/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.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:38:21,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:38:21,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:38:21,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:38:21,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:38:21,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:38:21,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:38:21,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:38:21,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:38:21,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:38:21,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:38:21,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:38:21,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:38:21,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:38:21,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:38:21,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:38:21,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 12:38:21,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:38:21,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:38:21,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:38:21,902 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 12:38:21,931 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:38:21,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:38:21,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:38:21,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:38:21,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:38:21,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:38:21,933 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:38:21,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:38:21,933 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:38:21,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:38:21,933 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:38:21,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:38:21,934 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:38:21,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:38:21,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:38:21,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:38:21,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:21,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:38:21,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:38:21,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:38:22,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:38:22,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:38:22,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:38:22,136 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:38:22,137 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:38:22,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:38:23,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:38:23,392 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:38:23,392 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:38:23,402 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce2cc3fb3/cb45cfc7f26d4330aa90853b4c59fec7/FLAGe9963da33 [2023-04-01 12:38:23,411 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce2cc3fb3/cb45cfc7f26d4330aa90853b4c59fec7 [2023-04-01 12:38:23,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:38:23,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:38:23,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:23,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:38:23,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:38:23,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdbee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23, skipping insertion in model container [2023-04-01 12:38:23,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:38:23,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:38:23,640 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.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-04-01 12:38:23,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:23,748 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:38:23,820 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.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2023-04-01 12:38:23,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:38:23,881 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:38:23,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23 WrapperNode [2023-04-01 12:38:23,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:38:23,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:38:23,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:38:23,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:38:23,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:38:23,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:38:23,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:38:23,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:38:23,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (1/1) ... [2023-04-01 12:38:23,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:38:23,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:38:23,997 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 12:38:24,003 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 12:38:24,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:38:24,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:38:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:38:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:38:24,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:38:24,031 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:38:24,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:38:24,147 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:38:24,149 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:38:24,888 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:38:25,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:38:25,151 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:38:25,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:25 BoogieIcfgContainer [2023-04-01 12:38:25,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:38:25,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:38:25,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:38:25,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:38:25,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:38:23" (1/3) ... [2023-04-01 12:38:25,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:25, skipping insertion in model container [2023-04-01 12:38:25,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:38:23" (2/3) ... [2023-04-01 12:38:25,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b63f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:38:25, skipping insertion in model container [2023-04-01 12:38:25,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:38:25" (3/3) ... [2023-04-01 12:38:25,161 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2023-04-01 12:38:25,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:38:25,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:38:25,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:38:25,227 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;@715f1ae5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:38:25,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:38:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 330 states, 302 states have (on average 1.5827814569536425) internal successors, (478), 325 states have internal predecessors, (478), 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 12:38:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 12:38:25,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:25,240 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 12:38:25,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:25,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash 966151745, now seen corresponding path program 1 times [2023-04-01 12:38:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:25,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345105306] [2023-04-01 12:38:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:25,644 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 12:38:25,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345105306] [2023-04-01 12:38:25,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345105306] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:25,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:25,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:38:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110254477] [2023-04-01 12:38:25,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:38:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:38:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:38:25,671 INFO L87 Difference]: Start difference. First operand has 330 states, 302 states have (on average 1.5827814569536425) internal successors, (478), 325 states have internal predecessors, (478), 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 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 12:38:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:25,796 INFO L93 Difference]: Finished difference Result 613 states and 915 transitions. [2023-04-01 12:38:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:25,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 12:38:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:25,804 INFO L225 Difference]: With dead ends: 613 [2023-04-01 12:38:25,804 INFO L226 Difference]: Without dead ends: 304 [2023-04-01 12:38:25,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:25,809 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 88 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:25,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1235 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-04-01 12:38:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2023-04-01 12:38:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 300 states have (on average 1.47) internal successors, (441), 300 states have internal predecessors, (441), 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 12:38:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 444 transitions. [2023-04-01 12:38:25,843 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 444 transitions. Word has length 60 [2023-04-01 12:38:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:25,844 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 444 transitions. [2023-04-01 12:38:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 12:38:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 444 transitions. [2023-04-01 12:38:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-01 12:38:25,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:25,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:38:25,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:38:25,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:25,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 487408862, now seen corresponding path program 1 times [2023-04-01 12:38:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:25,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003371011] [2023-04-01 12:38:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:25,973 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 12:38:25,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:25,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003371011] [2023-04-01 12:38:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003371011] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:25,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:25,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744630389] [2023-04-01 12:38:25,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:25,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:25,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:25,976 INFO L87 Difference]: Start difference. First operand 304 states and 444 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 12:38:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,065 INFO L93 Difference]: Finished difference Result 737 states and 1097 transitions. [2023-04-01 12:38:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-01 12:38:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,068 INFO L225 Difference]: With dead ends: 737 [2023-04-01 12:38:26,068 INFO L226 Difference]: Without dead ends: 477 [2023-04-01 12:38:26,069 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 12:38:26,070 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 340 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 717 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-04-01 12:38:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 475. [2023-04-01 12:38:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 471 states have (on average 1.4777070063694266) internal successors, (696), 471 states have internal predecessors, (696), 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 12:38:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 699 transitions. [2023-04-01 12:38:26,098 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 699 transitions. Word has length 83 [2023-04-01 12:38:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:26,098 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 699 transitions. [2023-04-01 12:38:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 12:38:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 699 transitions. [2023-04-01 12:38:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 12:38:26,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:26,101 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, 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 12:38:26,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:38:26,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:26,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1397559375, now seen corresponding path program 1 times [2023-04-01 12:38:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:26,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061226858] [2023-04-01 12:38:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:26,192 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 12:38:26,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061226858] [2023-04-01 12:38:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061226858] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:26,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078017718] [2023-04-01 12:38:26,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:26,196 INFO L87 Difference]: Start difference. First operand 475 states and 699 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 12:38:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,302 INFO L93 Difference]: Finished difference Result 1178 states and 1753 transitions. [2023-04-01 12:38:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 92 [2023-04-01 12:38:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,305 INFO L225 Difference]: With dead ends: 1178 [2023-04-01 12:38:26,305 INFO L226 Difference]: Without dead ends: 760 [2023-04-01 12:38:26,309 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 12:38:26,311 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 334 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 702 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2023-04-01 12:38:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 758. [2023-04-01 12:38:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 754 states have (on average 1.476127320954907) internal successors, (1113), 754 states have internal predecessors, (1113), 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 12:38:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1116 transitions. [2023-04-01 12:38:26,381 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1116 transitions. Word has length 92 [2023-04-01 12:38:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:26,382 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1116 transitions. [2023-04-01 12:38:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 12:38:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1116 transitions. [2023-04-01 12:38:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 12:38:26,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:26,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:26,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:38:26,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:26,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash 997189616, now seen corresponding path program 1 times [2023-04-01 12:38:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:26,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726985404] [2023-04-01 12:38:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:26,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:26,493 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 12:38:26,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:26,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726985404] [2023-04-01 12:38:26,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726985404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:26,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:26,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800174944] [2023-04-01 12:38:26,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:26,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:26,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:26,495 INFO L87 Difference]: Start difference. First operand 758 states and 1116 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 12:38:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:26,643 INFO L93 Difference]: Finished difference Result 1896 states and 2804 transitions. [2023-04-01 12:38:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 101 [2023-04-01 12:38:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:26,649 INFO L225 Difference]: With dead ends: 1896 [2023-04-01 12:38:26,649 INFO L226 Difference]: Without dead ends: 1208 [2023-04-01 12:38:26,650 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 12:38:26,650 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 327 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:26,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 769 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2023-04-01 12:38:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2023-04-01 12:38:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1202 states have (on average 1.464226289517471) internal successors, (1760), 1202 states have internal predecessors, (1760), 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 12:38:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1763 transitions. [2023-04-01 12:38:26,750 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1763 transitions. Word has length 101 [2023-04-01 12:38:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:26,750 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 1763 transitions. [2023-04-01 12:38:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 12:38:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1763 transitions. [2023-04-01 12:38:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 12:38:26,756 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:26,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:38:26,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:26,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -955271691, now seen corresponding path program 1 times [2023-04-01 12:38:26,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:26,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171478776] [2023-04-01 12:38:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:26,864 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 12:38:26,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171478776] [2023-04-01 12:38:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171478776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:26,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:26,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:26,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3382077] [2023-04-01 12:38:26,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:26,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:26,869 INFO L87 Difference]: Start difference. First operand 1206 states and 1763 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 12:38:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:27,119 INFO L93 Difference]: Finished difference Result 2991 states and 4363 transitions. [2023-04-01 12:38:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-01 12:38:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:27,129 INFO L225 Difference]: With dead ends: 2991 [2023-04-01 12:38:27,129 INFO L226 Difference]: Without dead ends: 1868 [2023-04-01 12:38:27,131 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 12:38:27,133 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 321 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:27,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 735 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2023-04-01 12:38:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1866. [2023-04-01 12:38:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1862 states have (on average 1.4387755102040816) internal successors, (2679), 1862 states have internal predecessors, (2679), 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 12:38:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2682 transitions. [2023-04-01 12:38:27,284 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2682 transitions. Word has length 110 [2023-04-01 12:38:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:27,284 INFO L495 AbstractCegarLoop]: Abstraction has 1866 states and 2682 transitions. [2023-04-01 12:38:27,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 12:38:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2682 transitions. [2023-04-01 12:38:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 12:38:27,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:27,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:38:27,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:27,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1202537237, now seen corresponding path program 1 times [2023-04-01 12:38:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158389899] [2023-04-01 12:38:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:27,500 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 12:38:27,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:27,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158389899] [2023-04-01 12:38:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158389899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:27,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:27,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:38:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336431239] [2023-04-01 12:38:27,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:27,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:38:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:38:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:38:27,502 INFO L87 Difference]: Start difference. First operand 1866 states and 2682 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 12:38:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:28,510 INFO L93 Difference]: Finished difference Result 7789 states and 11108 transitions. [2023-04-01 12:38:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:38:28,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 119 [2023-04-01 12:38:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:28,526 INFO L225 Difference]: With dead ends: 7789 [2023-04-01 12:38:28,526 INFO L226 Difference]: Without dead ends: 6000 [2023-04-01 12:38:28,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:38:28,532 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 1582 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:28,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 1862 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:38:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2023-04-01 12:38:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 5994. [2023-04-01 12:38:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 5990 states have (on average 1.4165275459098496) internal successors, (8485), 5990 states have internal predecessors, (8485), 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 12:38:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 8488 transitions. [2023-04-01 12:38:29,207 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 8488 transitions. Word has length 119 [2023-04-01 12:38:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:29,207 INFO L495 AbstractCegarLoop]: Abstraction has 5994 states and 8488 transitions. [2023-04-01 12:38:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 12:38:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 8488 transitions. [2023-04-01 12:38:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:38:29,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:29,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:29,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:38:29,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:29,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 38867522, now seen corresponding path program 1 times [2023-04-01 12:38:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:29,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173885542] [2023-04-01 12:38:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:29,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:29,281 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 12:38:29,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173885542] [2023-04-01 12:38:29,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173885542] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:29,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:29,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92291960] [2023-04-01 12:38:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:29,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:29,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:29,283 INFO L87 Difference]: Start difference. First operand 5994 states and 8488 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 12:38:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:30,423 INFO L93 Difference]: Finished difference Result 14134 states and 19965 transitions. [2023-04-01 12:38:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:30,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 121 [2023-04-01 12:38:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:30,453 INFO L225 Difference]: With dead ends: 14134 [2023-04-01 12:38:30,454 INFO L226 Difference]: Without dead ends: 9908 [2023-04-01 12:38:30,462 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 12:38:30,463 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 324 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:30,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1010 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9908 states. [2023-04-01 12:38:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9908 to 9906. [2023-04-01 12:38:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9902 states have (on average 1.3982023833568975) internal successors, (13845), 9902 states have internal predecessors, (13845), 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 12:38:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 13848 transitions. [2023-04-01 12:38:31,661 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 13848 transitions. Word has length 121 [2023-04-01 12:38:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 9906 states and 13848 transitions. [2023-04-01 12:38:31,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 12:38:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 13848 transitions. [2023-04-01 12:38:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 12:38:31,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:31,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:31,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:38:31,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:31,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash 539372884, now seen corresponding path program 1 times [2023-04-01 12:38:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:31,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665952985] [2023-04-01 12:38:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:31,753 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 12:38:31,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665952985] [2023-04-01 12:38:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665952985] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:31,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023396134] [2023-04-01 12:38:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:31,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:31,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:31,755 INFO L87 Difference]: Start difference. First operand 9906 states and 13848 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 12:38:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:33,182 INFO L93 Difference]: Finished difference Result 20034 states and 27890 transitions. [2023-04-01 12:38:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-01 12:38:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:33,235 INFO L225 Difference]: With dead ends: 20034 [2023-04-01 12:38:33,235 INFO L226 Difference]: Without dead ends: 14828 [2023-04-01 12:38:33,244 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 12:38:33,245 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 284 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:33,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1045 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14828 states. [2023-04-01 12:38:34,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14828 to 14826. [2023-04-01 12:38:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14826 states, 14822 states have (on average 1.378019160707057) internal successors, (20425), 14822 states have internal predecessors, (20425), 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 12:38:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14826 states to 14826 states and 20428 transitions. [2023-04-01 12:38:35,031 INFO L78 Accepts]: Start accepts. Automaton has 14826 states and 20428 transitions. Word has length 123 [2023-04-01 12:38:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:35,031 INFO L495 AbstractCegarLoop]: Abstraction has 14826 states and 20428 transitions. [2023-04-01 12:38:35,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 12:38:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 14826 states and 20428 transitions. [2023-04-01 12:38:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 12:38:35,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:35,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:38:35,065 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:35,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1723799312, now seen corresponding path program 1 times [2023-04-01 12:38:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:35,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958313387] [2023-04-01 12:38:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:35,162 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 12:38:35,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958313387] [2023-04-01 12:38:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958313387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:35,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:35,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:35,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016124441] [2023-04-01 12:38:35,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:35,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:35,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:35,164 INFO L87 Difference]: Start difference. First operand 14826 states and 20428 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 12:38:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:37,136 INFO L93 Difference]: Finished difference Result 24160 states and 33016 transitions. [2023-04-01 12:38:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-01 12:38:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:37,177 INFO L225 Difference]: With dead ends: 24160 [2023-04-01 12:38:37,178 INFO L226 Difference]: Without dead ends: 19406 [2023-04-01 12:38:37,188 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 12:38:37,188 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 250 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:37,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1036 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:38:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2023-04-01 12:38:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 19404. [2023-04-01 12:38:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19404 states, 19400 states have (on average 1.3543814432989691) internal successors, (26275), 19400 states have internal predecessors, (26275), 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 12:38:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 26278 transitions. [2023-04-01 12:38:39,451 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 26278 transitions. Word has length 123 [2023-04-01 12:38:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:39,451 INFO L495 AbstractCegarLoop]: Abstraction has 19404 states and 26278 transitions. [2023-04-01 12:38:39,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 12:38:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 26278 transitions. [2023-04-01 12:38:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:38:39,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:39,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:38:39,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:39,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -138349574, now seen corresponding path program 1 times [2023-04-01 12:38:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:39,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950261740] [2023-04-01 12:38:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:39,606 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 12:38:39,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:39,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950261740] [2023-04-01 12:38:39,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950261740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:39,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:38:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821884043] [2023-04-01 12:38:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:38:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:38:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:38:39,608 INFO L87 Difference]: Start difference. First operand 19404 states and 26278 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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 12:38:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:43,011 INFO L93 Difference]: Finished difference Result 48071 states and 65352 transitions. [2023-04-01 12:38:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:38:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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 125 [2023-04-01 12:38:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:43,067 INFO L225 Difference]: With dead ends: 48071 [2023-04-01 12:38:43,068 INFO L226 Difference]: Without dead ends: 28706 [2023-04-01 12:38:43,094 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 12:38:43,095 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1253 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:43,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 531 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28706 states. [2023-04-01 12:38:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28706 to 28704. [2023-04-01 12:38:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28704 states, 28700 states have (on average 1.3497560975609757) internal successors, (38738), 28700 states have internal predecessors, (38738), 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 12:38:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28704 states to 28704 states and 38741 transitions. [2023-04-01 12:38:46,393 INFO L78 Accepts]: Start accepts. Automaton has 28704 states and 38741 transitions. Word has length 125 [2023-04-01 12:38:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:46,393 INFO L495 AbstractCegarLoop]: Abstraction has 28704 states and 38741 transitions. [2023-04-01 12:38:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 4 states have internal predecessors, (122), 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 12:38:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28704 states and 38741 transitions. [2023-04-01 12:38:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:38:46,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:46,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:46,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:38:46,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:46,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1379819664, now seen corresponding path program 1 times [2023-04-01 12:38:46,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:46,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769951174] [2023-04-01 12:38:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:46,599 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 12:38:46,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:46,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769951174] [2023-04-01 12:38:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769951174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:46,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:46,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783322737] [2023-04-01 12:38:46,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:46,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:46,601 INFO L87 Difference]: Start difference. First operand 28704 states and 38741 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:38:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:48,363 INFO L93 Difference]: Finished difference Result 38944 states and 52631 transitions. [2023-04-01 12:38:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 12:38:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:48,394 INFO L225 Difference]: With dead ends: 38944 [2023-04-01 12:38:48,395 INFO L226 Difference]: Without dead ends: 15044 [2023-04-01 12:38:48,430 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 12:38:48,431 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 171 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:48,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 636 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15044 states. [2023-04-01 12:38:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15044 to 12674. [2023-04-01 12:38:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12674 states, 12670 states have (on average 1.3372533543804261) internal successors, (16943), 12670 states have internal predecessors, (16943), 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 12:38:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12674 states to 12674 states and 16946 transitions. [2023-04-01 12:38:50,089 INFO L78 Accepts]: Start accepts. Automaton has 12674 states and 16946 transitions. Word has length 125 [2023-04-01 12:38:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:50,089 INFO L495 AbstractCegarLoop]: Abstraction has 12674 states and 16946 transitions. [2023-04-01 12:38:50,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:38:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 12674 states and 16946 transitions. [2023-04-01 12:38:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:38:50,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:50,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:38:50,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:50,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash -159242029, now seen corresponding path program 1 times [2023-04-01 12:38:50,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:50,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658944246] [2023-04-01 12:38:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:50,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:50,336 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 12:38:50,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658944246] [2023-04-01 12:38:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658944246] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:50,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:50,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:38:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149643721] [2023-04-01 12:38:50,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:38:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:38:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:38:50,338 INFO L87 Difference]: Start difference. First operand 12674 states and 16946 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:38:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:51,191 INFO L93 Difference]: Finished difference Result 17674 states and 23656 transitions. [2023-04-01 12:38:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:38:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 12:38:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:51,204 INFO L225 Difference]: With dead ends: 17674 [2023-04-01 12:38:51,204 INFO L226 Difference]: Without dead ends: 6454 [2023-04-01 12:38:51,216 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 12:38:51,217 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 121 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:51,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 601 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:38:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2023-04-01 12:38:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6452. [2023-04-01 12:38:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6448 states have (on average 1.3146712158808933) internal successors, (8477), 6448 states have internal predecessors, (8477), 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 12:38:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 8480 transitions. [2023-04-01 12:38:51,997 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 8480 transitions. Word has length 125 [2023-04-01 12:38:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:51,997 INFO L495 AbstractCegarLoop]: Abstraction has 6452 states and 8480 transitions. [2023-04-01 12:38:51,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:38:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 8480 transitions. [2023-04-01 12:38:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:38:52,005 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:52,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:52,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:38:52,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:52,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1218080069, now seen corresponding path program 1 times [2023-04-01 12:38:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:52,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910565208] [2023-04-01 12:38:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:52,241 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 12:38:52,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910565208] [2023-04-01 12:38:52,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910565208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:52,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:52,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:38:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378639766] [2023-04-01 12:38:52,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:52,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:38:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:38:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:38:52,243 INFO L87 Difference]: Start difference. First operand 6452 states and 8480 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 12:38:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:54,169 INFO L93 Difference]: Finished difference Result 18734 states and 24378 transitions. [2023-04-01 12:38:54,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:38:54,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-01 12:38:54,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:54,191 INFO L225 Difference]: With dead ends: 18734 [2023-04-01 12:38:54,191 INFO L226 Difference]: Without dead ends: 12472 [2023-04-01 12:38:54,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:54,202 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 869 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:54,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 533 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:38:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12472 states. [2023-04-01 12:38:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12472 to 10192. [2023-04-01 12:38:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10192 states, 10188 states have (on average 1.2799371809972517) internal successors, (13040), 10188 states have internal predecessors, (13040), 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 12:38:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10192 states to 10192 states and 13043 transitions. [2023-04-01 12:38:55,615 INFO L78 Accepts]: Start accepts. Automaton has 10192 states and 13043 transitions. Word has length 125 [2023-04-01 12:38:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:38:55,615 INFO L495 AbstractCegarLoop]: Abstraction has 10192 states and 13043 transitions. [2023-04-01 12:38:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 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 12:38:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10192 states and 13043 transitions. [2023-04-01 12:38:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:38:55,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:38:55,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:38:55,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:38:55,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:38:55,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:38:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash -252200746, now seen corresponding path program 1 times [2023-04-01 12:38:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:38:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957084352] [2023-04-01 12:38:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:38:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:38:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:38:55,857 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 12:38:55,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:38:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957084352] [2023-04-01 12:38:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957084352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:38:55,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:38:55,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:38:55,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093061326] [2023-04-01 12:38:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:38:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:38:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:38:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:38:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:38:55,859 INFO L87 Difference]: Start difference. First operand 10192 states and 13043 transitions. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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 12:38:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:38:58,750 INFO L93 Difference]: Finished difference Result 25010 states and 31969 transitions. [2023-04-01 12:38:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 12:38:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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 125 [2023-04-01 12:38:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:38:58,772 INFO L225 Difference]: With dead ends: 25010 [2023-04-01 12:38:58,773 INFO L226 Difference]: Without dead ends: 17952 [2023-04-01 12:38:58,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-01 12:38:58,784 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 2227 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:38:58,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2227 Valid, 639 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:38:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17952 states. [2023-04-01 12:39:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17952 to 14412. [2023-04-01 12:39:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14408 states have (on average 1.2779705719044976) internal successors, (18413), 14408 states have internal predecessors, (18413), 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 12:39:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 18416 transitions. [2023-04-01 12:39:00,838 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 18416 transitions. Word has length 125 [2023-04-01 12:39:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:00,838 INFO L495 AbstractCegarLoop]: Abstraction has 14412 states and 18416 transitions. [2023-04-01 12:39:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 6 states have internal predecessors, (122), 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 12:39:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 18416 transitions. [2023-04-01 12:39:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:39:00,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:00,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:39:00,855 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:00,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -986806602, now seen corresponding path program 1 times [2023-04-01 12:39:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:00,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369219230] [2023-04-01 12:39:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:01,632 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 12:39:01,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:01,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369219230] [2023-04-01 12:39:01,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369219230] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:01,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:01,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 12:39:01,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430549178] [2023-04-01 12:39:01,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:01,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 12:39:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 12:39:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:39:01,634 INFO L87 Difference]: Start difference. First operand 14412 states and 18416 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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 12:39:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:04,872 INFO L93 Difference]: Finished difference Result 20142 states and 25836 transitions. [2023-04-01 12:39:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:39:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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 125 [2023-04-01 12:39:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:04,899 INFO L225 Difference]: With dead ends: 20142 [2023-04-01 12:39:04,899 INFO L226 Difference]: Without dead ends: 20140 [2023-04-01 12:39:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:39:04,907 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 627 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:04,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 2183 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20140 states. [2023-04-01 12:39:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20140 to 18088. [2023-04-01 12:39:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18088 states, 18084 states have (on average 1.2825149303251493) internal successors, (23193), 18084 states have internal predecessors, (23193), 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 12:39:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18088 states to 18088 states and 23196 transitions. [2023-04-01 12:39:07,825 INFO L78 Accepts]: Start accepts. Automaton has 18088 states and 23196 transitions. Word has length 125 [2023-04-01 12:39:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:07,825 INFO L495 AbstractCegarLoop]: Abstraction has 18088 states and 23196 transitions. [2023-04-01 12:39:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 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 12:39:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18088 states and 23196 transitions. [2023-04-01 12:39:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:39:07,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:07,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:07,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:39:07,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:07,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 616650535, now seen corresponding path program 1 times [2023-04-01 12:39:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:07,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055625197] [2023-04-01 12:39:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:07,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:07,923 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 12:39:07,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:07,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055625197] [2023-04-01 12:39:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055625197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:07,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:39:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204986725] [2023-04-01 12:39:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:39:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:39:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:39:07,925 INFO L87 Difference]: Start difference. First operand 18088 states and 23196 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:39:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:09,264 INFO L93 Difference]: Finished difference Result 23497 states and 30160 transitions. [2023-04-01 12:39:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:39:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 12:39:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:09,274 INFO L225 Difference]: With dead ends: 23497 [2023-04-01 12:39:09,274 INFO L226 Difference]: Without dead ends: 7468 [2023-04-01 12:39:09,291 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 12:39:09,291 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 75 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:09,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 573 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:39:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2023-04-01 12:39:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 7466. [2023-04-01 12:39:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 7462 states have (on average 1.2668185473063522) internal successors, (9453), 7462 states have internal predecessors, (9453), 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 12:39:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 9456 transitions. [2023-04-01 12:39:10,571 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 9456 transitions. Word has length 125 [2023-04-01 12:39:10,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 7466 states and 9456 transitions. [2023-04-01 12:39:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:39:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 9456 transitions. [2023-04-01 12:39:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 12:39:10,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:10,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:10,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:39:10,577 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:10,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1184099958, now seen corresponding path program 1 times [2023-04-01 12:39:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:10,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365065381] [2023-04-01 12:39:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:10,662 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 12:39:10,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:10,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365065381] [2023-04-01 12:39:10,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365065381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:10,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:10,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:39:10,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341687889] [2023-04-01 12:39:10,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:39:10,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:39:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:39:10,664 INFO L87 Difference]: Start difference. First operand 7466 states and 9456 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:39:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:11,383 INFO L93 Difference]: Finished difference Result 10545 states and 13366 transitions. [2023-04-01 12:39:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:39:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 125 [2023-04-01 12:39:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:11,390 INFO L225 Difference]: With dead ends: 10545 [2023-04-01 12:39:11,390 INFO L226 Difference]: Without dead ends: 4095 [2023-04-01 12:39:11,398 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 12:39:11,398 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 63 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:11,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 472 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:39:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2023-04-01 12:39:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 4093. [2023-04-01 12:39:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4089 states have (on average 1.2408901932012717) internal successors, (5074), 4089 states have internal predecessors, (5074), 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 12:39:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 5077 transitions. [2023-04-01 12:39:12,120 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 5077 transitions. Word has length 125 [2023-04-01 12:39:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:12,120 INFO L495 AbstractCegarLoop]: Abstraction has 4093 states and 5077 transitions. [2023-04-01 12:39:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 12:39:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 5077 transitions. [2023-04-01 12:39:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 12:39:12,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:12,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:39:12,124 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:12,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 104808352, now seen corresponding path program 1 times [2023-04-01 12:39:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:12,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483184304] [2023-04-01 12:39:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:39:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483184304] [2023-04-01 12:39:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483184304] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:13,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:13,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:39:13,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266603657] [2023-04-01 12:39:13,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:13,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:39:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:13,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:39:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:39:13,226 INFO L87 Difference]: Start difference. First operand 4093 states and 5077 transitions. Second operand has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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 12:39:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:18,481 INFO L93 Difference]: Finished difference Result 9375 states and 11598 transitions. [2023-04-01 12:39:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 12:39:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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 136 [2023-04-01 12:39:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:18,492 INFO L225 Difference]: With dead ends: 9375 [2023-04-01 12:39:18,493 INFO L226 Difference]: Without dead ends: 7730 [2023-04-01 12:39:18,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=731, Invalid=1719, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 12:39:18,511 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 3349 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3349 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:18,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3349 Valid, 1847 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:39:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7730 states. [2023-04-01 12:39:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7730 to 4872. [2023-04-01 12:39:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4868 states have (on average 1.2366474938373049) internal successors, (6020), 4868 states have internal predecessors, (6020), 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 12:39:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 6023 transitions. [2023-04-01 12:39:19,697 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 6023 transitions. Word has length 136 [2023-04-01 12:39:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:19,697 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 6023 transitions. [2023-04-01 12:39:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.125) internal successors, (130), 15 states have internal predecessors, (130), 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 12:39:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 6023 transitions. [2023-04-01 12:39:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 12:39:19,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:19,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:39:19,704 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:19,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -912958455, now seen corresponding path program 1 times [2023-04-01 12:39:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883027855] [2023-04-01 12:39:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 12:39:19,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:19,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883027855] [2023-04-01 12:39:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883027855] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:19,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:19,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:39:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137010212] [2023-04-01 12:39:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:19,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:39:19,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:39:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:39:19,821 INFO L87 Difference]: Start difference. First operand 4872 states and 6023 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 12:39:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:39:21,438 INFO L93 Difference]: Finished difference Result 10784 states and 13327 transitions. [2023-04-01 12:39:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:39:21,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 136 [2023-04-01 12:39:21,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:39:21,446 INFO L225 Difference]: With dead ends: 10784 [2023-04-01 12:39:21,447 INFO L226 Difference]: Without dead ends: 5973 [2023-04-01 12:39:21,452 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 12:39:21,452 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 836 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:39:21,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 257 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:39:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2023-04-01 12:39:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 4872. [2023-04-01 12:39:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4868 states have (on average 1.2358258011503698) internal successors, (6016), 4868 states have internal predecessors, (6016), 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 12:39:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 6019 transitions. [2023-04-01 12:39:22,668 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 6019 transitions. Word has length 136 [2023-04-01 12:39:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:39:22,668 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 6019 transitions. [2023-04-01 12:39:22,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 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 12:39:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 6019 transitions. [2023-04-01 12:39:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 12:39:22,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:39:22,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:39:22,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:39:22,673 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:39:22,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:39:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1496938756, now seen corresponding path program 1 times [2023-04-01 12:39:22,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:39:22,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73696385] [2023-04-01 12:39:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:39:22,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:39:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:39:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 12:39:22,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:39:22,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73696385] [2023-04-01 12:39:22,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73696385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:39:22,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:39:22,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:39:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996591093] [2023-04-01 12:39:22,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:39:22,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:39:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:39:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:39:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:39:22,992 INFO L87 Difference]: Start difference. First operand 4872 states and 6019 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 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)