/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:58:49,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:58:49,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:58:49,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:58:49,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:58:49,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:58:49,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:58:49,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:58:49,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:58:49,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:58:49,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:58:49,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:58:49,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:58:49,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:58:49,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:58:49,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:58:49,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:58:49,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:58:49,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:58:49,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:58:49,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:58:49,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:58:49,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:58:49,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:58:49,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 13:58:49,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 13:58:49,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 13:58:49,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 13:58:49,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 13:58:49,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 13:58:49,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:58:49,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:58:49,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:58:49,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:58:49,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:58:49,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:58:49,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:58:49,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:58:49,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:58:49,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:58:49,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:58:49,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 13:58:49,349 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:58:49,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:58:49,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:58:49,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:58:49,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:58:49,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:58:49,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:58:49,351 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:58:49,352 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:58:49,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:58:49,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:58:49,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:58:49,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:49,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:58:49,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:58:49,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:58:49,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:58:49,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:58:49,537 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:58:49,537 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:58:49,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2023-04-02 13:58:50,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:58:50,724 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:58:50,724 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2023-04-02 13:58:50,729 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a60a1031c/497d3775437a49889680065ad49d6d6c/FLAG201e8c7ef [2023-04-02 13:58:51,147 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a60a1031c/497d3775437a49889680065ad49d6d6c [2023-04-02 13:58:51,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:58:51,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:58:51,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:51,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:58:51,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:58:51,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4506f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51, skipping insertion in model container [2023-04-02 13:58:51,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:58:51,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:58:51,279 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2023-04-02 13:58:51,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:51,296 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:58:51,303 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2023-04-02 13:58:51,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:51,318 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:58:51,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51 WrapperNode [2023-04-02 13:58:51,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:51,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:58:51,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:58:51,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:58:51,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:58:51,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:58:51,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:58:51,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:58:51,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (1/1) ... [2023-04-02 13:58:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:51,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:51,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 13:58:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 13:58:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:58:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:58:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:58:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:58:51,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:58:51,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:58:51,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:58:51,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:58:51,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:58:51,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:58:51,495 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:58:51,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:58:51,709 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:58:51,757 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:58:51,758 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-02 13:58:51,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:51 BoogieIcfgContainer [2023-04-02 13:58:51,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:58:51,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:58:51,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:58:51,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:58:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:58:51" (1/3) ... [2023-04-02 13:58:51,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4f77be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:51, skipping insertion in model container [2023-04-02 13:58:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:51" (2/3) ... [2023-04-02 13:58:51,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4f77be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:51, skipping insertion in model container [2023-04-02 13:58:51,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:51" (3/3) ... [2023-04-02 13:58:51,764 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2023-04-02 13:58:51,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:58:51,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:58:51,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:58:51,815 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;@627395b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:58:51,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:58:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:58:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 13:58:51,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:51,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:51,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:51,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1974816124, now seen corresponding path program 1 times [2023-04-02 13:58:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571075092] [2023-04-02 13:58:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:51,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:58:52,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:52,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571075092] [2023-04-02 13:58:52,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571075092] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:52,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:52,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898023925] [2023-04-02 13:58:52,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:52,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:52,133 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:52,177 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2023-04-02 13:58:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-02 13:58:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:52,185 INFO L225 Difference]: With dead ends: 45 [2023-04-02 13:58:52,186 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 13:58:52,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:52,194 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 13:58:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 13:58:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-04-02 13:58:52,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 18 [2023-04-02 13:58:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:52,215 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-04-02 13:58:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-04-02 13:58:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 13:58:52,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:52,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:58:52,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:52,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:52,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1360550747, now seen corresponding path program 1 times [2023-04-02 13:58:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:52,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406433553] [2023-04-02 13:58:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:58:52,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:52,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406433553] [2023-04-02 13:58:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406433553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530793180] [2023-04-02 13:58:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:52,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:52,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 13:58:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 13:58:52,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:58:52,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 13:58:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530793180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:52,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 13:58:52,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 13:58:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454255574] [2023-04-02 13:58:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:52,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:58:52,408 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:52,446 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2023-04-02 13:58:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 13:58:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:52,448 INFO L225 Difference]: With dead ends: 45 [2023-04-02 13:58:52,448 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 13:58:52,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 13:58:52,450 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:52,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 13:58:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 13:58:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-02 13:58:52,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2023-04-02 13:58:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:52,454 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-02 13:58:52,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-02 13:58:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 13:58:52,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:52,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:52,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 13:58:52,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:52,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:52,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1332389312, now seen corresponding path program 1 times [2023-04-02 13:58:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:52,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292186912] [2023-04-02 13:58:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:58:52,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292186912] [2023-04-02 13:58:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292186912] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694103098] [2023-04-02 13:58:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:52,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:52,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 13:58:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:52,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:58:52,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 13:58:52,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694103098] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:52,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944562485] [2023-04-02 13:58:53,008 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:58:53,008 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:53,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:53,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:53,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:53,058 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:53,147 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:58:53,341 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:58:55,524 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:55,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:55,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:56,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_main_~#a8~0.base_BEFORE_CALL_1| Int)) (and (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_1| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:56,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:56,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488186883] [2023-04-02 13:58:56,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:56,801 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:56,840 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2023-04-02 13:58:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-02 13:58:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:56,841 INFO L225 Difference]: With dead ends: 56 [2023-04-02 13:58:56,841 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 13:58:56,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:56,842 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:56,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 13:58:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 13:58:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-04-02 13:58:56,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 26 [2023-04-02 13:58:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:56,846 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-04-02 13:58:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-04-02 13:58:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 13:58:56,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:56,846 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, 1] [2023-04-02 13:58:56,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 13:58:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 13:58:57,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:57,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1079991607, now seen corresponding path program 2 times [2023-04-02 13:58:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600651678] [2023-04-02 13:58:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 13:58:57,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600651678] [2023-04-02 13:58:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600651678] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:57,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817283380] [2023-04-02 13:58:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:57,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:57,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:58:57,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 13:58:57,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:58:57,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:57,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:57,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 13:58:57,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 13:58:57,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817283380] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:57,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764955849] [2023-04-02 13:58:57,239 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:58:57,239 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:57,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:57,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:57,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:57,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:57,292 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:58:57,386 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:58:58,910 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:58,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:58,922 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:59,837 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '837#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a8~0.base_BEFORE_CALL_2| Int) (|v_main_~#a1~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_2|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_2| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:59,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:59,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:59,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146476665] [2023-04-02 13:58:59,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:59,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:59,839 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:59,906 INFO L93 Difference]: Finished difference Result 75 states and 110 transitions. [2023-04-02 13:58:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 13:58:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:59,907 INFO L225 Difference]: With dead ends: 75 [2023-04-02 13:58:59,907 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 13:58:59,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:59,925 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:59,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:58:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 13:58:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-02 13:58:59,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:58:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-04-02 13:58:59,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 29 [2023-04-02 13:58:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:59,935 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-04-02 13:58:59,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:58:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-04-02 13:58:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 13:58:59,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:59,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:59,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:00,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:00,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1638904316, now seen corresponding path program 3 times [2023-04-02 13:59:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906428976] [2023-04-02 13:59:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:00,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906428976] [2023-04-02 13:59:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906428976] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569574913] [2023-04-02 13:59:00,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:00,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:00,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:00,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 13:59:00,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:00,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:59:00,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:00,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569574913] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778906793] [2023-04-02 13:59:00,579 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:00,579 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:00,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:00,580 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:00,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:00,594 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:00,621 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:00,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:02,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:02,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:02,196 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:03,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1396#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a8~0.base_BEFORE_CALL_3| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_3|) 0))) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_3| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:03,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:03,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:03,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:59:03,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351100044] [2023-04-02 13:59:03,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:59:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:59:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:59:03,406 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:03,496 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2023-04-02 13:59:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:59:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-02 13:59:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:03,496 INFO L225 Difference]: With dead ends: 104 [2023-04-02 13:59:03,496 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 13:59:03,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:59:03,497 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:03,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 13:59:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-02 13:59:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-04-02 13:59:03,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 50 [2023-04-02 13:59:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:03,502 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-04-02 13:59:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-04-02 13:59:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 13:59:03,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:03,503 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:03,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:03,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:03,710 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:03,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1191086428, now seen corresponding path program 4 times [2023-04-02 13:59:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505152921] [2023-04-02 13:59:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:04,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:04,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505152921] [2023-04-02 13:59:04,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505152921] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:04,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324852788] [2023-04-02 13:59:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:59:04,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:04,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:04,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:59:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:04,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:59:04,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:04,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:04,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324852788] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:04,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571564036] [2023-04-02 13:59:04,414 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:04,414 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:04,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:04,414 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:04,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:04,441 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:04,465 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:04,529 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:05,958 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:05,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:05,970 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:07,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2073#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a8~0.base_BEFORE_CALL_4| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_4| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_4|) 0))) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_4|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:07,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:07,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:07,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:59:07,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288635533] [2023-04-02 13:59:07,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:07,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:59:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:59:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:59:07,144 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:07,212 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2023-04-02 13:59:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:59:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-02 13:59:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:07,214 INFO L225 Difference]: With dead ends: 116 [2023-04-02 13:59:07,214 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 13:59:07,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:59:07,215 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:07,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 13:59:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-04-02 13:59:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2023-04-02 13:59:07,224 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 56 [2023-04-02 13:59:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:07,224 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2023-04-02 13:59:07,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2023-04-02 13:59:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 13:59:07,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:07,225 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:07,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 13:59:07,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:07,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:07,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2016600036, now seen corresponding path program 5 times [2023-04-02 13:59:07,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:07,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715566599] [2023-04-02 13:59:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-04-02 13:59:08,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715566599] [2023-04-02 13:59:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715566599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294105247] [2023-04-02 13:59:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:59:08,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:08,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:08,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:59:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:59:08,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:08,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:59:08,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-04-02 13:59:08,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-04-02 13:59:08,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294105247] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:08,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375017086] [2023-04-02 13:59:08,718 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:08,718 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:08,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:08,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:08,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:08,753 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:08,777 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:08,841 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:10,272 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:10,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:10,283 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:11,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2880#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_5| Int) (|v_main_~#a8~0.base_BEFORE_CALL_5| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0))) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_5| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_5|))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:11,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:11,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:11,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 13:59:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861309150] [2023-04-02 13:59:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:11,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 13:59:11,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 13:59:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:59:11,735 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:11,905 INFO L93 Difference]: Finished difference Result 159 states and 217 transitions. [2023-04-02 13:59:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 13:59:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 13:59:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:11,907 INFO L225 Difference]: With dead ends: 159 [2023-04-02 13:59:11,907 INFO L226 Difference]: Without dead ends: 115 [2023-04-02 13:59:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:59:11,908 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:59:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-04-02 13:59:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-04-02 13:59:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 109 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2023-04-02 13:59:11,915 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 68 [2023-04-02 13:59:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:11,915 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2023-04-02 13:59:11,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2023-04-02 13:59:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-02 13:59:11,916 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:11,916 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:11,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 13:59:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:12,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:12,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1275898075, now seen corresponding path program 6 times [2023-04-02 13:59:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800025333] [2023-04-02 13:59:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:12,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800025333] [2023-04-02 13:59:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800025333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667230687] [2023-04-02 13:59:12,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:12,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:12,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:12,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:59:13,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:13,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:59:13,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:13,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667230687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:13,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348908815] [2023-04-02 13:59:13,788 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:13,789 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:13,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:13,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:13,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:13,799 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:13,825 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:13,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:15,370 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:15,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:15,380 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:16,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4133#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a8~0.base_BEFORE_CALL_6| Int) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_6|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_6|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_6|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_6| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_6|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:16,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:16,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:59:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006875080] [2023-04-02 13:59:16,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:59:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:59:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:59:16,779 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:16,842 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2023-04-02 13:59:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:59:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-02 13:59:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:16,843 INFO L225 Difference]: With dead ends: 226 [2023-04-02 13:59:16,843 INFO L226 Difference]: Without dead ends: 140 [2023-04-02 13:59:16,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:59:16,846 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:16,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:59:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-02 13:59:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-04-02 13:59:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0671641791044777) internal successors, (143), 134 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2023-04-02 13:59:16,852 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 111 [2023-04-02 13:59:16,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:16,852 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2023-04-02 13:59:16,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2023-04-02 13:59:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 13:59:16,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:16,862 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:16,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:17,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:17,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:17,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1283509732, now seen corresponding path program 7 times [2023-04-02 13:59:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146005773] [2023-04-02 13:59:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:18,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:18,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146005773] [2023-04-02 13:59:18,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146005773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:18,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931311417] [2023-04-02 13:59:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:59:18,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:18,982 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:59:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:19,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 1522 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:59:19,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:19,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1561 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931311417] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487098542] [2023-04-02 13:59:21,774 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:21,774 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:21,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:21,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:21,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:21,808 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:21,834 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:21,898 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:23,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:23,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:23,360 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:24,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5770#(and (exists ((|v_main_~#a1~0.base_BEFORE_CALL_7| Int) (|v_main_~#a8~0.base_BEFORE_CALL_7| Int)) (and (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_7| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_7|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_7|))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:24,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:24,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:59:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177557626] [2023-04-02 13:59:24,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:59:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:59:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:59:24,937 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:25,095 INFO L93 Difference]: Finished difference Result 276 states and 341 transitions. [2023-04-02 13:59:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:59:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2023-04-02 13:59:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:25,097 INFO L225 Difference]: With dead ends: 276 [2023-04-02 13:59:25,097 INFO L226 Difference]: Without dead ends: 190 [2023-04-02 13:59:25,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:59:25,100 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:25,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-04-02 13:59:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2023-04-02 13:59:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.048913043478261) internal successors, (193), 184 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2023-04-02 13:59:25,109 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 136 [2023-04-02 13:59:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2023-04-02 13:59:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2023-04-02 13:59:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-02 13:59:25,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:25,111 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:25,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 13:59:25,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:25,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1725507012, now seen corresponding path program 8 times [2023-04-02 13:59:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189023391] [2023-04-02 13:59:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-04-02 13:59:30,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189023391] [2023-04-02 13:59:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189023391] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501517430] [2023-04-02 13:59:30,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:59:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:30,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:30,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:59:46,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:59:46,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:46,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:59:46,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2023-04-02 13:59:46,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5181 trivial. 0 not checked. [2023-04-02 13:59:47,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501517430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:47,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403793399] [2023-04-02 13:59:47,009 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 13:59:47,009 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:47,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:47,009 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:47,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:47,025 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:47,052 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:47,117 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 13:59:48,595 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:48,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:48,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:50,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7929#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a8~0.base_BEFORE_CALL_8| Int) (|v_main_~#a1~0.base_BEFORE_CALL_8| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_8| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_8|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_8|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:50,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:50,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:50,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 13:59:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077792896] [2023-04-02 13:59:50,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 13:59:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 13:59:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:50,743 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 123 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:51,164 INFO L93 Difference]: Finished difference Result 361 states and 461 transitions. [2023-04-02 13:59:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 13:59:51,164 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 123 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2023-04-02 13:59:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:51,166 INFO L225 Difference]: With dead ends: 361 [2023-04-02 13:59:51,166 INFO L226 Difference]: Without dead ends: 275 [2023-04-02 13:59:51,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:51,168 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:51,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:59:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-04-02 13:59:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2023-04-02 13:59:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.033457249070632) internal successors, (278), 269 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 13:59:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 283 transitions. [2023-04-02 13:59:51,176 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 283 transitions. Word has length 186 [2023-04-02 13:59:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:51,176 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 283 transitions. [2023-04-02 13:59:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 123 states have internal predecessors, (149), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 13:59:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 283 transitions. [2023-04-02 13:59:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-04-02 13:59:51,178 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:51,179 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:51,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:59:51,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:51,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1866151077, now seen corresponding path program 9 times [2023-04-02 13:59:51,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:51,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043712613] [2023-04-02 13:59:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 13:59:57,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043712613] [2023-04-02 13:59:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043712613] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:57,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765199483] [2023-04-02 13:59:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:57,102 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) [2023-04-02 13:59:57,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:59:57,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:57,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:57,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:59:57,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 13:59:58,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:00:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 14:00:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765199483] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:00:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493778074] [2023-04-02 14:00:04,087 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:00:04,087 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:00:04,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:00:04,088 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:00:04,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:00:04,099 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:00:04,138 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 14:00:04,210 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 14:00:05,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:00:05,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:00:05,765 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:00:07,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11018#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_9| Int) (|v_main_~#a8~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (not (= (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_9|) (<= 4 (+ |v_main_~#a8~0.base_BEFORE_CALL_9| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_9|) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:00:07,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:00:07,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:00:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 14:00:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787913195] [2023-04-02 14:00:07,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:00:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 14:00:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:00:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 14:00:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:00:07,965 INFO L87 Difference]: Start difference. First operand 275 states and 283 transitions. Second operand has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:00:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:00:08,251 INFO L93 Difference]: Finished difference Result 546 states and 662 transitions. [2023-04-02 14:00:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 14:00:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2023-04-02 14:00:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:00:08,253 INFO L225 Difference]: With dead ends: 546 [2023-04-02 14:00:08,253 INFO L226 Difference]: Without dead ends: 376 [2023-04-02 14:00:08,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:00:08,256 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:00:08,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:00:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-04-02 14:00:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-04-02 14:00:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 370 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:00:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 384 transitions. [2023-04-02 14:00:08,266 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 384 transitions. Word has length 271 [2023-04-02 14:00:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:00:08,267 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 384 transitions. [2023-04-02 14:00:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:00:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 384 transitions. [2023-04-02 14:00:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-04-02 14:00:08,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:00:08,270 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:00:08,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:00:08,481 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,SelfDestructingSolverStorable10 [2023-04-02 14:00:08,481 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:00:08,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:00:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1785413212, now seen corresponding path program 10 times [2023-04-02 14:00:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:00:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878572177] [2023-04-02 14:00:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:00:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:00:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:00:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 14:00:29,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:00:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878572177] [2023-04-02 14:00:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878572177] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:00:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951558870] [2023-04-02 14:00:29,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:00:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:00:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:00:29,609 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) [2023-04-02 14:00:29,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:00:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:00:30,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 4694 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 14:00:30,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:00:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 14:00:31,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:01:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21871 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 14:01:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951558870] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:01:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796919024] [2023-04-02 14:01:01,097 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:01:01,097 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:01:01,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:01:01,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:01:01,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:01:01,106 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:01:01,128 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 14:01:01,261 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-02 14:01:02,672 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:01:02,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:01:02,683 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:01:05,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15487#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_10| Int) (|v_main_~#a8~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |v_main_~#a8~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_10|) (not (= (select (select |#memory_int| |v_main_~#a8~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_10|) 0))) (<= 3 (+ |v_main_~#a8~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a8~0.base_BEFORE_CALL_10|) (<= 2 |v_main_~#a8~0.base_BEFORE_CALL_10|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:01:05,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:01:05,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:01:05,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:01:05,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533967781] [2023-04-02 14:01:05,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:01:05,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:01:05,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:01:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:01:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:01:05,632 INFO L87 Difference]: Start difference. First operand 376 states and 384 transitions. Second operand has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 405 states have internal predecessors, (425), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:01:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:01:07,060 INFO L93 Difference]: Finished difference Result 748 states and 965 transitions. [2023-04-02 14:01:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:01:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 405 states have internal predecessors, (425), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 372 [2023-04-02 14:01:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:01:07,062 INFO L225 Difference]: With dead ends: 748 [2023-04-02 14:01:07,062 INFO L226 Difference]: Without dead ends: 578 [2023-04-02 14:01:07,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:01:07,068 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:01:07,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:01:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-04-02 14:01:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2023-04-02 14:01:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 572 states have (on average 1.0157342657342658) internal successors, (581), 572 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:01:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 586 transitions. [2023-04-02 14:01:07,083 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 586 transitions. Word has length 372 [2023-04-02 14:01:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:01:07,083 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 586 transitions. [2023-04-02 14:01:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 405 states have internal predecessors, (425), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:01:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 586 transitions. [2023-04-02 14:01:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2023-04-02 14:01:07,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:01:07,086 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:01:07,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:01:07,301 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,SelfDestructingSolverStorable11 [2023-04-02 14:01:07,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:01:07,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:01:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1471933436, now seen corresponding path program 11 times [2023-04-02 14:01:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:01:07,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278253065] [2023-04-02 14:01:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:01:07,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:01:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 82774 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2023-04-02 14:02:23,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278253065] [2023-04-02 14:02:23,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278253065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:23,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502365855] [2023-04-02 14:02:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:23,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:24,015 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) [2023-04-02 14:02:24,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process