16:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:16:26,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106579949] [2023-12-02 08:16:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106579949] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:16:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155313064] [2023-12-02 08:16:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:26,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:26,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:16:26,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:16:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:16:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:26,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 08:16:26,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:16:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 08:16:27,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:16:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 08:16:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155313064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:16:27,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834177298] [2023-12-02 08:16:27,621 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-12-02 08:16:27,621 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:16:27,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:16:27,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:16:27,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:16:39,134 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:16:40,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13960#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:16:40,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:16:40,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:16:40,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 28 [2023-12-02 08:16:40,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3901099] [2023-12-02 08:16:40,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:16:40,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 08:16:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 08:16:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3309, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 08:16:40,604 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:16:41,806 INFO L93 Difference]: Finished difference Result 458 states and 519 transitions. [2023-12-02 08:16:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 08:16:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-12-02 08:16:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:16:41,808 INFO L225 Difference]: With dead ends: 458 [2023-12-02 08:16:41,808 INFO L226 Difference]: Without dead ends: 331 [2023-12-02 08:16:41,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1014, Invalid=8106, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 08:16:41,813 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 981 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:16:41,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 565 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 08:16:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-02 08:16:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 117. [2023-12-02 08:16:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 116 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2023-12-02 08:16:41,834 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 73 [2023-12-02 08:16:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:16:41,834 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2023-12-02 08:16:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:16:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2023-12-02 08:16:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 08:16:41,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:16:41,835 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:16:41,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 08:16:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:42,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:16:42,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:16:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash -346148896, now seen corresponding path program 1 times [2023-12-02 08:16:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:16:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642141309] [2023-12-02 08:16:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:16:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:16:44,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:16:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642141309] [2023-12-02 08:16:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642141309] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:16:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029906500] [2023-12-02 08:16:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:16:44,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:16:44,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:16:44,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:16:44,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:16:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:16:44,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 08:16:44,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:16:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:16:45,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:16:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:16:48,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029906500] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:16:48,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225393576] [2023-12-02 08:16:48,671 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:16:48,671 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:16:48,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:16:48,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:16:48,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:16:56,244 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:16:58,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15201#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:16:58,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:16:58,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:16:58,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 45 [2023-12-02 08:16:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919330484] [2023-12-02 08:16:58,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:16:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-02 08:16:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:16:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-02 08:16:58,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=5701, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 08:16:58,230 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 46 states, 46 states have (on average 4.565217391304348) internal successors, (210), 45 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:17:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:17:03,189 INFO L93 Difference]: Finished difference Result 527 states and 590 transitions. [2023-12-02 08:17:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-12-02 08:17:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.565217391304348) internal successors, (210), 45 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-12-02 08:17:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:17:03,191 INFO L225 Difference]: With dead ends: 527 [2023-12-02 08:17:03,191 INFO L226 Difference]: Without dead ends: 461 [2023-12-02 08:17:03,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6923 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1800, Invalid=19370, Unknown=0, NotChecked=0, Total=21170 [2023-12-02 08:17:03,194 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 878 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:17:03,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 1476 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 08:17:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-12-02 08:17:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 165. [2023-12-02 08:17:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1280487804878048) internal successors, (185), 164 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:17:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2023-12-02 08:17:03,213 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 75 [2023-12-02 08:17:03,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:17:03,213 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2023-12-02 08:17:03,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.565217391304348) internal successors, (210), 45 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:17:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2023-12-02 08:17:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 08:17:03,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:17:03,214 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:17:03,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 08:17:03,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:03,415 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:17:03,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:17:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1356536732, now seen corresponding path program 1 times [2023-12-02 08:17:03,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:17:03,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744044998] [2023-12-02 08:17:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:03,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:17:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:17:07,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:17:07,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744044998] [2023-12-02 08:17:07,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744044998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:17:07,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719182943] [2023-12-02 08:17:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:17:07,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:17:07,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:17:07,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:17:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:17:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:17:07,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-02 08:17:07,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:17:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:17:18,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:17:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:17:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719182943] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:17:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397543803] [2023-12-02 08:17:39,755 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:17:39,755 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:17:39,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:17:39,756 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:17:39,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:17:51,829 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:17:57,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16701#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:17:57,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:17:57,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:17:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 69 [2023-12-02 08:17:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569299715] [2023-12-02 08:17:57,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:17:57,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-12-02 08:17:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:17:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-12-02 08:17:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=9311, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 08:17:57,932 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand has 70 states, 70 states have (on average 3.4) internal successors, (238), 69 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:19:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:45,842 INFO L93 Difference]: Finished difference Result 892 states and 1000 transitions. [2023-12-02 08:19:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-12-02 08:19:45,843 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.4) internal successors, (238), 69 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-02 08:19:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:45,846 INFO L225 Difference]: With dead ends: 892 [2023-12-02 08:19:45,846 INFO L226 Difference]: Without dead ends: 778 [2023-12-02 08:19:45,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30972 ImplicationChecksByTransitivity, 115.4s TimeCoverageRelationStatistics Valid=8631, Invalid=68375, Unknown=0, NotChecked=0, Total=77006 [2023-12-02 08:19:45,851 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1999 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:45,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1999 Valid, 1733 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 08:19:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-12-02 08:19:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 358. [2023-12-02 08:19:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.1288515406162465) internal successors, (403), 357 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:19:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 403 transitions. [2023-12-02 08:19:45,902 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 403 transitions. Word has length 81 [2023-12-02 08:19:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:45,902 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 403 transitions. [2023-12-02 08:19:45,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.4) internal successors, (238), 69 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:19:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 403 transitions. [2023-12-02 08:19:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 08:19:45,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:45,904 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:45,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 08:19:46,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 08:19:46,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:46,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1958606298, now seen corresponding path program 1 times [2023-12-02 08:19:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:46,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340261892] [2023-12-02 08:19:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:46,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:19:49,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340261892] [2023-12-02 08:19:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340261892] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424160137] [2023-12-02 08:19:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:49,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:49,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:49,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:19:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:49,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 08:19:49,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 08:19:58,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:20:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:20:17,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424160137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:20:17,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734770594] [2023-12-02 08:20:17,451 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:20:17,451 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:20:17,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:20:17,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:20:17,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:20:25,249 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:20:30,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19077#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:20:30,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:20:30,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:20:30,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2023-12-02 08:20:30,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535101286] [2023-12-02 08:20:30,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:20:30,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-02 08:20:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-02 08:20:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=8628, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 08:20:30,823 INFO L87 Difference]: Start difference. First operand 358 states and 403 transitions. Second operand has 65 states, 65 states have (on average 3.8923076923076922) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:21:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:10,607 INFO L93 Difference]: Finished difference Result 1200 states and 1363 transitions. [2023-12-02 08:21:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-12-02 08:21:10,607 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.8923076923076922) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-12-02 08:21:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:10,611 INFO L225 Difference]: With dead ends: 1200 [2023-12-02 08:21:10,611 INFO L226 Difference]: Without dead ends: 1062 [2023-12-02 08:21:10,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20970 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=4583, Invalid=52299, Unknown=0, NotChecked=0, Total=56882 [2023-12-02 08:21:10,614 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 2083 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:10,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2083 Valid, 1704 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 08:21:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2023-12-02 08:21:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 406. [2023-12-02 08:21:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.1358024691358024) internal successors, (460), 405 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:21:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 460 transitions. [2023-12-02 08:21:10,686 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 460 transitions. Word has length 87 [2023-12-02 08:21:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:10,686 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 460 transitions. [2023-12-02 08:21:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.8923076923076922) internal successors, (253), 64 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:21:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 460 transitions. [2023-12-02 08:21:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 08:21:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:10,688 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:21:10,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:21:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 08:21:10,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:10,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -346522047, now seen corresponding path program 1 times [2023-12-02 08:21:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:10,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947387262] [2023-12-02 08:21:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:16,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947387262] [2023-12-02 08:21:16,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947387262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257132642] [2023-12-02 08:21:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:16,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:16,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:16,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 08:21:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:16,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 08:21:16,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 30 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:23,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 18 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:21:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257132642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484706483] [2023-12-02 08:21:32,651 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:21:32,652 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:32,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:32,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:32,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:44,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:51,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22026#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:21:51,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:51,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:21:51,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 27, 25] total 86 [2023-12-02 08:21:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591875936] [2023-12-02 08:21:51,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-12-02 08:21:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-12-02 08:21:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=12626, Unknown=0, NotChecked=0, Total=13806 [2023-12-02 08:21:51,189 INFO L87 Difference]: Start difference. First operand 406 states and 460 transitions. Second operand has 87 states, 87 states have (on average 4.183908045977011) internal successors, (364), 86 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:22:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:30,776 INFO L93 Difference]: Finished difference Result 1653 states and 1868 transitions. [2023-12-02 08:22:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2023-12-02 08:22:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.183908045977011) internal successors, (364), 86 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-12-02 08:22:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:30,781 INFO L225 Difference]: With dead ends: 1653 [2023-12-02 08:22:30,781 INFO L226 Difference]: Without dead ends: 1392 [2023-12-02 08:22:30,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40513 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=11153, Invalid=102753, Unknown=0, NotChecked=0, Total=113906 [2023-12-02 08:22:30,786 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2137 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 4708 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 5137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 4708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:30,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 2812 Invalid, 5137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 4708 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 08:22:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2023-12-02 08:22:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 477. [2023-12-02 08:22:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.1302521008403361) internal successors, (538), 476 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:22:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 538 transitions. [2023-12-02 08:22:30,958 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 538 transitions. Word has length 123 [2023-12-02 08:22:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:30,958 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 538 transitions. [2023-12-02 08:22:30,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.183908045977011) internal successors, (364), 86 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:22:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 538 transitions. [2023-12-02 08:22:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 08:22:30,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:30,959 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 8, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:30,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 08:22:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 08:22:31,160 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:22:31,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash -757251541, now seen corresponding path program 1 times [2023-12-02 08:22:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:31,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568092185] [2023-12-02 08:22:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:22:41,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:41,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568092185] [2023-12-02 08:22:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568092185] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:22:41,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450872345] [2023-12-02 08:22:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:41,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:41,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:41,845 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:41,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 08:22:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:41,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-02 08:22:42,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 37 proven. 283 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 08:23:03,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:23:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 138 proven. 178 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 08:23:44,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450872345] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:23:44,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007495938] [2023-12-02 08:23:44,087 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 08:23:44,087 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:23:44,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:23:44,088 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:23:44,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:59,011 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:24:05,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25794#(and (<= 0 (+ |ULTIMATE.start_eval_~tmp~0#1| 2147483648)) (not (= ~d~0 (+ |ULTIMATE.start_write_loop_~t~0#1| 1))) (<= |ULTIMATE.start_eval_~tmp~0#1| 2147483647) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~wl_st~0 1) (= ~t_b~0 |ULTIMATE.start_write_loop_~t~0#1|) (= 2 ~wl_pc~0) (not (= ~d~0 (+ 2 |ULTIMATE.start_write_loop_~t~0#1|))))' at error location [2023-12-02 08:24:05,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:24:05,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:24:05,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36, 28] total 101 [2023-12-02 08:24:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459993715] [2023-12-02 08:24:05,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:24:05,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-02 08:24:05,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-02 08:24:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1532, Invalid=15760, Unknown=0, NotChecked=0, Total=17292 [2023-12-02 08:24:05,885 INFO L87 Difference]: Start difference. First operand 477 states and 538 transitions. Second operand has 101 states, 101 states have (on average 3.782178217821782) internal successors, (382), 101 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:24:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:39,800 INFO L93 Difference]: Finished difference Result 1126 states and 1267 transitions. [2023-12-02 08:24:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-12-02 08:24:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.782178217821782) internal successors, (382), 101 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2023-12-02 08:24:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:39,801 INFO L225 Difference]: With dead ends: 1126 [2023-12-02 08:24:39,801 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 08:24:39,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 339 SyntacticMatches, 4 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25413 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=7072, Invalid=63418, Unknown=0, NotChecked=0, Total=70490 [2023-12-02 08:24:39,805 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 2205 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:39,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 2481 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 4374 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 08:24:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 08:24:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 08:24:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:24:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 08:24:39,806 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2023-12-02 08:24:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:39,806 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 08:24:39,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.782178217821782) internal successors, (382), 101 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:24:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 08:24:39,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 08:24:39,808 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 08:24:39,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 08:24:40,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3927886-d017-4540-9077-5d58829c11ca/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:40,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 08:24:52,844 WARN L293 SmtUtils]: Spent 12.83s on a formula simplification. DAG size of input: 440 DAG size of output: 262 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)