/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 OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:39:16,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:39:16,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:39:17,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:39:17,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:39:17,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:39:17,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:39:17,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:39:17,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:39:17,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:39:17,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:39:17,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:39:17,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:39:17,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:39:17,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:39:17,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:39:17,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:39:17,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:39:17,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:39:17,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:39:17,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:39:17,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:39:17,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:39:17,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:39:17,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:39:17,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:39:17,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:39:17,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:39:17,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:39:17,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:39:17,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:39:17,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:39:17,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:39:17,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:39:17,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:39:17,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:39:17,071 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 [2023-04-02 22:39:17,098 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:39:17,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:39:17,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:39:17,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:39:17,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:39:17,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:39:17,100 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:39:17,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:39:17,100 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:39:17,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:39:17,101 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:39:17,101 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:39:17,101 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:39:17,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:39:17,102 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:39:17,102 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:39:17,102 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:39:17,102 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:39:17,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:39:17,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:39:17,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:39:17,104 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:39:17,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:39:17,104 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:39:17,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:39:17,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:39:17,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:39:17,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:39:17,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:39:17,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:39:17,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:39:17,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:39:17,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:39:17,341 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:39:17,342 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:39:17,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2023-04-02 22:39:18,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:39:18,641 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:39:18,642 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2023-04-02 22:39:18,646 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a7a2984/41e4d610055a4b95a21f0be677555744/FLAG25fb57839 [2023-04-02 22:39:18,660 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a7a2984/41e4d610055a4b95a21f0be677555744 [2023-04-02 22:39:18,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:39:18,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:39:18,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:39:18,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:39:18,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:39:18,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43653b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18, skipping insertion in model container [2023-04-02 22:39:18,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:39:18,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:39:18,846 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/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2023-04-02 22:39:18,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:39:18,895 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:39:18,907 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/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2023-04-02 22:39:18,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:39:18,950 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:39:18,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18 WrapperNode [2023-04-02 22:39:18,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:39:18,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:39:18,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:39:18,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:39:18,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:18,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:39:18,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:39:18,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:39:18,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:39:18,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (1/1) ... [2023-04-02 22:39:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:39:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:19,026 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) [2023-04-02 22:39:19,052 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 [2023-04-02 22:39:19,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:39:19,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:39:19,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:39:19,071 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:39:19,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:39:19,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:39:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:39:19,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:39:19,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:39:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:39:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:39:19,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:39:19,134 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:39:19,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:39:19,390 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:39:19,431 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:39:19,431 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:39:19,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:39:19 BoogieIcfgContainer [2023-04-02 22:39:19,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:39:19,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:39:19,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:39:19,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:39:19,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:39:18" (1/3) ... [2023-04-02 22:39:19,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5fd875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:39:19, skipping insertion in model container [2023-04-02 22:39:19,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:39:18" (2/3) ... [2023-04-02 22:39:19,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5fd875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:39:19, skipping insertion in model container [2023-04-02 22:39:19,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:39:19" (3/3) ... [2023-04-02 22:39:19,441 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2023-04-02 22:39:19,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:39:19,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:39:19,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:39:19,501 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;@5c84a8eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:39:19,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:39:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 22:39:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:39:19,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:19,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:19,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:19,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1529025729, now seen corresponding path program 1 times [2023-04-02 22:39:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249967727] [2023-04-02 22:39:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:19,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:19,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249967727] [2023-04-02 22:39:19,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:39:19,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311356174] [2023-04-02 22:39:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:19,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:19,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:39:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:19,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:39:19,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:19,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:39:19,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311356174] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:19,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:39:19,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:39:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713189856] [2023-04-02 22:39:19,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:39:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:39:19,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:39:19,752 INFO L87 Difference]: Start difference. First operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:39:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:19,781 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-04-02 22:39:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:39:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 22:39:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:19,789 INFO L225 Difference]: With dead ends: 56 [2023-04-02 22:39:19,789 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:39:19,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:39:19,794 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:19,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:39:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:39:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:39:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 22:39:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-04-02 22:39:19,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 15 [2023-04-02 22:39:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:19,825 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-04-02 22:39:19,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:39:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-04-02 22:39:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 22:39:19,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:19,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:19,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:39:20,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 22:39:20,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:20,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1095400856, now seen corresponding path program 1 times [2023-04-02 22:39:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:20,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325227289] [2023-04-02 22:39:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:20,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:20,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970792368] [2023-04-02 22:39:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:20,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:20,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:20,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:20,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:39:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:20,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:39:20,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:20,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:39:20,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325227289] [2023-04-02 22:39:20,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:39:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970792368] [2023-04-02 22:39:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970792368] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:20,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:39:20,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:39:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909628434] [2023-04-02 22:39:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:39:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:39:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:39:20,191 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:20,217 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2023-04-02 22:39:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:39:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-02 22:39:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:20,219 INFO L225 Difference]: With dead ends: 50 [2023-04-02 22:39:20,219 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 22:39:20,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:39:20,220 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:20,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:39:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 22:39:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 22:39:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 22:39:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-02 22:39:20,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2023-04-02 22:39:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:20,229 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-02 22:39:20,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-02 22:39:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:39:20,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:20,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:20,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 22:39:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 22:39:20,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:20,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash 56656903, now seen corresponding path program 1 times [2023-04-02 22:39:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785614038] [2023-04-02 22:39:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:20,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:20,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122887741] [2023-04-02 22:39:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:20,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:20,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:20,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:20,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:39:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:20,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:39:20,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:20,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:39:20,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:20,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785614038] [2023-04-02 22:39:20,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:39:20,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122887741] [2023-04-02 22:39:20,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122887741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:20,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:39:20,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:39:20,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808147383] [2023-04-02 22:39:20,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:39:20,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:39:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:39:20,615 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:20,644 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-04-02 22:39:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:39:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-02 22:39:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:20,646 INFO L225 Difference]: With dead ends: 45 [2023-04-02 22:39:20,646 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 22:39:20,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:39:20,647 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:20,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:39:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 22:39:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-04-02 22:39:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 22:39:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-04-02 22:39:20,656 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 18 [2023-04-02 22:39:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:20,656 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-04-02 22:39:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-04-02 22:39:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:39:20,657 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:20,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:20,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:39:20,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:20,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:20,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 58146453, now seen corresponding path program 1 times [2023-04-02 22:39:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760746922] [2023-04-02 22:39:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:21,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760746922] [2023-04-02 22:39:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760746922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:39:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 22:39:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443275078] [2023-04-02 22:39:21,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:39:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:39:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:39:21,414 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:39:23,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:39:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:23,679 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-04-02 22:39:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:39:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 22:39:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:23,682 INFO L225 Difference]: With dead ends: 67 [2023-04-02 22:39:23,682 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 22:39:23,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-02 22:39:23,683 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:23,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 22:39:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 22:39:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 22:39:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:39:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-04-02 22:39:23,700 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 18 [2023-04-02 22:39:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:23,704 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-04-02 22:39:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 22:39:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-04-02 22:39:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 22:39:23,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:23,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 22:39:23,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:23,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 45867820, now seen corresponding path program 1 times [2023-04-02 22:39:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735607705] [2023-04-02 22:39:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:23,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:23,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092454108] [2023-04-02 22:39:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:23,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:23,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:23,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:39:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:23,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:39:23,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:23,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:39:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:23,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:23,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735607705] [2023-04-02 22:39:23,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:39:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092454108] [2023-04-02 22:39:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092454108] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:39:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909436422] [2023-04-02 22:39:23,926 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 22:39:23,926 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:39:23,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:39:23,932 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:39:23,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:39:23,997 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:39:24,199 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-02 22:39:24,203 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 25 for LOIs [2023-04-02 22:39:24,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:39:24,217 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:39:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1909436422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:24,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:39:24,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5, 5] total 22 [2023-04-02 22:39:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491448635] [2023-04-02 22:39:24,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:24,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:39:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:39:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-04-02 22:39:24,785 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:27,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:39:29,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:39:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:31,247 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-04-02 22:39:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:39:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-02 22:39:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:31,249 INFO L225 Difference]: With dead ends: 75 [2023-04-02 22:39:31,249 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 22:39:31,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:39:31,251 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:31,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 76 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-04-02 22:39:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 22:39:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-02 22:39:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:39:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-04-02 22:39:31,266 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 20 [2023-04-02 22:39:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:31,267 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-04-02 22:39:31,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-04-02 22:39:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:39:31,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:31,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:31,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 22:39:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:31,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:31,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1076247491, now seen corresponding path program 1 times [2023-04-02 22:39:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616192677] [2023-04-02 22:39:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:31,489 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903390750] [2023-04-02 22:39:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:31,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:31,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:31,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:31,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:39:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:31,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:39:31,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:31,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:39:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:31,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616192677] [2023-04-02 22:39:31,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:39:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903390750] [2023-04-02 22:39:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903390750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:39:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032319712] [2023-04-02 22:39:31,656 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 22:39:31,657 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:39:31,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:39:31,657 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:39:31,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:39:31,686 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:39:31,839 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-02 22:39:31,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 25 for LOIs [2023-04-02 22:39:31,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:39:31,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:39:32,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1032319712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:39:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [6, 6] total 24 [2023-04-02 22:39:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309799464] [2023-04-02 22:39:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:39:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:39:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-04-02 22:39:32,433 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:34,033 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2023-04-02 22:39:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 22:39:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-02 22:39:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:34,038 INFO L225 Difference]: With dead ends: 68 [2023-04-02 22:39:34,038 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 22:39:34,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2023-04-02 22:39:34,039 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 22:39:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 22:39:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-04-02 22:39:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:39:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-04-02 22:39:34,052 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 21 [2023-04-02 22:39:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:34,052 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-04-02 22:39:34,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-04-02 22:39:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:39:34,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:34,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:34,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:39:34,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:34,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:34,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1077737041, now seen corresponding path program 1 times [2023-04-02 22:39:34,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:34,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504667114] [2023-04-02 22:39:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:34,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504667114] [2023-04-02 22:39:34,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504667114] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:39:34,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148805138] [2023-04-02 22:39:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:34,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:34,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:39:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:34,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:39:34,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:34,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:39:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:39:34,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148805138] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:39:34,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227999453] [2023-04-02 22:39:34,759 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 22:39:34,759 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:39:34,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:39:34,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:39:34,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:39:34,786 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:39:34,890 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 22:39:34,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 25 for LOIs [2023-04-02 22:39:34,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:39:34,905 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:39:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [227999453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:39:35,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:39:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 7, 7] total 28 [2023-04-02 22:39:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967414421] [2023-04-02 22:39:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:39:35,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 22:39:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 22:39:35,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-04-02 22:39:35,576 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:39,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:39:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:40,782 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2023-04-02 22:39:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:39:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-02 22:39:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:40,783 INFO L225 Difference]: With dead ends: 65 [2023-04-02 22:39:40,783 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 22:39:40,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 22:39:40,785 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:40,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 381 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-04-02 22:39:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 22:39:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-02 22:39:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 22:39:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2023-04-02 22:39:40,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 21 [2023-04-02 22:39:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:40,799 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2023-04-02 22:39:40,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:39:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2023-04-02 22:39:40,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 22:39:40,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:40,806 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:39:40,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:39:41,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:41,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:41,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2008937068, now seen corresponding path program 1 times [2023-04-02 22:39:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:41,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806063528] [2023-04-02 22:39:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:41,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:41,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:41,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632743226] [2023-04-02 22:39:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:41,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 22:39:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:41,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-02 22:39:41,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 22:39:41,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:39:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 22:39:41,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:39:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806063528] [2023-04-02 22:39:41,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:39:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632743226] [2023-04-02 22:39:41,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632743226] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:39:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109674343] [2023-04-02 22:39:41,286 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-02 22:39:41,286 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:39:41,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:39:41,287 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:39:41,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:39:41,308 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:39:42,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 22:39:42,336 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 25 for LOIs [2023-04-02 22:39:42,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:39:42,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:39:43,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2143#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 51) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:39:43,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:39:43,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:39:43,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 22:39:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021710742] [2023-04-02 22:39:43,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:39:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 22:39:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:39:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 22:39:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-04-02 22:39:43,072 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 22:39:45,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:39:47,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:39:49,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:39:51,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:39:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:39:57,225 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2023-04-02 22:39:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 22:39:57,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2023-04-02 22:39:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:39:57,228 INFO L225 Difference]: With dead ends: 215 [2023-04-02 22:39:57,228 INFO L226 Difference]: Without dead ends: 206 [2023-04-02 22:39:57,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 22:39:57,230 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 139 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 75 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:39:57,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 200 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 148 Invalid, 4 Unknown, 0 Unchecked, 14.1s Time] [2023-04-02 22:39:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-02 22:39:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 192. [2023-04-02 22:39:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 99 states have internal predecessors, (111), 84 states have call successors, (84), 14 states have call predecessors, (84), 13 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-04-02 22:39:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 273 transitions. [2023-04-02 22:39:57,262 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 273 transitions. Word has length 54 [2023-04-02 22:39:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:39:57,263 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 273 transitions. [2023-04-02 22:39:57,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 22:39:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 273 transitions. [2023-04-02 22:39:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 22:39:57,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:39:57,265 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-04-02 22:39:57,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 22:39:57,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:57,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:39:57,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:39:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2007447518, now seen corresponding path program 1 times [2023-04-02 22:39:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:39:57,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577825698] [2023-04-02 22:39:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:39:57,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:39:57,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700830305] [2023-04-02 22:39:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:39:57,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:39:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:39:57,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:39:57,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 22:39:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:39:57,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 22:39:57,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:39:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 22:39:57,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:40:05,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:40:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577825698] [2023-04-02 22:40:05,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:40:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700830305] [2023-04-02 22:40:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700830305] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:40:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937339391] [2023-04-02 22:40:05,373 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 22:40:05,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:40:05,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:40:05,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:40:05,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:40:05,392 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 22:40:06,121 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-04-02 22:40:06,131 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 25 for LOIs [2023-04-02 22:40:06,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 22:40:06,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:40:07,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3031#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (<= ~counter~0 50) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 22:40:07,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:40:07,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:40:07,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 22:40:07,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976563463] [2023-04-02 22:40:07,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 22:40:07,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 22:40:07,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:40:07,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 22:40:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=833, Unknown=2, NotChecked=0, Total=930 [2023-04-02 22:40:07,038 INFO L87 Difference]: Start difference. First operand 192 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 22:40:11,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:13,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:17,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:40:19,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:40:24,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:25,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:28,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:29,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 22:40:31,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:40:33,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:40:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:40:33,887 INFO L93 Difference]: Finished difference Result 268 states and 384 transitions. [2023-04-02 22:40:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 22:40:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2023-04-02 22:40:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:40:33,890 INFO L225 Difference]: With dead ends: 268 [2023-04-02 22:40:33,890 INFO L226 Difference]: Without dead ends: 200 [2023-04-02 22:40:33,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=110, Invalid=944, Unknown=2, NotChecked=0, Total=1056 [2023-04-02 22:40:33,892 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 13 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:40:33,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 320 Invalid, 8 Unknown, 0 Unchecked, 26.8s Time] [2023-04-02 22:40:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-02 22:40:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-04-02 22:40:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 100 states have (on average 1.16) internal successors, (116), 105 states have internal predecessors, (116), 84 states have call successors, (84), 16 states have call predecessors, (84), 15 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-04-02 22:40:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 278 transitions. [2023-04-02 22:40:33,925 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 278 transitions. Word has length 54 [2023-04-02 22:40:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:40:33,926 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 278 transitions. [2023-04-02 22:40:33,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 22:40:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 278 transitions. [2023-04-02 22:40:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 22:40:33,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:40:33,927 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:40:33,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 22:40:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 22:40:34,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:40:34,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:40:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -301051426, now seen corresponding path program 2 times [2023-04-02 22:40:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:40:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599849215] [2023-04-02 22:40:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:40:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:40:34,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:40:34,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041221827] [2023-04-02 22:40:34,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:40:34,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:40:34,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:40:34,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:40:34,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 22:40:34,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 22:40:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:40:34,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 22:40:34,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:40:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-02 22:40:34,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:43:08,563 WARN L223 SmtUtils]: Spent 29.22s on a formula simplification. DAG size of input: 256 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)