/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:26:59,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:26:59,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:26:59,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 00:26:59,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:26:59,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:26:59,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:26:59,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:26:59,310 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:26:59,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:26:59,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:26:59,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:26:59,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:26:59,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:26:59,312 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:26:59,312 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:26:59,312 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:26:59,312 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:26:59,312 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:26:59,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:26:59,317 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:26:59,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:26:59,317 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:26:59,317 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:26:59,317 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:26:59,318 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:26:59,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:26:59,318 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:26:59,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:26:59,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:26:59,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:26:59,320 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:26:59,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:26:59,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:26:59,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:26:59,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:26:59,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:26:59,321 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:26:59,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:26:59,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:26:59,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:26:59,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:26:59,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:26:59,552 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:26:59,552 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:26:59,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 00:27:00,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:27:00,947 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:27:00,948 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 00:27:00,963 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0503b3496/d9ec4905bf49422c9a5c541b88d816e9/FLAG5471a56b4 [2023-04-01 00:27:00,974 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0503b3496/d9ec4905bf49422c9a5c541b88d816e9 [2023-04-01 00:27:00,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:27:00,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:27:00,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:00,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:27:00,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:27:00,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:00" (1/1) ... [2023-04-01 00:27:00,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9f67a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:00, skipping insertion in model container [2023-04-01 00:27:00,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:27:00" (1/1) ... [2023-04-01 00:27:00,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:27:01,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:27:01,266 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-01 00:27:01,323 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-01 00:27:01,332 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-01 00:27:01,347 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-01 00:27:01,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:01,542 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:27:01,625 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[8127,8140] [2023-04-01 00:27:01,671 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[14997,15010] [2023-04-01 00:27:01,685 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17084,17097] [2023-04-01 00:27:01,690 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18108,18121] [2023-04-01 00:27:01,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:27:01,801 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:27:01,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01 WrapperNode [2023-04-01 00:27:01,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:27:01,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:27:01,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:27:01,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:27:01,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:27:01,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:27:01,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:27:01,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:27:01,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (1/1) ... [2023-04-01 00:27:01,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:27:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:27:01,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:27:02,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:27:02,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:27:02,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:27:02,022 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:27:02,022 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:27:02,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:27:02,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:27:02,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:27:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:27:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:27:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:27:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:27:02,249 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:27:02,250 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:27:03,458 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:27:03,612 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:27:03,612 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 00:27:03,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:03 BoogieIcfgContainer [2023-04-01 00:27:03,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:27:03,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:27:03,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:27:03,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:27:03,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:27:00" (1/3) ... [2023-04-01 00:27:03,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337277a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:03, skipping insertion in model container [2023-04-01 00:27:03,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:27:01" (2/3) ... [2023-04-01 00:27:03,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337277a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:27:03, skipping insertion in model container [2023-04-01 00:27:03,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:27:03" (3/3) ... [2023-04-01 00:27:03,625 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2023-04-01 00:27:03,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:27:03,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-04-01 00:27:03,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:27:03,698 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=LoopsAndPotentialCycles, 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;@34171d92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:27:03,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-04-01 00:27:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 00:27:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:27:03,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:03,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:03,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:03,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1562041499, now seen corresponding path program 1 times [2023-04-01 00:27:03,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:03,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013316854] [2023-04-01 00:27:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:03,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:04,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:04,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013316854] [2023-04-01 00:27:04,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013316854] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:04,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:04,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:04,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064772703] [2023-04-01 00:27:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:04,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:04,247 INFO L87 Difference]: Start difference. First operand has 432 states, 423 states have (on average 1.8557919621749408) internal successors, (785), 427 states have internal predecessors, (785), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:04,450 INFO L93 Difference]: Finished difference Result 648 states and 1132 transitions. [2023-04-01 00:27:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:27:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:04,472 INFO L225 Difference]: With dead ends: 648 [2023-04-01 00:27:04,473 INFO L226 Difference]: Without dead ends: 519 [2023-04-01 00:27:04,481 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 [2023-04-01 00:27:04,487 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 397 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:04,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1300 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-04-01 00:27:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2023-04-01 00:27:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 506 states have (on average 1.3122529644268774) internal successors, (664), 509 states have internal predecessors, (664), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 667 transitions. [2023-04-01 00:27:04,598 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 667 transitions. Word has length 53 [2023-04-01 00:27:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:04,598 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 667 transitions. [2023-04-01 00:27:04,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 667 transitions. [2023-04-01 00:27:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:27:04,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:04,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:04,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:27:04,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:04,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1181913160, now seen corresponding path program 1 times [2023-04-01 00:27:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:04,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025684475] [2023-04-01 00:27:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:04,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025684475] [2023-04-01 00:27:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025684475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:04,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:04,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855316167] [2023-04-01 00:27:04,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:04,906 INFO L87 Difference]: Start difference. First operand 513 states and 667 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:05,310 INFO L93 Difference]: Finished difference Result 904 states and 1198 transitions. [2023-04-01 00:27:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:27:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:05,315 INFO L225 Difference]: With dead ends: 904 [2023-04-01 00:27:05,315 INFO L226 Difference]: Without dead ends: 603 [2023-04-01 00:27:05,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:05,320 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1575 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:05,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1575 Valid, 351 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-04-01 00:27:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2023-04-01 00:27:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 589 states have (on average 1.3089983022071308) internal successors, (771), 592 states have internal predecessors, (771), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 774 transitions. [2023-04-01 00:27:05,359 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 774 transitions. Word has length 53 [2023-04-01 00:27:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:05,360 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 774 transitions. [2023-04-01 00:27:05,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 774 transitions. [2023-04-01 00:27:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:27:05,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:05,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:05,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:27:05,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:05,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1075872229, now seen corresponding path program 1 times [2023-04-01 00:27:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464289604] [2023-04-01 00:27:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:05,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464289604] [2023-04-01 00:27:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464289604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:05,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653254005] [2023-04-01 00:27:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:05,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:05,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:05,470 INFO L87 Difference]: Start difference. First operand 596 states and 774 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:05,609 INFO L93 Difference]: Finished difference Result 1049 states and 1419 transitions. [2023-04-01 00:27:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:05,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:27:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:05,615 INFO L225 Difference]: With dead ends: 1049 [2023-04-01 00:27:05,616 INFO L226 Difference]: Without dead ends: 817 [2023-04-01 00:27:05,616 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 [2023-04-01 00:27:05,618 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 262 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:05,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 797 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-04-01 00:27:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 810. [2023-04-01 00:27:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 803 states have (on average 1.3387297633872977) internal successors, (1075), 806 states have internal predecessors, (1075), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1078 transitions. [2023-04-01 00:27:05,710 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1078 transitions. Word has length 53 [2023-04-01 00:27:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:05,712 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 1078 transitions. [2023-04-01 00:27:05,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1078 transitions. [2023-04-01 00:27:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 00:27:05,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:05,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:27:05,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:05,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash -557475636, now seen corresponding path program 1 times [2023-04-01 00:27:05,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:05,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175539578] [2023-04-01 00:27:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:05,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:05,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:05,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175539578] [2023-04-01 00:27:05,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175539578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:05,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:05,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415381110] [2023-04-01 00:27:05,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:05,907 INFO L87 Difference]: Start difference. First operand 810 states and 1078 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:06,265 INFO L93 Difference]: Finished difference Result 1764 states and 2419 transitions. [2023-04-01 00:27:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 00:27:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:06,271 INFO L225 Difference]: With dead ends: 1764 [2023-04-01 00:27:06,271 INFO L226 Difference]: Without dead ends: 1109 [2023-04-01 00:27:06,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:06,278 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1401 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:06,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 341 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-01 00:27:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1103. [2023-04-01 00:27:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1096 states have (on average 1.3713503649635037) internal successors, (1503), 1099 states have internal predecessors, (1503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1506 transitions. [2023-04-01 00:27:06,391 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1506 transitions. Word has length 53 [2023-04-01 00:27:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:06,391 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 1506 transitions. [2023-04-01 00:27:06,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1506 transitions. [2023-04-01 00:27:06,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 00:27:06,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:06,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:06,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:27:06,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:06,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 511774487, now seen corresponding path program 1 times [2023-04-01 00:27:06,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:06,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266328117] [2023-04-01 00:27:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:06,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266328117] [2023-04-01 00:27:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266328117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:06,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097178742] [2023-04-01 00:27:06,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:06,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:06,608 INFO L87 Difference]: Start difference. First operand 1103 states and 1506 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:07,060 INFO L93 Difference]: Finished difference Result 2817 states and 3934 transitions. [2023-04-01 00:27:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-01 00:27:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:07,067 INFO L225 Difference]: With dead ends: 2817 [2023-04-01 00:27:07,067 INFO L226 Difference]: Without dead ends: 1804 [2023-04-01 00:27:07,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:07,069 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1177 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:07,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 309 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 00:27:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2023-04-01 00:27:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1798. [2023-04-01 00:27:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1791 states have (on average 1.379676158570631) internal successors, (2471), 1794 states have internal predecessors, (2471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2474 transitions. [2023-04-01 00:27:07,249 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2474 transitions. Word has length 54 [2023-04-01 00:27:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:07,249 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2474 transitions. [2023-04-01 00:27:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2474 transitions. [2023-04-01 00:27:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 00:27:07,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:07,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 00:27:07,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:07,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash -235024366, now seen corresponding path program 1 times [2023-04-01 00:27:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518744325] [2023-04-01 00:27:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:07,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518744325] [2023-04-01 00:27:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518744325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:07,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:07,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4775594] [2023-04-01 00:27:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:07,321 INFO L87 Difference]: Start difference. First operand 1798 states and 2474 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:07,713 INFO L93 Difference]: Finished difference Result 4562 states and 6318 transitions. [2023-04-01 00:27:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 00:27:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:07,724 INFO L225 Difference]: With dead ends: 4562 [2023-04-01 00:27:07,725 INFO L226 Difference]: Without dead ends: 2934 [2023-04-01 00:27:07,728 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 [2023-04-01 00:27:07,729 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 247 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:07,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 665 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2023-04-01 00:27:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2928. [2023-04-01 00:27:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2921 states have (on average 1.3622047244094488) internal successors, (3979), 2924 states have internal predecessors, (3979), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3982 transitions. [2023-04-01 00:27:08,090 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3982 transitions. Word has length 55 [2023-04-01 00:27:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:08,091 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3982 transitions. [2023-04-01 00:27:08,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3982 transitions. [2023-04-01 00:27:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:27:08,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:08,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:08,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 00:27:08,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:08,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 902638482, now seen corresponding path program 1 times [2023-04-01 00:27:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:08,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074617076] [2023-04-01 00:27:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:08,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074617076] [2023-04-01 00:27:08,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074617076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:08,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:08,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:08,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379539440] [2023-04-01 00:27:08,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:08,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:08,249 INFO L87 Difference]: Start difference. First operand 2928 states and 3982 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:09,787 INFO L93 Difference]: Finished difference Result 9739 states and 13408 transitions. [2023-04-01 00:27:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:27:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:27:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:09,821 INFO L225 Difference]: With dead ends: 9739 [2023-04-01 00:27:09,821 INFO L226 Difference]: Without dead ends: 8644 [2023-04-01 00:27:09,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:27:09,829 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 2286 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:09,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2286 Valid, 515 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8644 states. [2023-04-01 00:27:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8644 to 2942. [2023-04-01 00:27:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2935 states have (on average 1.361839863713799) internal successors, (3997), 2938 states have internal predecessors, (3997), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4000 transitions. [2023-04-01 00:27:10,367 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4000 transitions. Word has length 56 [2023-04-01 00:27:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:10,368 INFO L495 AbstractCegarLoop]: Abstraction has 2942 states and 4000 transitions. [2023-04-01 00:27:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4000 transitions. [2023-04-01 00:27:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:27:10,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:10,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 00:27:10,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:10,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1067316345, now seen corresponding path program 1 times [2023-04-01 00:27:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945026583] [2023-04-01 00:27:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:10,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945026583] [2023-04-01 00:27:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945026583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105409295] [2023-04-01 00:27:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:10,527 INFO L87 Difference]: Start difference. First operand 2942 states and 4000 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:12,601 INFO L93 Difference]: Finished difference Result 10795 states and 14944 transitions. [2023-04-01 00:27:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:27:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:27:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:12,638 INFO L225 Difference]: With dead ends: 10795 [2023-04-01 00:27:12,638 INFO L226 Difference]: Without dead ends: 9855 [2023-04-01 00:27:12,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:27:12,644 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1772 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:12,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 607 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2023-04-01 00:27:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 2964. [2023-04-01 00:27:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 2957 states have (on average 1.3621914102130537) internal successors, (4028), 2960 states have internal predecessors, (4028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4031 transitions. [2023-04-01 00:27:13,263 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4031 transitions. Word has length 56 [2023-04-01 00:27:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:13,264 INFO L495 AbstractCegarLoop]: Abstraction has 2964 states and 4031 transitions. [2023-04-01 00:27:13,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4031 transitions. [2023-04-01 00:27:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 00:27:13,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:13,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:13,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 00:27:13,268 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:13,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash -269158967, now seen corresponding path program 1 times [2023-04-01 00:27:13,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:13,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312594811] [2023-04-01 00:27:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:13,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:13,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312594811] [2023-04-01 00:27:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312594811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 00:27:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811104653] [2023-04-01 00:27:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 00:27:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 00:27:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 00:27:13,454 INFO L87 Difference]: Start difference. First operand 2964 states and 4031 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:15,865 INFO L93 Difference]: Finished difference Result 12806 states and 17757 transitions. [2023-04-01 00:27:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 00:27:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 00:27:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:15,895 INFO L225 Difference]: With dead ends: 12806 [2023-04-01 00:27:15,896 INFO L226 Difference]: Without dead ends: 11752 [2023-04-01 00:27:15,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:27:15,903 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 2602 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:15,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 547 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11752 states. [2023-04-01 00:27:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11752 to 2998. [2023-04-01 00:27:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2991 states have (on average 1.3614175860916082) internal successors, (4072), 2994 states have internal predecessors, (4072), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 4075 transitions. [2023-04-01 00:27:16,598 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 4075 transitions. Word has length 56 [2023-04-01 00:27:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:16,601 INFO L495 AbstractCegarLoop]: Abstraction has 2998 states and 4075 transitions. [2023-04-01 00:27:16,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 4075 transitions. [2023-04-01 00:27:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:27:16,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:16,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:16,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 00:27:16,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:16,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1744464723, now seen corresponding path program 1 times [2023-04-01 00:27:16,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:16,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393384992] [2023-04-01 00:27:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:16,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:16,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:16,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393384992] [2023-04-01 00:27:16,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393384992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:16,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 00:27:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644839861] [2023-04-01 00:27:16,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:16,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 00:27:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 00:27:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 00:27:16,952 INFO L87 Difference]: Start difference. First operand 2998 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:18,346 INFO L93 Difference]: Finished difference Result 7050 states and 9709 transitions. [2023-04-01 00:27:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 00:27:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:27:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:18,358 INFO L225 Difference]: With dead ends: 7050 [2023-04-01 00:27:18,358 INFO L226 Difference]: Without dead ends: 5018 [2023-04-01 00:27:18,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-04-01 00:27:18,363 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1937 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:18,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1937 Valid, 732 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2023-04-01 00:27:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 2920. [2023-04-01 00:27:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2913 states have (on average 1.3601098523858566) internal successors, (3962), 2916 states have internal predecessors, (3962), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 3965 transitions. [2023-04-01 00:27:18,996 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 3965 transitions. Word has length 57 [2023-04-01 00:27:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:18,997 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 3965 transitions. [2023-04-01 00:27:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 3965 transitions. [2023-04-01 00:27:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:27:19,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:19,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:19,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 00:27:19,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:19,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1364336384, now seen corresponding path program 1 times [2023-04-01 00:27:19,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:19,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644294084] [2023-04-01 00:27:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:19,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644294084] [2023-04-01 00:27:19,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644294084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:19,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:27:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113399496] [2023-04-01 00:27:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:27:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:27:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:27:19,369 INFO L87 Difference]: Start difference. First operand 2920 states and 3965 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:22,049 INFO L93 Difference]: Finished difference Result 10791 states and 14878 transitions. [2023-04-01 00:27:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 00:27:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:27:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:22,075 INFO L225 Difference]: With dead ends: 10791 [2023-04-01 00:27:22,075 INFO L226 Difference]: Without dead ends: 8889 [2023-04-01 00:27:22,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 00:27:22,083 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1386 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:22,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 1385 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 00:27:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2023-04-01 00:27:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 2891. [2023-04-01 00:27:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3595700416088765) internal successors, (3921), 2887 states have internal predecessors, (3921), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3924 transitions. [2023-04-01 00:27:22,767 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3924 transitions. Word has length 57 [2023-04-01 00:27:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:22,768 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3924 transitions. [2023-04-01 00:27:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3924 transitions. [2023-04-01 00:27:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 00:27:22,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:22,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:22,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 00:27:22,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:22,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1876570328, now seen corresponding path program 1 times [2023-04-01 00:27:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:22,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607211068] [2023-04-01 00:27:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:23,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:23,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607211068] [2023-04-01 00:27:23,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607211068] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:23,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:23,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 00:27:23,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642355086] [2023-04-01 00:27:23,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:23,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 00:27:23,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 00:27:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 00:27:23,082 INFO L87 Difference]: Start difference. First operand 2891 states and 3924 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:25,068 INFO L93 Difference]: Finished difference Result 6009 states and 8187 transitions. [2023-04-01 00:27:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:27:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 00:27:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:25,081 INFO L225 Difference]: With dead ends: 6009 [2023-04-01 00:27:25,081 INFO L226 Difference]: Without dead ends: 6004 [2023-04-01 00:27:25,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2023-04-01 00:27:25,085 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1795 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:25,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 1069 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 00:27:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2023-04-01 00:27:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 2891. [2023-04-01 00:27:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.358876560332871) internal successors, (3919), 2887 states have internal predecessors, (3919), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3922 transitions. [2023-04-01 00:27:25,785 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3922 transitions. Word has length 57 [2023-04-01 00:27:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:25,785 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3922 transitions. [2023-04-01 00:27:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3922 transitions. [2023-04-01 00:27:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:25,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:25,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:25,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 00:27:25,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:25,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1385910251, now seen corresponding path program 1 times [2023-04-01 00:27:25,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96444281] [2023-04-01 00:27:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:25,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:25,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96444281] [2023-04-01 00:27:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96444281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:25,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:25,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029960214] [2023-04-01 00:27:25,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:25,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:25,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:25,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:25,853 INFO L87 Difference]: Start difference. First operand 2891 states and 3922 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:26,692 INFO L93 Difference]: Finished difference Result 3950 states and 5384 transitions. [2023-04-01 00:27:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:27:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:26,698 INFO L225 Difference]: With dead ends: 3950 [2023-04-01 00:27:26,698 INFO L226 Difference]: Without dead ends: 2898 [2023-04-01 00:27:26,700 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 [2023-04-01 00:27:26,700 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 180 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:26,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 673 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2023-04-01 00:27:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2891. [2023-04-01 00:27:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3422330097087378) internal successors, (3871), 2887 states have internal predecessors, (3871), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3874 transitions. [2023-04-01 00:27:27,515 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3874 transitions. Word has length 58 [2023-04-01 00:27:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:27,515 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3874 transitions. [2023-04-01 00:27:27,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3874 transitions. [2023-04-01 00:27:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:27,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:27,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:27,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 00:27:27,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:27,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1495666947, now seen corresponding path program 1 times [2023-04-01 00:27:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:27,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059832121] [2023-04-01 00:27:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:27,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:27,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059832121] [2023-04-01 00:27:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059832121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:27,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:27,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:27,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883294446] [2023-04-01 00:27:27,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:27,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:27,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:27,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:27,592 INFO L87 Difference]: Start difference. First operand 2891 states and 3874 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:28,480 INFO L93 Difference]: Finished difference Result 4011 states and 5400 transitions. [2023-04-01 00:27:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:27:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:28,486 INFO L225 Difference]: With dead ends: 4011 [2023-04-01 00:27:28,486 INFO L226 Difference]: Without dead ends: 2897 [2023-04-01 00:27:28,491 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 [2023-04-01 00:27:28,491 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 196 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:28,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 679 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-04-01 00:27:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2891. [2023-04-01 00:27:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2891 states, 2884 states have (on average 1.3269764216366158) internal successors, (3827), 2887 states have internal predecessors, (3827), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2891 states to 2891 states and 3830 transitions. [2023-04-01 00:27:29,361 INFO L78 Accepts]: Start accepts. Automaton has 2891 states and 3830 transitions. Word has length 58 [2023-04-01 00:27:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 2891 states and 3830 transitions. [2023-04-01 00:27:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2891 states and 3830 transitions. [2023-04-01 00:27:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 00:27:29,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:29,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:29,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 00:27:29,365 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:29,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 958916556, now seen corresponding path program 1 times [2023-04-01 00:27:29,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:29,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812847235] [2023-04-01 00:27:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:29,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812847235] [2023-04-01 00:27:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812847235] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904921863] [2023-04-01 00:27:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:29,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:29,428 INFO L87 Difference]: Start difference. First operand 2891 states and 3830 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:30,354 INFO L93 Difference]: Finished difference Result 4040 states and 5383 transitions. [2023-04-01 00:27:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2023-04-01 00:27:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:30,358 INFO L225 Difference]: With dead ends: 4040 [2023-04-01 00:27:30,358 INFO L226 Difference]: Without dead ends: 2882 [2023-04-01 00:27:30,361 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 [2023-04-01 00:27:30,362 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 216 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:30,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 699 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2023-04-01 00:27:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2876. [2023-04-01 00:27:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2869 states have (on average 1.3067270826071802) internal successors, (3749), 2872 states have internal predecessors, (3749), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 3752 transitions. [2023-04-01 00:27:31,277 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 3752 transitions. Word has length 58 [2023-04-01 00:27:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:31,278 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 3752 transitions. [2023-04-01 00:27:31,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 3752 transitions. [2023-04-01 00:27:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 00:27:31,281 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:31,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:31,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 00:27:31,282 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:31,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -172349180, now seen corresponding path program 1 times [2023-04-01 00:27:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:31,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455953428] [2023-04-01 00:27:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:31,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455953428] [2023-04-01 00:27:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455953428] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:31,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16842747] [2023-04-01 00:27:31,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:31,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:31,339 INFO L87 Difference]: Start difference. First operand 2876 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:32,243 INFO L93 Difference]: Finished difference Result 4523 states and 5951 transitions. [2023-04-01 00:27:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-01 00:27:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:32,249 INFO L225 Difference]: With dead ends: 4523 [2023-04-01 00:27:32,249 INFO L226 Difference]: Without dead ends: 3222 [2023-04-01 00:27:32,253 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 [2023-04-01 00:27:32,253 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 284 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:32,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 481 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2023-04-01 00:27:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 2666. [2023-04-01 00:27:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2659 states have (on average 1.305377961639714) internal successors, (3471), 2662 states have internal predecessors, (3471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3474 transitions. [2023-04-01 00:27:32,987 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3474 transitions. Word has length 59 [2023-04-01 00:27:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:32,987 INFO L495 AbstractCegarLoop]: Abstraction has 2666 states and 3474 transitions. [2023-04-01 00:27:32,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3474 transitions. [2023-04-01 00:27:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:32,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:32,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 00:27:32,990 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:32,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1005451477, now seen corresponding path program 1 times [2023-04-01 00:27:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048757805] [2023-04-01 00:27:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:33,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048757805] [2023-04-01 00:27:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048757805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:33,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:33,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-01 00:27:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444731640] [2023-04-01 00:27:33,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 00:27:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 00:27:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-04-01 00:27:33,620 INFO L87 Difference]: Start difference. First operand 2666 states and 3474 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:35,493 INFO L93 Difference]: Finished difference Result 4161 states and 5441 transitions. [2023-04-01 00:27:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 00:27:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:27:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:35,498 INFO L225 Difference]: With dead ends: 4161 [2023-04-01 00:27:35,498 INFO L226 Difference]: Without dead ends: 4157 [2023-04-01 00:27:35,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:27:35,499 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 1975 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:35,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1975 Valid, 2874 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 00:27:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2023-04-01 00:27:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2662. [2023-04-01 00:27:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2656 states have (on average 1.3049698795180722) internal successors, (3466), 2658 states have internal predecessors, (3466), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3469 transitions. [2023-04-01 00:27:36,269 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3469 transitions. Word has length 60 [2023-04-01 00:27:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3469 transitions. [2023-04-01 00:27:36,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3469 transitions. [2023-04-01 00:27:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:36,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:36,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:36,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 00:27:36,272 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:36,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1468288075, now seen corresponding path program 1 times [2023-04-01 00:27:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956353404] [2023-04-01 00:27:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:36,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:36,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956353404] [2023-04-01 00:27:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956353404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:36,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:36,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 00:27:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919315104] [2023-04-01 00:27:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 00:27:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 00:27:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 00:27:36,768 INFO L87 Difference]: Start difference. First operand 2662 states and 3469 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:38,920 INFO L93 Difference]: Finished difference Result 4420 states and 5794 transitions. [2023-04-01 00:27:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 00:27:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:27:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:38,925 INFO L225 Difference]: With dead ends: 4420 [2023-04-01 00:27:38,925 INFO L226 Difference]: Without dead ends: 3922 [2023-04-01 00:27:38,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-04-01 00:27:38,928 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 1842 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:38,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 1597 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 00:27:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2023-04-01 00:27:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 2604. [2023-04-01 00:27:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2599 states have (on average 1.305886879569065) internal successors, (3394), 2600 states have internal predecessors, (3394), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3397 transitions. [2023-04-01 00:27:39,737 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3397 transitions. Word has length 60 [2023-04-01 00:27:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:39,738 INFO L495 AbstractCegarLoop]: Abstraction has 2604 states and 3397 transitions. [2023-04-01 00:27:39,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3397 transitions. [2023-04-01 00:27:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:39,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:39,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:39,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 00:27:39,741 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:39,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:39,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2011747672, now seen corresponding path program 1 times [2023-04-01 00:27:39,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:39,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011353787] [2023-04-01 00:27:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:39,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:39,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011353787] [2023-04-01 00:27:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011353787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:39,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:39,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:39,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488012492] [2023-04-01 00:27:39,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:39,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:39,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:39,803 INFO L87 Difference]: Start difference. First operand 2604 states and 3397 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:41,242 INFO L93 Difference]: Finished difference Result 4359 states and 5705 transitions. [2023-04-01 00:27:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:27:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:41,246 INFO L225 Difference]: With dead ends: 4359 [2023-04-01 00:27:41,246 INFO L226 Difference]: Without dead ends: 2998 [2023-04-01 00:27:41,248 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 [2023-04-01 00:27:41,248 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 215 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:41,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2023-04-01 00:27:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2447. [2023-04-01 00:27:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2443 states have (on average 1.3057715923045436) internal successors, (3190), 2443 states have internal predecessors, (3190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3193 transitions. [2023-04-01 00:27:42,067 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3193 transitions. Word has length 60 [2023-04-01 00:27:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3193 transitions. [2023-04-01 00:27:42,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3193 transitions. [2023-04-01 00:27:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 00:27:42,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:42,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:42,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 00:27:42,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:42,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash 876443249, now seen corresponding path program 1 times [2023-04-01 00:27:42,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:42,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857847129] [2023-04-01 00:27:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:42,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:42,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:42,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857847129] [2023-04-01 00:27:42,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857847129] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:42,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 00:27:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140819529] [2023-04-01 00:27:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 00:27:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 00:27:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:42,205 INFO L87 Difference]: Start difference. First operand 2447 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:43,163 INFO L93 Difference]: Finished difference Result 2453 states and 3196 transitions. [2023-04-01 00:27:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 00:27:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-04-01 00:27:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:43,167 INFO L225 Difference]: With dead ends: 2453 [2023-04-01 00:27:43,167 INFO L226 Difference]: Without dead ends: 2126 [2023-04-01 00:27:43,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 00:27:43,171 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 442 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:43,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 670 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 00:27:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2023-04-01 00:27:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2122. [2023-04-01 00:27:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2118 states have (on average 1.3031161473087818) internal successors, (2760), 2118 states have internal predecessors, (2760), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2763 transitions. [2023-04-01 00:27:43,939 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2763 transitions. Word has length 60 [2023-04-01 00:27:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:43,939 INFO L495 AbstractCegarLoop]: Abstraction has 2122 states and 2763 transitions. [2023-04-01 00:27:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2763 transitions. [2023-04-01 00:27:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 00:27:43,942 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:43,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:43,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 00:27:43,942 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:43,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1569536683, now seen corresponding path program 1 times [2023-04-01 00:27:43,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:43,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976676175] [2023-04-01 00:27:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:44,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976676175] [2023-04-01 00:27:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976676175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:44,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:44,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720996534] [2023-04-01 00:27:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:44,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:44,090 INFO L87 Difference]: Start difference. First operand 2122 states and 2763 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:45,286 INFO L93 Difference]: Finished difference Result 3894 states and 5173 transitions. [2023-04-01 00:27:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-01 00:27:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:45,290 INFO L225 Difference]: With dead ends: 3894 [2023-04-01 00:27:45,290 INFO L226 Difference]: Without dead ends: 2876 [2023-04-01 00:27:45,292 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 [2023-04-01 00:27:45,293 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 113 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:45,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 470 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-04-01 00:27:46,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2682. [2023-04-01 00:27:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2678 states have (on average 1.2976101568334577) internal successors, (3475), 2678 states have internal predecessors, (3475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 3478 transitions. [2023-04-01 00:27:46,326 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 3478 transitions. Word has length 61 [2023-04-01 00:27:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:46,326 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 3478 transitions. [2023-04-01 00:27:46,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 3478 transitions. [2023-04-01 00:27:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 00:27:46,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:46,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 00:27:46,329 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:46,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1583937969, now seen corresponding path program 1 times [2023-04-01 00:27:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122338469] [2023-04-01 00:27:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:46,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122338469] [2023-04-01 00:27:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122338469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:46,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:46,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522713750] [2023-04-01 00:27:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:46,439 INFO L87 Difference]: Start difference. First operand 2682 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:27:47,959 INFO L93 Difference]: Finished difference Result 5296 states and 7007 transitions. [2023-04-01 00:27:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 00:27:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-01 00:27:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:27:47,965 INFO L225 Difference]: With dead ends: 5296 [2023-04-01 00:27:47,966 INFO L226 Difference]: Without dead ends: 3858 [2023-04-01 00:27:47,967 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 [2023-04-01 00:27:47,968 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 101 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 00:27:47,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 458 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 00:27:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2023-04-01 00:27:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3448. [2023-04-01 00:27:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3444 states have (on average 1.2944250871080138) internal successors, (4458), 3444 states have internal predecessors, (4458), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 4461 transitions. [2023-04-01 00:27:49,281 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 4461 transitions. Word has length 64 [2023-04-01 00:27:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:27:49,281 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 4461 transitions. [2023-04-01 00:27:49,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 00:27:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 4461 transitions. [2023-04-01 00:27:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 00:27:49,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:27:49,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:27:49,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 00:27:49,284 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:27:49,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:27:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 138520932, now seen corresponding path program 1 times [2023-04-01 00:27:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:27:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978149373] [2023-04-01 00:27:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:27:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:27:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:27:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:27:49,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:27:49,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978149373] [2023-04-01 00:27:49,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978149373] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:27:49,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:27:49,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 00:27:49,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364234032] [2023-04-01 00:27:49,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:27:49,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 00:27:49,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:27:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 00:27:49,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 00:27:49,392 INFO L87 Difference]: Start difference. First operand 3448 states and 4461 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)