/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:18:49,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:18:49,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:18:49,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:18:49,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:18:49,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:18:49,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:18:49,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:18:49,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:18:49,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:18:49,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:18:49,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:18:49,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:18:49,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:18:49,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:18:49,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:18:49,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:18:49,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:18:49,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:18:49,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:18:49,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:18:49,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:18:49,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:18:49,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:18:49,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:18:49,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:18:49,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:18:49,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:18:49,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:18:49,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:18:49,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:18:49,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:18:49,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:18:49,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:18:49,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:18:49,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:18:49,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:18:49,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:18:49,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:18:49,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:18:49,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:18:49,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:18:49,484 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:18:49,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:18:49,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:18:49,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:18:49,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:18:49,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:18:49,486 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:18:49,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:18:49,486 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:18:49,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:18:49,487 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:18:49,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:18:49,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:18:49,487 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:18:49,487 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:18:49,487 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:18:49,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:18:49,488 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:18:49,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:18:49,488 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:18:49,489 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:18:49,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:18:49,490 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:18:49,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:18:49,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:18:49,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:18:49,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:18:49,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:18:49,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:18:49,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:18:49,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:18:49,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:18:49,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:18:49,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:18:49,764 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:18:49,764 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:18:49,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-04-01 05:18:50,896 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:18:51,118 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:18:51,118 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-04-01 05:18:51,124 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57c1545c8/58746393a30542b09ce916da9e516bbf/FLAGf7cc654e4 [2023-04-01 05:18:51,139 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57c1545c8/58746393a30542b09ce916da9e516bbf [2023-04-01 05:18:51,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:18:51,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:18:51,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:18:51,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:18:51,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:18:51,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b8dd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51, skipping insertion in model container [2023-04-01 05:18:51,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:18:51,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:18:51,286 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2023-04-01 05:18:51,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:18:51,322 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:18:51,333 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2023-04-01 05:18:51,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:18:51,352 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:18:51,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51 WrapperNode [2023-04-01 05:18:51,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:18:51,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:18:51,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:18:51,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:18:51,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,379 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:18:51,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:18:51,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:18:51,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:18:51,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (1/1) ... [2023-04-01 05:18:51,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:18:51,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:51,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:18:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:18:51,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:18:51,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:18:51,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:18:51,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:18:51,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:18:51,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:18:51,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:18:51,445 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:18:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:18:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:18:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:18:51,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:18:51,502 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:18:51,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:18:51,731 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:18:51,754 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:18:51,754 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 05:18:51,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:18:51 BoogieIcfgContainer [2023-04-01 05:18:51,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:18:51,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:18:51,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:18:51,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:18:51,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:18:51" (1/3) ... [2023-04-01 05:18:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:18:51, skipping insertion in model container [2023-04-01 05:18:51,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:51" (2/3) ... [2023-04-01 05:18:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:18:51, skipping insertion in model container [2023-04-01 05:18:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:18:51" (3/3) ... [2023-04-01 05:18:51,764 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2023-04-01 05:18:51,778 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:18:51,778 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:18:51,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:18:51,839 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;@328a5786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:18:51,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:18:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:18:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:18:51,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:51,871 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:51,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:51,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1897632913, now seen corresponding path program 1 times [2023-04-01 05:18:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:51,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595940573] [2023-04-01 05:18:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:52,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:52,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595940573] [2023-04-01 05:18:52,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:18:52,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43669251] [2023-04-01 05:18:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:52,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:52,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:52,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:18:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:52,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:18:52,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:18:52,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43669251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:52,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:18:52,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743346266] [2023-04-01 05:18:52,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:52,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:18:52,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:52,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:18:52,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:18:52,294 INFO L87 Difference]: Start difference. First operand has 36 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:52,329 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2023-04-01 05:18:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:18:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-01 05:18:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:52,338 INFO L225 Difference]: With dead ends: 59 [2023-04-01 05:18:52,338 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 05:18:52,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:18:52,343 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:52,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 05:18:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 05:18:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:18:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-04-01 05:18:52,375 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 24 [2023-04-01 05:18:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:52,377 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-04-01 05:18:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-04-01 05:18:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 05:18:52,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:52,379 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:52,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:52,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:18:52,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:52,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1548109508, now seen corresponding path program 1 times [2023-04-01 05:18:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:52,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93463591] [2023-04-01 05:18:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:52,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:52,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072728223] [2023-04-01 05:18:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:52,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:52,621 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) [2023-04-01 05:18:52,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:18:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:52,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:18:52,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:18:52,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:52,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93463591] [2023-04-01 05:18:52,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:52,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072728223] [2023-04-01 05:18:52,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072728223] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:52,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:52,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:18:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274612023] [2023-04-01 05:18:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:18:52,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:18:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:18:52,755 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:52,876 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-04-01 05:18:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:18:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2023-04-01 05:18:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:52,878 INFO L225 Difference]: With dead ends: 51 [2023-04-01 05:18:52,878 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 05:18:52,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:18:52,880 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:52,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:18:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 05:18:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-04-01 05:18:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:18:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-04-01 05:18:52,894 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 25 [2023-04-01 05:18:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:52,895 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-04-01 05:18:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-04-01 05:18:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 05:18:52,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:52,898 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:52,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 05:18:53,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:53,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1414952, now seen corresponding path program 1 times [2023-04-01 05:18:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980080023] [2023-04-01 05:18:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:53,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482647015] [2023-04-01 05:18:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:53,135 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) [2023-04-01 05:18:53,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:18:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:53,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 05:18:53,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:18:53,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:18:53,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:53,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980080023] [2023-04-01 05:18:53,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:53,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482647015] [2023-04-01 05:18:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482647015] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:18:53,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:18:53,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-04-01 05:18:53,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685051947] [2023-04-01 05:18:53,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:53,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:18:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:18:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:18:53,594 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:53,686 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-04-01 05:18:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:18:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2023-04-01 05:18:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:53,688 INFO L225 Difference]: With dead ends: 50 [2023-04-01 05:18:53,688 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 05:18:53,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:18:53,690 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:53,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 05:18:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-01 05:18:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 05:18:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-04-01 05:18:53,701 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 28 [2023-04-01 05:18:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:53,702 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-04-01 05:18:53,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:18:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-04-01 05:18:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 05:18:53,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:53,703 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:53,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:53,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:53,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:53,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2146803478, now seen corresponding path program 1 times [2023-04-01 05:18:53,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:53,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225745536] [2023-04-01 05:18:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:53,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:53,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397212950] [2023-04-01 05:18:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:53,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:53,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:53,936 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) [2023-04-01 05:18:53,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:18:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:53,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 05:18:53,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:18:54,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:18:54,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:54,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225745536] [2023-04-01 05:18:54,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397212950] [2023-04-01 05:18:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397212950] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:18:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565909117] [2023-04-01 05:18:54,154 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 05:18:54,154 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:54,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:54,162 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:54,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:54,224 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:18:55,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:18:55,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:18:55,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:57,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [565909117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:57,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:18:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 7] total 21 [2023-04-01 05:18:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841307911] [2023-04-01 05:18:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:57,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:18:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:18:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:18:57,816 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 05:18:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:59,195 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2023-04-01 05:18:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:18:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2023-04-01 05:18:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:59,197 INFO L225 Difference]: With dead ends: 85 [2023-04-01 05:18:59,197 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 05:18:59,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:18:59,199 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:59,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 7 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:18:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 05:18:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2023-04-01 05:18:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 05:18:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-04-01 05:18:59,227 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 30 [2023-04-01 05:18:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:59,228 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-04-01 05:18:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 05:18:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-04-01 05:18:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 05:18:59,229 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:59,229 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-01 05:18:59,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:59,437 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 [2023-04-01 05:18:59,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:59,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash -874024117, now seen corresponding path program 1 times [2023-04-01 05:18:59,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:59,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502327970] [2023-04-01 05:18:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:59,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122653048] [2023-04-01 05:18:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:59,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:59,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:59,457 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) [2023-04-01 05:18:59,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:18:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:59,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:18:59,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:18:59,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:59,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:59,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502327970] [2023-04-01 05:18:59,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:59,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122653048] [2023-04-01 05:18:59,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122653048] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:18:59,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603682254] [2023-04-01 05:18:59,724 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 05:18:59,724 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:59,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:59,724 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:59,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:59,748 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:18:59,936 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:18:59,939 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:18:59,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:18:59,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:19:00,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [603682254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:19:00,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:19:00,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [10] total 25 [2023-04-01 05:19:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699747723] [2023-04-01 05:19:00,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:19:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:19:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:00,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:19:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:19:00,548 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 17 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:19:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:01,769 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2023-04-01 05:19:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 05:19:01,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2023-04-01 05:19:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:01,771 INFO L225 Difference]: With dead ends: 76 [2023-04-01 05:19:01,771 INFO L226 Difference]: Without dead ends: 74 [2023-04-01 05:19:01,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 05:19:01,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:01,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 9 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:19:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-01 05:19:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2023-04-01 05:19:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 05:19:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2023-04-01 05:19:01,802 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 33 [2023-04-01 05:19:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:01,803 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2023-04-01 05:19:01,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:19:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2023-04-01 05:19:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 05:19:01,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:01,804 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:19:01,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:02,012 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 [2023-04-01 05:19:02,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:02,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash -562648306, now seen corresponding path program 1 times [2023-04-01 05:19:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506082376] [2023-04-01 05:19:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:02,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:02,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665955144] [2023-04-01 05:19:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:02,029 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) [2023-04-01 05:19:02,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:19:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:02,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 05:19:02,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:19:02,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:19:02,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506082376] [2023-04-01 05:19:02,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:02,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665955144] [2023-04-01 05:19:02,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665955144] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:19:02,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135106691] [2023-04-01 05:19:02,303 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:19:02,303 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:19:02,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:19:02,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:19:02,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:19:02,318 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:19:03,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 92 for LOIs [2023-04-01 05:19:03,252 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:19:03,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:19:03,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:19:05,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1818#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:19:05,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:19:05,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:19:05,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-01 05:19:05,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602421598] [2023-04-01 05:19:05,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:19:05,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:19:05,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:05,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:19:05,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:19:05,981 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:19:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:06,161 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2023-04-01 05:19:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:19:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-04-01 05:19:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:06,177 INFO L225 Difference]: With dead ends: 99 [2023-04-01 05:19:06,177 INFO L226 Difference]: Without dead ends: 97 [2023-04-01 05:19:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:19:06,180 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 52 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:06,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 179 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:19:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-01 05:19:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2023-04-01 05:19:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 61 states have internal predecessors, (72), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 05:19:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2023-04-01 05:19:06,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 33 [2023-04-01 05:19:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:06,216 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2023-04-01 05:19:06,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:19:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2023-04-01 05:19:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 05:19:06,218 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:06,218 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-01 05:19:06,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:06,423 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 [2023-04-01 05:19:06,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:06,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1229660379, now seen corresponding path program 1 times [2023-04-01 05:19:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989996415] [2023-04-01 05:19:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:06,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:06,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852788341] [2023-04-01 05:19:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:06,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:06,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:06,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:19:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:06,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 05:19:06,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:19:06,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:19:06,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989996415] [2023-04-01 05:19:06,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852788341] [2023-04-01 05:19:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852788341] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:19:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077999307] [2023-04-01 05:19:06,941 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 05:19:06,941 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:19:06,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:19:06,942 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:19:06,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:19:06,963 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:19:08,062 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:19:08,066 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:19:08,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:19:08,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:19:10,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2378#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:19:10,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:19:10,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:19:10,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-04-01 05:19:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344003221] [2023-04-01 05:19:10,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:19:10,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:19:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:19:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 05:19:10,586 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 05:19:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:17,606 INFO L93 Difference]: Finished difference Result 135 states and 178 transitions. [2023-04-01 05:19:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 05:19:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 38 [2023-04-01 05:19:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:17,612 INFO L225 Difference]: With dead ends: 135 [2023-04-01 05:19:17,612 INFO L226 Difference]: Without dead ends: 133 [2023-04-01 05:19:17,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=329, Invalid=2221, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 05:19:17,613 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:17,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 162 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 05:19:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-01 05:19:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-04-01 05:19:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 78 states have internal predecessors, (90), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 05:19:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 150 transitions. [2023-04-01 05:19:17,672 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 150 transitions. Word has length 38 [2023-04-01 05:19:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:17,673 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 150 transitions. [2023-04-01 05:19:17,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 05:19:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 150 transitions. [2023-04-01 05:19:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 05:19:17,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:17,674 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:19:17,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:17,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:17,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash -918284568, now seen corresponding path program 2 times [2023-04-01 05:19:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:17,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216469362] [2023-04-01 05:19:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:17,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055867737] [2023-04-01 05:19:17,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:19:17,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:17,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:17,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:19:17,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:19:17,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:19:17,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:19:17,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:19:17,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:19:17,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:17,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216469362] [2023-04-01 05:19:17,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:17,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055867737] [2023-04-01 05:19:17,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055867737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:19:17,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:19:17,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:19:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103527566] [2023-04-01 05:19:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:19:17,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:19:17,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:19:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:19:17,972 INFO L87 Difference]: Start difference. First operand 115 states and 150 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:19:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:18,113 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2023-04-01 05:19:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:19:18,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-04-01 05:19:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:18,115 INFO L225 Difference]: With dead ends: 157 [2023-04-01 05:19:18,115 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 05:19:18,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:19:18,116 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:18,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 131 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:19:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 05:19:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2023-04-01 05:19:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 70 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 05:19:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2023-04-01 05:19:18,174 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 38 [2023-04-01 05:19:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2023-04-01 05:19:18,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:19:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2023-04-01 05:19:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 05:19:18,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:18,176 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 05:19:18,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:18,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 05:19:18,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:18,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 949205294, now seen corresponding path program 1 times [2023-04-01 05:19:18,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:18,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408226055] [2023-04-01 05:19:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:18,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:18,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:18,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954357986] [2023-04-01 05:19:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:18,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:18,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:18,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:19:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:18,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 05:19:18,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:19:18,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 05:19:18,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:18,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408226055] [2023-04-01 05:19:18,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:18,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954357986] [2023-04-01 05:19:18,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954357986] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:19:18,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:19:18,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-01 05:19:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26153387] [2023-04-01 05:19:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:19:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:19:18,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:19:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:19:18,645 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:19:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:18,745 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2023-04-01 05:19:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:19:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-01 05:19:18,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:18,751 INFO L225 Difference]: With dead ends: 128 [2023-04-01 05:19:18,751 INFO L226 Difference]: Without dead ends: 126 [2023-04-01 05:19:18,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-04-01 05:19:18,751 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:18,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:19:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-01 05:19:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-04-01 05:19:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 39 states have call successors, (39), 11 states have call predecessors, (39), 10 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 05:19:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2023-04-01 05:19:18,810 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 43 [2023-04-01 05:19:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:18,811 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2023-04-01 05:19:18,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 05:19:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2023-04-01 05:19:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 05:19:18,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:18,812 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2023-04-01 05:19:18,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:19,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:19,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1097192581, now seen corresponding path program 1 times [2023-04-01 05:19:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616214325] [2023-04-01 05:19:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:19,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:19,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791525091] [2023-04-01 05:19:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:19,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:19,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 05:19:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:19,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 05:19:19,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 05:19:19,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 05:19:19,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616214325] [2023-04-01 05:19:19,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791525091] [2023-04-01 05:19:19,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791525091] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:19:19,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:19:19,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-04-01 05:19:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979019213] [2023-04-01 05:19:19,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:19:19,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:19:19,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:19:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:19:19,450 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:19:19,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:19,559 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2023-04-01 05:19:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:19:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-04-01 05:19:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:19,561 INFO L225 Difference]: With dead ends: 129 [2023-04-01 05:19:19,561 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 05:19:19,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:19:19,562 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:19,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:19:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 05:19:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 05:19:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 05:19:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2023-04-01 05:19:19,619 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 48 [2023-04-01 05:19:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:19,619 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2023-04-01 05:19:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 05:19:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2023-04-01 05:19:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 05:19:19,621 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:19,621 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:19:19,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 05:19:19,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:19:19,825 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:19,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash 656042662, now seen corresponding path program 1 times [2023-04-01 05:19:19,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:19,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213014031] [2023-04-01 05:19:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:19,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:19,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:19,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151816712] [2023-04-01 05:19:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:19,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:19,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:19,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:19,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 05:19:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:19,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 58 conjunts are in the unsatisfiable core [2023-04-01 05:19:19,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:19:20,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 05:19:21,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213014031] [2023-04-01 05:19:21,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151816712] [2023-04-01 05:19:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151816712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:19:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693083703] [2023-04-01 05:19:21,467 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-04-01 05:19:21,467 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:19:21,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:19:21,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:19:21,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:19:21,480 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:19:27,970 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:19:27,973 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:19:27,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:19:27,976 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:19:32,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5049#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:19:32,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:19:32,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:19:32,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2023-04-01 05:19:32,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263449730] [2023-04-01 05:19:32,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:19:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 05:19:32,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 05:19:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 05:19:32,227 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 25 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:19:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:41,362 INFO L93 Difference]: Finished difference Result 338 states and 469 transitions. [2023-04-01 05:19:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 05:19:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 55 [2023-04-01 05:19:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:41,365 INFO L225 Difference]: With dead ends: 338 [2023-04-01 05:19:41,365 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 05:19:41,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=644, Invalid=4468, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 05:19:41,368 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 168 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:41,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 217 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 05:19:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 05:19:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2023-04-01 05:19:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 136 states have internal predecessors, (158), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (57), 55 states have call predecessors, (57), 57 states have call successors, (57) [2023-04-01 05:19:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 274 transitions. [2023-04-01 05:19:41,509 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 274 transitions. Word has length 55 [2023-04-01 05:19:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:41,510 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 274 transitions. [2023-04-01 05:19:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:19:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 274 transitions. [2023-04-01 05:19:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 05:19:41,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:41,511 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 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] [2023-04-01 05:19:41,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 05:19:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 05:19:41,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:19:41,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:19:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash -537054492, now seen corresponding path program 1 times [2023-04-01 05:19:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:19:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870042266] [2023-04-01 05:19:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:19:41,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:19:41,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407031162] [2023-04-01 05:19:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:19:41,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:19:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:19:41,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:19:41,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 05:19:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:19:41,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 05:19:41,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:19:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:19:42,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:19:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 05:19:42,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:19:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870042266] [2023-04-01 05:19:42,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:19:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407031162] [2023-04-01 05:19:42,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407031162] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:19:42,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752999064] [2023-04-01 05:19:42,503 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 05:19:42,504 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:19:42,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:19:42,504 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:19:42,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:19:42,517 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:19:51,807 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:19:51,810 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:19:51,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:19:51,813 INFO L180 IcfgInterpreter]: Interpretation finished