/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-patterns/array22_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:54:42,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:54:42,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:54:42,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:54:42,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:54:42,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:54:42,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:54:42,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:54:42,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:54:42,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:54:42,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:54:42,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:54:42,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:54:42,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:54:42,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:54:42,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:54:42,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:54:42,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:54:42,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:54:42,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:54:42,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:54:42,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:54:42,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:54:42,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:54:42,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:54:42,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:54:42,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:54:42,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:54:42,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:54:42,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:54:42,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:54:42,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:54:42,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:54:42,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:54:42,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:54:42,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:54:42,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:54:42,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:54:42,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:54:42,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:54:42,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:54:42,333 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 [2023-03-31 20:54:42,346 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:54:42,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:54:42,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:54:42,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:54:42,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:54:42,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:54:42,347 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:54:42,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:54:42,348 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:54:42,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:54:42,349 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:54:42,349 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:54:42,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:54:42,349 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:54:42,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:54:42,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:54:42,351 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:54:42,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:54:42,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:54:42,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:54:42,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:54:42,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:54:42,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:54:42,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:54:42,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:54:42,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:54:42,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:54:42,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:54:42,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:54:42,531 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:54:42,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array22_pattern.c [2023-03-31 20:54:43,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:54:43,718 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:54:43,719 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c [2023-03-31 20:54:43,727 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16166196d/9ec4361c368047f5b3aa2d7aab57314b/FLAG39d217172 [2023-03-31 20:54:43,738 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16166196d/9ec4361c368047f5b3aa2d7aab57314b [2023-03-31 20:54:43,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:54:43,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:54:43,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:54:43,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:54:43,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:54:43,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aab1af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43, skipping insertion in model container [2023-03-31 20:54:43,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:54:43,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:54:43,855 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-patterns/array22_pattern.c[1347,1360] [2023-03-31 20:54:43,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:54:43,881 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:54:43,892 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-patterns/array22_pattern.c[1347,1360] [2023-03-31 20:54:43,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:54:43,924 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:54:43,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43 WrapperNode [2023-03-31 20:54:43,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:54:43,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:54:43,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:54:43,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:54:43,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:54:43,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:54:43,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:54:43,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:54:43,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (1/1) ... [2023-03-31 20:54:43,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:54:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:44,001 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) [2023-03-31 20:54:44,004 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 [2023-03-31 20:54:44,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:54:44,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:54:44,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:54:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:54:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:54:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-03-31 20:54:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:54:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:54:44,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:54:44,088 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:54:44,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:54:44,294 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:54:44,379 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:54:44,380 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 20:54:44,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:54:44 BoogieIcfgContainer [2023-03-31 20:54:44,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:54:44,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:54:44,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:54:44,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:54:44,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:54:43" (1/3) ... [2023-03-31 20:54:44,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218d4a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:54:44, skipping insertion in model container [2023-03-31 20:54:44,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:54:43" (2/3) ... [2023-03-31 20:54:44,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218d4a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:54:44, skipping insertion in model container [2023-03-31 20:54:44,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:54:44" (3/3) ... [2023-03-31 20:54:44,388 INFO L112 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2023-03-31 20:54:44,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:54:44,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:54:44,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:54:44,457 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;@6aa60376, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:54:44,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:54:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 20:54:44,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:54:44,467 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:44,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:44,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:44,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 326903352, now seen corresponding path program 1 times [2023-03-31 20:54:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5652682] [2023-03-31 20:54:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:44,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68272232] [2023-03-31 20:54:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:44,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:44,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:44,628 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) [2023-03-31 20:54:44,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:54:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:44,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 20:54:44,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:54:44,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:44,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:44,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5652682] [2023-03-31 20:54:44,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:44,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68272232] [2023-03-31 20:54:44,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68272232] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:44,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:44,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 20:54:44,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413963455] [2023-03-31 20:54:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:44,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 20:54:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 20:54:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:54:44,819 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-31 20:54:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:44,875 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-03-31 20:54:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 20:54:44,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2023-03-31 20:54:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:44,883 INFO L225 Difference]: With dead ends: 49 [2023-03-31 20:54:44,883 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 20:54:44,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:54:44,890 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:44,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 20:54:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 20:54:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-03-31 20:54:44,925 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2023-03-31 20:54:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:44,926 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-03-31 20:54:44,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-31 20:54:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-03-31 20:54:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 20:54:44,928 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:44,928 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 20:54:44,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:54:45,131 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 [2023-03-31 20:54:45,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:45,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -519104959, now seen corresponding path program 1 times [2023-03-31 20:54:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011047160] [2023-03-31 20:54:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:45,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:45,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:45,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221226487] [2023-03-31 20:54:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:45,161 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) [2023-03-31 20:54:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:54:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:45,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:54:45,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 20:54:45,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:45,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011047160] [2023-03-31 20:54:45,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221226487] [2023-03-31 20:54:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221226487] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:45,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:54:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770907135] [2023-03-31 20:54:45,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:54:45,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:54:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:45,340 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:45,406 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-03-31 20:54:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 20:54:45,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-03-31 20:54:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:45,409 INFO L225 Difference]: With dead ends: 36 [2023-03-31 20:54:45,409 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:54:45,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 20:54:45,412 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:45,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:54:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 20:54:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-03-31 20:54:45,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 32 [2023-03-31 20:54:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:45,427 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-03-31 20:54:45,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-03-31 20:54:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 20:54:45,428 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:45,428 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:45,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:45,632 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 [2023-03-31 20:54:45,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:45,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash 307823926, now seen corresponding path program 1 times [2023-03-31 20:54:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:45,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136061622] [2023-03-31 20:54:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:45,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:45,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846242347] [2023-03-31 20:54:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:45,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:45,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:45,650 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) [2023-03-31 20:54:45,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:54:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:45,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:54:45,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 20:54:45,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:45,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136061622] [2023-03-31 20:54:45,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846242347] [2023-03-31 20:54:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846242347] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:45,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:54:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235643909] [2023-03-31 20:54:45,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:54:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:54:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:45,783 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:45,874 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2023-03-31 20:54:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:54:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2023-03-31 20:54:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:45,876 INFO L225 Difference]: With dead ends: 59 [2023-03-31 20:54:45,876 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 20:54:45,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 20:54:45,879 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:45,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 69 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:54:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 20:54:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2023-03-31 20:54:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-03-31 20:54:45,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 35 [2023-03-31 20:54:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:45,899 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-03-31 20:54:45,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-03-31 20:54:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 20:54:45,900 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:45,901 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:45,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:46,106 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 [2023-03-31 20:54:46,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:46,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1003375879, now seen corresponding path program 1 times [2023-03-31 20:54:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:46,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257510016] [2023-03-31 20:54:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:46,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:46,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876065135] [2023-03-31 20:54:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:46,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:46,122 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) [2023-03-31 20:54:46,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:54:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:46,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:54:46,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:54:46,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:54:46,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257510016] [2023-03-31 20:54:46,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:46,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876065135] [2023-03-31 20:54:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876065135] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:54:46,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:54:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:54:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254767943] [2023-03-31 20:54:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:54:46,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:54:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:54:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:54:46,209 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:46,240 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2023-03-31 20:54:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:54:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-03-31 20:54:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:46,241 INFO L225 Difference]: With dead ends: 58 [2023-03-31 20:54:46,241 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 20:54:46,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:54:46,242 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:46,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:54:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 20:54:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-03-31 20:54:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-03-31 20:54:46,248 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 37 [2023-03-31 20:54:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:46,248 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-03-31 20:54:46,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:54:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-03-31 20:54:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 20:54:46,249 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:46,249 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:46,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:46,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:46,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:46,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash -558031651, now seen corresponding path program 1 times [2023-03-31 20:54:46,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:46,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717746094] [2023-03-31 20:54:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:46,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:46,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:46,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550983572] [2023-03-31 20:54:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:46,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:46,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:46,469 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) [2023-03-31 20:54:46,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:54:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:54:46,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:54:46,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:54:46,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:54:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 20:54:46,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717746094] [2023-03-31 20:54:46,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550983572] [2023-03-31 20:54:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550983572] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:54:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501452045] [2023-03-31 20:54:46,637 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 20:54:46,638 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:54:46,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:54:46,643 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:54:46,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:54:46,697 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:54:47,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-03-31 20:54:47,193 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-03-31 20:54:47,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:54:47,199 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 8 for LOIs [2023-03-31 20:54:47,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:54:47,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1176#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0))' at error location [2023-03-31 20:54:47,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:54:47,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:54:47,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-03-31 20:54:47,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010930754] [2023-03-31 20:54:47,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:54:47,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:54:47,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:54:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=930, Unknown=11, NotChecked=0, Total=1056 [2023-03-31 20:54:47,941 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 7 states have (on average 4.0) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 20:54:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:48,021 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-03-31 20:54:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:54:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 38 [2023-03-31 20:54:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:48,022 INFO L225 Difference]: With dead ends: 62 [2023-03-31 20:54:48,022 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:54:48,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=991, Unknown=11, NotChecked=0, Total=1122 [2023-03-31 20:54:48,023 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:48,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 67 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:54:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:54:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-31 20:54:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-03-31 20:54:48,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 38 [2023-03-31 20:54:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:48,028 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-03-31 20:54:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.0) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 20:54:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-03-31 20:54:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 20:54:48,029 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:48,029 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:48,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:48,234 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:48,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1409850954, now seen corresponding path program 2 times [2023-03-31 20:54:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260429997] [2023-03-31 20:54:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:48,246 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:48,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650826982] [2023-03-31 20:54:48,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:54:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:48,269 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) [2023-03-31 20:54:48,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:54:48,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:54:48,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:54:48,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:54:48,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:54:48,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:54:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 20:54:48,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:54:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260429997] [2023-03-31 20:54:48,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:54:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650826982] [2023-03-31 20:54:48,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650826982] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:54:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679470744] [2023-03-31 20:54:48,431 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 20:54:48,431 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:54:48,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:54:48,432 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:54:48,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:54:48,448 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:54:48,725 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-03-31 20:54:48,728 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-03-31 20:54:48,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:54:48,731 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 8 for LOIs [2023-03-31 20:54:48,733 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:54:49,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1613#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0))' at error location [2023-03-31 20:54:49,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:54:49,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:54:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-03-31 20:54:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103409241] [2023-03-31 20:54:49,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:54:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:54:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:54:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:54:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=930, Unknown=11, NotChecked=0, Total=1056 [2023-03-31 20:54:49,346 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 20:54:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:54:49,423 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2023-03-31 20:54:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 20:54:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 40 [2023-03-31 20:54:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:54:49,424 INFO L225 Difference]: With dead ends: 74 [2023-03-31 20:54:49,424 INFO L226 Difference]: Without dead ends: 51 [2023-03-31 20:54:49,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=1052, Unknown=11, NotChecked=0, Total=1190 [2023-03-31 20:54:49,426 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:54:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:54:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-31 20:54:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-03-31 20:54:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:54:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-03-31 20:54:49,431 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 40 [2023-03-31 20:54:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:54:49,431 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-03-31 20:54:49,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 20:54:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-03-31 20:54:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-03-31 20:54:49,432 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:54:49,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:54:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:54:49,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:49,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:54:49,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:54:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1874165163, now seen corresponding path program 3 times [2023-03-31 20:54:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:54:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342086878] [2023-03-31 20:54:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:54:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:54:49,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:54:49,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418935829] [2023-03-31 20:54:49,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:54:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:54:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:54:49,648 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) [2023-03-31 20:54:49,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:54:50,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:54:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:54:50,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 97 conjunts are in the unsatisfiable core [2023-03-31 20:54:50,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:54:50,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 20:54:50,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-03-31 20:54:50,551 INFO L321 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-03-31 20:54:50,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2023-03-31 20:54:50,598 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-03-31 20:54:50,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2023-03-31 20:54:58,425 INFO L321 Elim1Store]: treesize reduction 111, result has 40.0 percent of original size [2023-03-31 20:54:58,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 102 [2023-03-31 20:55:04,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 153 [2023-03-31 20:55:05,128 INFO L321 Elim1Store]: treesize reduction 549, result has 7.7 percent of original size [2023-03-31 20:55:05,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 152 treesize of output 254 [2023-03-31 20:55:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:05,326 INFO L321 Elim1Store]: treesize reduction 113, result has 47.4 percent of original size [2023-03-31 20:55:05,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 155 treesize of output 178 [2023-03-31 20:55:31,589 WARN L223 SmtUtils]: Spent 10.65s on a formula simplification. DAG size of input: 202 DAG size of output: 60 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-03-31 20:55:31,589 INFO L321 Elim1Store]: treesize reduction 842, result has 9.6 percent of original size [2023-03-31 20:55:31,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 325 treesize of output 202 [2023-03-31 20:55:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:55:41,482 INFO L327 TraceCheckSpWp]: Computing backward predicates...