/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/array-programs/partial_mod_count_limited_base.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:45:42,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:45:42,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:45:42,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:45:42,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:45:42,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:45:42,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:45:42,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:45:42,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:45:42,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:45:42,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:45:42,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:45:42,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:45:42,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:45:42,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:45:42,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:45:42,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:45:42,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:45:42,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:45:42,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:45:42,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:45:42,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:45:42,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:45:42,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:45:42,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:45:42,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:45:42,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:45:42,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:45:42,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:45:42,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:45:42,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:45:42,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:45:42,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:45:42,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:45:42,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:45:42,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:45:42,361 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 14:45:42,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:45:42,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:45:42,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:45:42,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:45:42,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:45:42,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:45:42,390 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:45:42,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:45:42,390 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:45:42,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:45:42,391 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:45:42,391 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:45:42,392 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:45:42,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:45:42,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:45:42,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:45:42,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:45:42,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:45:42,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:45:42,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:45:42,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:45:42,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:45:42,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:45:42,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:45:42,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:45:42,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:45:42,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:45:42,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:45:42,650 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:45:42,657 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:45:42,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-04-02 14:45:43,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:45:43,982 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:45:43,983 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2023-04-02 14:45:43,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e42b898/98f1ac460a984d78a16bcafb9e337f87/FLAGe7dde1780 [2023-04-02 14:45:44,001 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e42b898/98f1ac460a984d78a16bcafb9e337f87 [2023-04-02 14:45:44,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:45:44,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:45:44,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:45:44,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:45:44,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:45:44,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb9d271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44, skipping insertion in model container [2023-04-02 14:45:44,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:45:44,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:45:44,160 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/array-programs/partial_mod_count_limited_base.c[334,347] [2023-04-02 14:45:44,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:45:44,191 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:45:44,202 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2023-04-02 14:45:44,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:45:44,224 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:45:44,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44 WrapperNode [2023-04-02 14:45:44,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:45:44,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:45:44,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:45:44,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:45:44,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,246 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:45:44,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:45:44,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:45:44,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:45:44,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (1/1) ... [2023-04-02 14:45:44,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:45:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:44,279 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 14:45:44,281 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 14:45:44,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:45:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:45:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:45:44,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:45:44,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 14:45:44,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:45:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:45:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:45:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:45:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:45:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:45:44,375 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:45:44,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:45:44,506 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:45:44,568 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:45:44,568 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:45:44,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:45:44 BoogieIcfgContainer [2023-04-02 14:45:44,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:45:44,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:45:44,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:45:44,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:45:44,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:45:44" (1/3) ... [2023-04-02 14:45:44,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774134cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:45:44, skipping insertion in model container [2023-04-02 14:45:44,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:45:44" (2/3) ... [2023-04-02 14:45:44,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774134cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:45:44, skipping insertion in model container [2023-04-02 14:45:44,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:45:44" (3/3) ... [2023-04-02 14:45:44,578 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2023-04-02 14:45:44,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:45:44,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:45:44,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:45:44,642 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;@3ad981ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:45:44,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:45:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:45:44,654 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:44,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:44,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:44,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 873027859, now seen corresponding path program 1 times [2023-04-02 14:45:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:44,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299667371] [2023-04-02 14:45:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:44,965 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 14:45:44,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:44,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299667371] [2023-04-02 14:45:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299667371] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:45:44,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:45:44,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:45:44,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759669084] [2023-04-02 14:45:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:45:44,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:45:44,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:45:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:45:45,006 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:45:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:45,126 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-02 14:45:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:45:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 14:45:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:45,135 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:45:45,135 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:45:45,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:45:45,140 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:45,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:45:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:45:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-04-02 14:45:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:45:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-02 14:45:45,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-04-02 14:45:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:45,173 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-02 14:45:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:45:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-02 14:45:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:45:45,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:45,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:45,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:45:45,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:45,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash -460511409, now seen corresponding path program 1 times [2023-04-02 14:45:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156115524] [2023-04-02 14:45:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:45,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:45,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101737760] [2023-04-02 14:45:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:45,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:45,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:45,205 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 14:45:45,206 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 14:45:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:45,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:45:45,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:45:45,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:45:45,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156115524] [2023-04-02 14:45:45,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:45,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101737760] [2023-04-02 14:45:45,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101737760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:45,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144179221] [2023-04-02 14:45:45,435 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:45:45,436 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:45,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:45,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:45,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:45,566 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:46,033 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-02 14:45:46,058 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2023-04-02 14:45:46,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:46,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:46,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [144179221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:45:46,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-02 14:45:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323695680] [2023-04-02 14:45:46,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:45:46,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 14:45:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 14:45:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-04-02 14:45:46,762 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 14:45:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:48,600 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-02 14:45:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 14:45:48,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 16 [2023-04-02 14:45:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:48,602 INFO L225 Difference]: With dead ends: 31 [2023-04-02 14:45:48,602 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 14:45:48,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:45:48,604 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:48,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:45:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 14:45:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-04-02 14:45:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-02 14:45:48,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2023-04-02 14:45:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:48,616 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-02 14:45:48,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 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 14:45:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-02 14:45:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 14:45:48,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:48,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:48,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:45:48,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:48,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:48,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2022624571, now seen corresponding path program 1 times [2023-04-02 14:45:48,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:48,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838288163] [2023-04-02 14:45:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:48,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771279625] [2023-04-02 14:45:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:48,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:48,839 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 14:45:48,842 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 14:45:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:48,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:45:48,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:45:48,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:45:48,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838288163] [2023-04-02 14:45:48,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771279625] [2023-04-02 14:45:48,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771279625] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312127033] [2023-04-02 14:45:48,953 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:48,953 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:48,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:48,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:48,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:48,992 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:49,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:45:49,484 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2023-04-02 14:45:49,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:49,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:50,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '486#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:50,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:50,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:50,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:45:50,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046208475] [2023-04-02 14:45:50,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:50,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:45:50,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:45:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:45:50,293 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:50,382 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-04-02 14:45:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:45:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-04-02 14:45:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:50,385 INFO L225 Difference]: With dead ends: 52 [2023-04-02 14:45:50,385 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 14:45:50,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:45:50,386 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:50,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 25 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:45:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 14:45:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-04-02 14:45:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-04-02 14:45:50,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-04-02 14:45:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:50,400 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-04-02 14:45:50,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-04-02 14:45:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:45:50,401 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:50,401 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:50,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:50,607 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,SelfDestructingSolverStorable2 [2023-04-02 14:45:50,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:50,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2040507777, now seen corresponding path program 2 times [2023-04-02 14:45:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531887045] [2023-04-02 14:45:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:50,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:50,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837522238] [2023-04-02 14:45:50,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:45:50,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:50,648 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 14:45:50,649 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 14:45:50,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:45:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:50,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:45:50,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:45:50,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:45:50,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531887045] [2023-04-02 14:45:50,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837522238] [2023-04-02 14:45:50,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837522238] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960771867] [2023-04-02 14:45:50,909 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:50,909 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:50,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:50,910 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:50,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:50,929 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:51,295 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:45:51,301 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2023-04-02 14:45:51,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:51,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:52,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '799#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:52,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:52,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:52,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:45:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379014569] [2023-04-02 14:45:52,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:52,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:45:52,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:45:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2023-04-02 14:45:52,086 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:52,287 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2023-04-02 14:45:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:45:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2023-04-02 14:45:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:52,289 INFO L225 Difference]: With dead ends: 76 [2023-04-02 14:45:52,289 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 14:45:52,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:45:52,290 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:52,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:45:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 14:45:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2023-04-02 14:45:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-04-02 14:45:52,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2023-04-02 14:45:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:52,305 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-04-02 14:45:52,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-04-02 14:45:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:45:52,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:52,306 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:52,315 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 14:45:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:52,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:52,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 293267201, now seen corresponding path program 3 times [2023-04-02 14:45:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68827873] [2023-04-02 14:45:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:52,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229351787] [2023-04-02 14:45:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:45:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:52,564 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 14:45:52,566 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 14:45:52,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:45:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:52,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:45:52,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:45:52,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:45:52,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68827873] [2023-04-02 14:45:52,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229351787] [2023-04-02 14:45:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229351787] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168383048] [2023-04-02 14:45:52,965 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:52,966 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:52,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:52,966 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:52,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:52,982 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:53,309 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:45:53,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2023-04-02 14:45:53,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:53,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:54,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1220#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:54,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:54,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 14:45:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513813925] [2023-04-02 14:45:54,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:54,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 14:45:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 14:45:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 14:45:54,110 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:54,589 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2023-04-02 14:45:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 14:45:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-04-02 14:45:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:54,594 INFO L225 Difference]: With dead ends: 124 [2023-04-02 14:45:54,594 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 14:45:54,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=678, Invalid=2078, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 14:45:54,597 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:54,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 31 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:45:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 14:45:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2023-04-02 14:45:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-04-02 14:45:54,632 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 32 [2023-04-02 14:45:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:54,632 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-04-02 14:45:54,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-04-02 14:45:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 14:45:54,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:54,635 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:54,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:54,841 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 14:45:54,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:54,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -457836031, now seen corresponding path program 4 times [2023-04-02 14:45:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799546798] [2023-04-02 14:45:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:54,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:54,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997106441] [2023-04-02 14:45:54,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:45:54,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:54,870 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 14:45:54,888 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 14:45:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:55,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:45:55,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:45:55,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:45:55,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:55,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799546798] [2023-04-02 14:45:55,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:55,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997106441] [2023-04-02 14:45:55,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997106441] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:55,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525496738] [2023-04-02 14:45:55,890 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:55,890 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:55,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:55,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:55,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:55,930 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:56,272 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:45:56,277 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2023-04-02 14:45:56,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:56,286 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:57,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1857#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:57,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:57,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:57,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 14:45:57,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388274377] [2023-04-02 14:45:57,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:57,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 14:45:57,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:57,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 14:45:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=3022, Unknown=0, NotChecked=0, Total=4290 [2023-04-02 14:45:57,124 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:58,469 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2023-04-02 14:45:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 14:45:58,469 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2023-04-02 14:45:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:58,472 INFO L225 Difference]: With dead ends: 220 [2023-04-02 14:45:58,472 INFO L226 Difference]: Without dead ends: 205 [2023-04-02 14:45:58,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2418, Invalid=5414, Unknown=0, NotChecked=0, Total=7832 [2023-04-02 14:45:58,476 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 337 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:58,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 55 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:45:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-04-02 14:45:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 71. [2023-04-02 14:45:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2023-04-02 14:45:58,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 44 [2023-04-02 14:45:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:58,535 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2023-04-02 14:45:58,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2023-04-02 14:45:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 14:45:58,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:58,536 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:58,545 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 14:45:58,743 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 14:45:58,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:58,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:58,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1730240511, now seen corresponding path program 5 times [2023-04-02 14:45:58,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:58,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368828009] [2023-04-02 14:45:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:58,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:58,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728555255] [2023-04-02 14:45:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:45:58,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:58,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:58,810 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 14:45:58,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process