/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:36:57,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:36:57,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:36:57,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:36:57,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:36:57,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:36:57,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:36:57,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:36:57,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:36:57,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:36:57,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:36:57,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:36:57,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:36:57,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:36:57,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:36:57,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:36:57,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:36:57,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:36:57,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:36:57,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:36:57,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:36:57,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-01 12:36:57,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:36:57,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:36:57,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:36:57,354 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 12:36:57,380 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:36:57,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:36:57,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:36:57,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:36:57,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:36:57,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:36:57,382 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:36:57,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:36:57,383 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:36:57,383 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:36:57,383 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:36:57,384 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:36:57,384 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:36:57,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:36:57,385 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:36:57,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:36:57,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:36:57,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:36:57,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:36:57,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:36:57,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:36:57,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:36:57,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:36:57,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:36:57,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:36:57,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:36:57,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:36:57,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:36:57,633 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:36:57,634 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:36:57,635 INFO L432 ainManager$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+cfa-reducer.c [2023-04-01 12:36:58,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:36:58,917 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:36:58,918 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+cfa-reducer.c [2023-04-01 12:36:58,925 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e3d63c8/e016f414f2dc401eb05e92d326ec4038/FLAGc866d9e94 [2023-04-01 12:36:58,938 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e3d63c8/e016f414f2dc401eb05e92d326ec4038 [2023-04-01 12:36:58,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:36:58,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:36:58,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:36:58,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:36:58,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:36:58,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:36:58" (1/1) ... [2023-04-01 12:36:58,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4bf00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:58, skipping insertion in model container [2023-04-01 12:36:58,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:36:58" (1/1) ... [2023-04-01 12:36:58,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:36:58,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:36:59,202 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+cfa-reducer.c[4411,4424] [2023-04-01 12:36:59,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:36:59,263 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:36:59,303 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+cfa-reducer.c[4411,4424] [2023-04-01 12:36:59,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:36:59,352 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:36:59,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59 WrapperNode [2023-04-01 12:36:59,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:36:59,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:36:59,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:36:59,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:36:59,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,417 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:36:59,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:36:59,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:36:59,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:36:59,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (1/1) ... [2023-04-01 12:36:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:36:59,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:36:59,467 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 12:36:59,481 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 12:36:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:36:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:36:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:36:59,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:36:59,510 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:36:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:36:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:36:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:36:59,605 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:36:59,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:37:00,008 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:37:00,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:37:00,201 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:37:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:37:00 BoogieIcfgContainer [2023-04-01 12:37:00,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:37:00,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:37:00,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:37:00,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:37:00,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:36:58" (1/3) ... [2023-04-01 12:37:00,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c264345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:37:00, skipping insertion in model container [2023-04-01 12:37:00,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:36:59" (2/3) ... [2023-04-01 12:37:00,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c264345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:37:00, skipping insertion in model container [2023-04-01 12:37:00,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:37:00" (3/3) ... [2023-04-01 12:37:00,216 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:37:00,232 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:37:00,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:37:00,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:37:00,276 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;@2f82006, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:37:00,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:37:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 64 states have (on average 1.640625) internal successors, (105), 65 states have internal predecessors, (105), 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 12:37:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 12:37:00,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:00,287 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] [2023-04-01 12:37:00,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:00,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:00,291 INFO L85 PathProgramCache]: Analyzing trace with hash -246653396, now seen corresponding path program 1 times [2023-04-01 12:37:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:00,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576569579] [2023-04-01 12:37:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:00,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:00,696 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 12:37:00,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576569579] [2023-04-01 12:37:00,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576569579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:00,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:00,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480721914] [2023-04-01 12:37:00,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:00,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:00,749 INFO L87 Difference]: Start difference. First operand has 70 states, 64 states have (on average 1.640625) internal successors, (105), 65 states have internal predecessors, (105), 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 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 12:37:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:00,820 INFO L93 Difference]: Finished difference Result 153 states and 228 transitions. [2023-04-01 12:37:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2023-04-01 12:37:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:00,830 INFO L225 Difference]: With dead ends: 153 [2023-04-01 12:37:00,830 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 12:37:00,833 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 12:37:00,836 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 78 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:00,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 202 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 12:37:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-04-01 12:37:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 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 12:37:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2023-04-01 12:37:00,880 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 32 [2023-04-01 12:37:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:00,881 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2023-04-01 12:37:00,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 12:37:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2023-04-01 12:37:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 12:37:00,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:00,882 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] [2023-04-01 12:37:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:37:00,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:00,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1605806612, now seen corresponding path program 1 times [2023-04-01 12:37:00,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276205075] [2023-04-01 12:37:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:01,042 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 12:37:01,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276205075] [2023-04-01 12:37:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276205075] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:01,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455174792] [2023-04-01 12:37:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:01,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:01,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:01,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:01,046 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 12:37:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:01,152 INFO L93 Difference]: Finished difference Result 220 states and 316 transitions. [2023-04-01 12:37:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:01,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2023-04-01 12:37:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:01,156 INFO L225 Difference]: With dead ends: 220 [2023-04-01 12:37:01,156 INFO L226 Difference]: Without dead ends: 147 [2023-04-01 12:37:01,157 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 12:37:01,158 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 155 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:37:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-01 12:37:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-04-01 12:37:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 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 12:37:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2023-04-01 12:37:01,190 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 35 [2023-04-01 12:37:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:01,191 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2023-04-01 12:37:01,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 12:37:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2023-04-01 12:37:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:37:01,192 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:01,192 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] [2023-04-01 12:37:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:37:01,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:01,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1274847897, now seen corresponding path program 1 times [2023-04-01 12:37:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:01,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251764222] [2023-04-01 12:37:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:01,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:01,302 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 12:37:01,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251764222] [2023-04-01 12:37:01,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251764222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:01,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:01,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:37:01,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792986632] [2023-04-01 12:37:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:37:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:37:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:37:01,309 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 12:37:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:01,416 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2023-04-01 12:37:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:37:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2023-04-01 12:37:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:01,427 INFO L225 Difference]: With dead ends: 345 [2023-04-01 12:37:01,427 INFO L226 Difference]: Without dead ends: 223 [2023-04-01 12:37:01,432 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 12:37:01,435 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:01,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:37:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-01 12:37:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-01 12:37:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.423963133640553) internal successors, (309), 217 states have internal predecessors, (309), 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 12:37:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2023-04-01 12:37:01,506 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 38 [2023-04-01 12:37:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:01,507 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2023-04-01 12:37:01,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 12:37:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2023-04-01 12:37:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 12:37:01,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:01,513 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] [2023-04-01 12:37:01,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:37:01,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:01,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1292569901, now seen corresponding path program 1 times [2023-04-01 12:37:01,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:01,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106131008] [2023-04-01 12:37:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:01,704 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 12:37:01,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:01,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106131008] [2023-04-01 12:37:01,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106131008] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:01,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:01,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:37:01,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465074688] [2023-04-01 12:37:01,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:37:01,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:37:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:37:01,708 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 12:37:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:01,891 INFO L93 Difference]: Finished difference Result 707 states and 1011 transitions. [2023-04-01 12:37:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:37:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 41 [2023-04-01 12:37:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:01,895 INFO L225 Difference]: With dead ends: 707 [2023-04-01 12:37:01,896 INFO L226 Difference]: Without dead ends: 509 [2023-04-01 12:37:01,900 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 12:37:01,909 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:01,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 274 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:37:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-04-01 12:37:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2023-04-01 12:37:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.4231536926147705) internal successors, (713), 501 states have internal predecessors, (713), 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 12:37:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2023-04-01 12:37:02,027 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 41 [2023-04-01 12:37:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:02,029 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2023-04-01 12:37:02,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 12:37:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2023-04-01 12:37:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:37:02,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:02,033 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] [2023-04-01 12:37:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:37:02,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:02,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash -822925084, now seen corresponding path program 1 times [2023-04-01 12:37:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450881610] [2023-04-01 12:37:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:02,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:02,157 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 12:37:02,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450881610] [2023-04-01 12:37:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450881610] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:02,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:02,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:37:02,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264752560] [2023-04-01 12:37:02,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:37:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:37:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:37:02,160 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 12:37:02,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:02,468 INFO L93 Difference]: Finished difference Result 1287 states and 1850 transitions. [2023-04-01 12:37:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:37:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 43 [2023-04-01 12:37:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:02,478 INFO L225 Difference]: With dead ends: 1287 [2023-04-01 12:37:02,478 INFO L226 Difference]: Without dead ends: 805 [2023-04-01 12:37:02,479 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 12:37:02,479 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 336 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:02,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 89 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:37:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-04-01 12:37:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 803. [2023-04-01 12:37:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4180225281602004) internal successors, (1133), 799 states have internal predecessors, (1133), 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 12:37:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1136 transitions. [2023-04-01 12:37:02,658 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1136 transitions. Word has length 43 [2023-04-01 12:37:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:02,659 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1136 transitions. [2023-04-01 12:37:02,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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 12:37:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1136 transitions. [2023-04-01 12:37:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:37:02,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:02,661 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] [2023-04-01 12:37:02,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:37:02,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:02,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1446775841, now seen corresponding path program 1 times [2023-04-01 12:37:02,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:02,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647938530] [2023-04-01 12:37:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:03,114 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 12:37:03,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647938530] [2023-04-01 12:37:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647938530] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:37:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:37:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 12:37:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755986123] [2023-04-01 12:37:03,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:37:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 12:37:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:37:03,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 12:37:03,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:37:03,116 INFO L87 Difference]: Start difference. First operand 803 states and 1136 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 12:37:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:37:03,560 INFO L93 Difference]: Finished difference Result 1482 states and 2099 transitions. [2023-04-01 12:37:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:37:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 43 [2023-04-01 12:37:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:37:03,567 INFO L225 Difference]: With dead ends: 1482 [2023-04-01 12:37:03,567 INFO L226 Difference]: Without dead ends: 1480 [2023-04-01 12:37:03,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:37:03,570 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 501 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:37:03,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 672 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:37:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-01 12:37:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 940. [2023-04-01 12:37:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.4166666666666667) internal successors, (1326), 936 states have internal predecessors, (1326), 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 12:37:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1329 transitions. [2023-04-01 12:37:03,755 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1329 transitions. Word has length 43 [2023-04-01 12:37:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:37:03,755 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1329 transitions. [2023-04-01 12:37:03,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 12:37:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1329 transitions. [2023-04-01 12:37:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:37:03,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:37:03,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:37:03,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:37:03,757 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:37:03,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:37:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash -437766301, now seen corresponding path program 1 times [2023-04-01 12:37:03,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:37:03,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956759616] [2023-04-01 12:37:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:03,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:37:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:04,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:37:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956759616] [2023-04-01 12:37:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956759616] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:37:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996800235] [2023-04-01 12:37:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:37:04,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:37:04,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:37:04,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:37:04,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:37:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:37:04,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 12:37:04,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:37:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:06,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:37:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:37:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996800235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 12:37:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316854246] [2023-04-01 12:37:10,080 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-01 12:37:10,081 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 12:37:10,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 12:37:10,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 12:37:10,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 12:37:11,249 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 150 for LOIs [2023-04-01 12:37:18,763 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 168