/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 EqDomain -i ../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:12:12,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:12:12,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:12:12,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:12:12,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:12:12,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:12:12,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:12:12,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:12:12,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:12:12,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:12:12,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:12:12,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:12:12,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:12:12,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:12:12,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:12:12,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:12:12,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:12:12,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:12:12,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:12:12,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:12:12,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:12:12,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:12:12,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:12:12,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:12:12,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:12:12,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:12:12,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:12:12,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:12:12,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:12:12,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:12:12,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:12:12,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:12:12,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:12:12,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:12:12,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:12:12,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:12:12,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:12:12,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:12:12,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:12:12,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:12:12,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:12:12,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:12:12,584 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:12:12,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:12:12,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:12:12,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:12:12,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:12:12,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:12:12,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:12:12,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:12:12,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:12:12,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:12:12,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:12:12,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:12:12,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:12:12,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:12:12,591 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:12:12,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:12:12,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:12:12,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:12:12,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:12:12,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:12:12,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:12:12,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:12:12,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:12:12,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:12:12,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:12:12,792 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:12:12,792 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:12:12,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2023-04-01 11:12:13,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:12:14,126 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:12:14,126 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2023-04-01 11:12:14,130 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d2903fa4/82c2e91ec0c84085894eeb24bbe24b02/FLAG0052d67e2 [2023-04-01 11:12:14,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d2903fa4/82c2e91ec0c84085894eeb24bbe24b02 [2023-04-01 11:12:14,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:12:14,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:12:14,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:12:14,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:12:14,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:12:14,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1f34f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14, skipping insertion in model container [2023-04-01 11:12:14,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:12:14,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:12:14,286 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2023-04-01 11:12:14,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:12:14,313 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:12:14,328 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2023-04-01 11:12:14,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:12:14,341 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:12:14,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14 WrapperNode [2023-04-01 11:12:14,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:12:14,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:12:14,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:12:14,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:12:14,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:12:14,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:12:14,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:12:14,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:12:14,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (1/1) ... [2023-04-01 11:12:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:12:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:14,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:12:14,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:12:14,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:12:14,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:12:14,466 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:12:14,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:12:14,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:12:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:12:14,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:12:14,516 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:12:14,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:12:14,609 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:12:14,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:12:14,621 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:12:14,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:12:14 BoogieIcfgContainer [2023-04-01 11:12:14,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:12:14,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:12:14,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:12:14,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:12:14,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:12:14" (1/3) ... [2023-04-01 11:12:14,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a18e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:12:14, skipping insertion in model container [2023-04-01 11:12:14,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:12:14" (2/3) ... [2023-04-01 11:12:14,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a18e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:12:14, skipping insertion in model container [2023-04-01 11:12:14,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:12:14" (3/3) ... [2023-04-01 11:12:14,628 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2023-04-01 11:12:14,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:12:14,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:12:14,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:12:14,675 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;@37f41d6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:12:14,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:12:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-04-01 11:12:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:12:14,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:14,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:14,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:14,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1357240066, now seen corresponding path program 1 times [2023-04-01 11:12:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298324469] [2023-04-01 11:12:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:14,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298324469] [2023-04-01 11:12:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298324469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:12:14,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:12:14,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:12:14,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573674078] [2023-04-01 11:12:14,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:12:14,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:12:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:12:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:12:14,933 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-01 11:12:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:14,975 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-04-01 11:12:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:12:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-01 11:12:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:14,980 INFO L225 Difference]: With dead ends: 32 [2023-04-01 11:12:14,981 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 11:12:14,982 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 [2023-04-01 11:12:14,984 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:12:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 11:12:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-01 11:12:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-01 11:12:15,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-01 11:12:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:15,011 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-01 11:12:15,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-01 11:12:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-01 11:12:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 11:12:15,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:15,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:15,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:12:15,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:15,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:15,014 INFO L85 PathProgramCache]: Analyzing trace with hash 51745214, now seen corresponding path program 1 times [2023-04-01 11:12:15,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:15,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651269256] [2023-04-01 11:12:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:15,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:15,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651269256] [2023-04-01 11:12:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651269256] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717552253] [2023-04-01 11:12:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:15,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:15,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:15,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:12:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:15,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:12:15,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:15,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:15,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717552253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:15,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035578226] [2023-04-01 11:12:15,226 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:15,226 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:15,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:15,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:15,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:15,343 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:15,451 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:15,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:15,486 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:15,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:15,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:15,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:15,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-04-01 11:12:15,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604991520] [2023-04-01 11:12:15,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:15,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:12:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:12:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:12:15,862 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-04-01 11:12:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:15,878 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-04-01 11:12:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:12:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 12 [2023-04-01 11:12:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:15,879 INFO L225 Difference]: With dead ends: 21 [2023-04-01 11:12:15,879 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 11:12:15,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:12:15,883 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:12:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 11:12:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 11:12:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-04-01 11:12:15,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2023-04-01 11:12:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:15,891 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-04-01 11:12:15,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-04-01 11:12:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-04-01 11:12:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:12:15,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:15,892 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:15,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:12:16,098 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 [2023-04-01 11:12:16,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:16,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2029102850, now seen corresponding path program 2 times [2023-04-01 11:12:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:16,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662641919] [2023-04-01 11:12:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:16,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:16,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662641919] [2023-04-01 11:12:16,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662641919] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750428955] [2023-04-01 11:12:16,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:12:16,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:16,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:16,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:12:16,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:12:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:12:16,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:12:16,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:16,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750428955] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135581327] [2023-04-01 11:12:16,339 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:16,340 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:16,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:16,340 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:16,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:16,391 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:16,494 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:16,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:16,511 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:16,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:16,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:16,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:16,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-01 11:12:16,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212438052] [2023-04-01 11:12:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:16,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:12:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:12:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:12:16,830 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2023-04-01 11:12:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:16,857 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-04-01 11:12:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:12:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 15 [2023-04-01 11:12:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:16,858 INFO L225 Difference]: With dead ends: 27 [2023-04-01 11:12:16,858 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:12:16,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:12:16,861 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:16,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:12:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:12:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 11:12:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-01 11:12:16,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 15 [2023-04-01 11:12:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:16,864 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-01 11:12:16,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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) [2023-04-01 11:12:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-01 11:12:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:12:16,865 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:16,865 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:16,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:12:17,069 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 [2023-04-01 11:12:17,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:17,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 373268734, now seen corresponding path program 3 times [2023-04-01 11:12:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123904724] [2023-04-01 11:12:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:17,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:17,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:17,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123904724] [2023-04-01 11:12:17,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123904724] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691292007] [2023-04-01 11:12:17,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:12:17,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:17,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:17,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:17,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:12:17,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:12:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:12:17,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:12:17,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:17,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:17,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691292007] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918821749] [2023-04-01 11:12:17,505 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:17,505 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:17,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:17,506 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:17,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:17,537 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:17,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:17,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:17,600 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:17,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '572#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:17,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:17,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:17,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 11:12:17,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808244839] [2023-04-01 11:12:17,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:17,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 11:12:17,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 11:12:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:12:17,936 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-04-01 11:12:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:17,962 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-04-01 11:12:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:12:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 21 [2023-04-01 11:12:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:17,963 INFO L225 Difference]: With dead ends: 39 [2023-04-01 11:12:17,963 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:12:17,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:12:17,964 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:17,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:12:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:12:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:12:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2023-04-01 11:12:17,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2023-04-01 11:12:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:17,968 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2023-04-01 11:12:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-04-01 11:12:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2023-04-01 11:12:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:12:17,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:17,968 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:17,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:12:18,186 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 [2023-04-01 11:12:18,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:18,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1528811266, now seen corresponding path program 4 times [2023-04-01 11:12:18,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:18,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763447415] [2023-04-01 11:12:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:18,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763447415] [2023-04-01 11:12:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763447415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969461232] [2023-04-01 11:12:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:12:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:18,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:18,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:12:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:18,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:12:18,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:18,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969461232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617944107] [2023-04-01 11:12:19,132 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:19,132 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:19,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:19,132 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:19,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:19,173 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:19,230 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:19,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:19,239 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:19,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '957#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:19,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:19,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:19,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 11:12:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142823270] [2023-04-01 11:12:19,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:19,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 11:12:19,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:19,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 11:12:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=1991, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 11:12:19,581 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2023-04-01 11:12:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:19,636 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2023-04-01 11:12:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 11:12:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 33 [2023-04-01 11:12:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:19,637 INFO L225 Difference]: With dead ends: 63 [2023-04-01 11:12:19,637 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 11:12:19,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1201, Invalid=1991, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 11:12:19,639 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:19,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:12:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 11:12:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-01 11:12:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2023-04-01 11:12:19,651 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 33 [2023-04-01 11:12:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:19,651 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2023-04-01 11:12:19,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2023-04-01 11:12:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2023-04-01 11:12:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 11:12:19,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:19,652 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:19,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:12:19,855 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 [2023-04-01 11:12:19,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:19,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash -786870018, now seen corresponding path program 5 times [2023-04-01 11:12:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677014658] [2023-04-01 11:12:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:20,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677014658] [2023-04-01 11:12:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677014658] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:20,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627011303] [2023-04-01 11:12:20,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:12:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:20,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:20,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:12:20,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 11:12:20,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:12:20,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 11:12:20,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:21,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627011303] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:22,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263390249] [2023-04-01 11:12:22,810 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:22,810 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:22,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:22,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:22,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:22,842 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:22,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:22,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:22,916 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:23,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1630#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:23,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:23,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:23,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-01 11:12:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797340144] [2023-04-01 11:12:23,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:23,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-01 11:12:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-01 11:12:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4681, Invalid=6239, Unknown=0, NotChecked=0, Total=10920 [2023-04-01 11:12:23,346 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2023-04-01 11:12:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:23,443 INFO L93 Difference]: Finished difference Result 111 states and 158 transitions. [2023-04-01 11:12:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-01 11:12:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 57 [2023-04-01 11:12:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:23,444 INFO L225 Difference]: With dead ends: 111 [2023-04-01 11:12:23,444 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 11:12:23,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4681, Invalid=6239, Unknown=0, NotChecked=0, Total=10920 [2023-04-01 11:12:23,447 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:23,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:12:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 11:12:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 11:12:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2023-04-01 11:12:23,453 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 57 [2023-04-01 11:12:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:23,453 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2023-04-01 11:12:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2023-04-01 11:12:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2023-04-01 11:12:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 11:12:23,455 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:23,455 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:23,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:12:23,660 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 [2023-04-01 11:12:23,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:23,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash -714370818, now seen corresponding path program 6 times [2023-04-01 11:12:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:23,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851606569] [2023-04-01 11:12:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:27,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:27,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851606569] [2023-04-01 11:12:27,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851606569] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:27,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364291641] [2023-04-01 11:12:27,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:12:27,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:27,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:12:27,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:12:27,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:12:27,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 11:12:27,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:27,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364291641] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398055338] [2023-04-01 11:12:29,891 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:29,891 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:29,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:29,891 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:29,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:29,932 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:29,982 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:29,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:29,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:30,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2788#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:30,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:30,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:30,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 102 [2023-04-01 11:12:30,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280272556] [2023-04-01 11:12:30,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:30,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 11:12:30,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 11:12:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5176, Invalid=6814, Unknown=0, NotChecked=0, Total=11990 [2023-04-01 11:12:30,619 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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) [2023-04-01 11:12:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:30,714 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2023-04-01 11:12:30,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-04-01 11:12:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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 105 [2023-04-01 11:12:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:30,715 INFO L225 Difference]: With dead ends: 117 [2023-04-01 11:12:30,715 INFO L226 Difference]: Without dead ends: 112 [2023-04-01 11:12:30,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 213 SyntacticMatches, 90 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5176, Invalid=6814, Unknown=0, NotChecked=0, Total=11990 [2023-04-01 11:12:30,718 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:30,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:12:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-04-01 11:12:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-04-01 11:12:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2023-04-01 11:12:30,725 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 105 [2023-04-01 11:12:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:30,725 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2023-04-01 11:12:30,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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) [2023-04-01 11:12:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2023-04-01 11:12:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 11:12:30,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:30,726 INFO L195 NwaCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:30,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:12:30,932 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 [2023-04-01 11:12:30,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:30,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash -942483202, now seen corresponding path program 7 times [2023-04-01 11:12:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:30,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876930489] [2023-04-01 11:12:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:30,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:35,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876930489] [2023-04-01 11:12:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876930489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:12:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794607596] [2023-04-01 11:12:35,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:12:35,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:12:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:12:35,849 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:12:35,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:12:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:35,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 208 conjunts are in the unsatisfiable core [2023-04-01 11:12:35,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:12:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:36,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:12:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:36,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794607596] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:12:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23909961] [2023-04-01 11:12:36,829 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 11:12:36,829 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:12:36,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:12:36,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:12:36,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:12:36,844 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 37 for LOIs [2023-04-01 11:12:36,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-04-01 11:12:36,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:12:36,897 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:12:37,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4011#(and (= 26 (select |#length| 2)) (= 2 (select |#length| 1)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:12:37,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:12:37,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:12:37,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 107 [2023-04-01 11:12:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127564415] [2023-04-01 11:12:37,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:12:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-01 11:12:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-01 11:12:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=12872, Unknown=0, NotChecked=0, Total=13110 [2023-04-01 11:12:37,976 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:41,230 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2023-04-01 11:12:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-01 11:12:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2023-04-01 11:12:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:41,232 INFO L225 Difference]: With dead ends: 118 [2023-04-01 11:12:41,232 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 11:12:41,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 320 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=244, Invalid=13096, Unknown=0, NotChecked=0, Total=13340 [2023-04-01 11:12:41,233 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 11126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 11126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:41,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 533 Invalid, 11126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11126 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 11:12:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 11:12:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-04-01 11:12:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2023-04-01 11:12:41,240 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2023-04-01 11:12:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:41,240 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2023-04-01 11:12:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 105 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:12:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2023-04-01 11:12:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 11:12:41,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:12:41,242 INFO L195 NwaCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:12:41,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 11:12:41,447 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 [2023-04-01 11:12:41,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:12:41,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:12:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash 24306110, now seen corresponding path program 8 times [2023-04-01 11:12:41,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:12:41,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55551161] [2023-04-01 11:12:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:12:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:12:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:12:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:12:45,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:12:45,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55551161] [2023-04-01 11:12:45,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55551161] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:12:45,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:12:45,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2023-04-01 11:12:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858966789] [2023-04-01 11:12:45,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:12:45,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-04-01 11:12:45,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:12:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-04-01 11:12:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 11:12:45,277 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 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) [2023-04-01 11:12:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:12:45,496 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2023-04-01 11:12:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-04-01 11:12:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 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 112 [2023-04-01 11:12:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:12:45,498 INFO L225 Difference]: With dead ends: 113 [2023-04-01 11:12:45,498 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 11:12:45,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2023-04-01 11:12:45,501 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:12:45,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:12:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 11:12:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 11:12:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 11:12:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 11:12:45,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2023-04-01 11:12:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:12:45,503 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 11:12:45,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 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) [2023-04-01 11:12:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 11:12:45,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 11:12:45,505 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 11:12:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 11:12:45,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 11:12:46,734 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2023-04-01 11:12:46,734 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 11) no Hoare annotation was computed. [2023-04-01 11:12:46,734 INFO L899 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2023-04-01 11:12:46,734 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 19 29) no Hoare annotation was computed. [2023-04-01 11:12:46,734 INFO L899 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2023-04-01 11:12:46,738 INFO L895 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= main_~j~0 190) (<= 190 main_~j~0) (<= 95 main_~i~0) (< main_~i~0 96)) (and (<= 38 main_~i~0) (<= 76 main_~j~0) (<= main_~i~0 38) (<= main_~j~0 76)) (and (<= main_~j~0 88) (<= 88 main_~j~0) (<= 44 main_~i~0) (<= main_~i~0 44)) (and (<= main_~j~0 130) (<= 130 main_~j~0) (<= 65 main_~i~0) (<= main_~i~0 65)) (and (<= main_~i~0 53) (<= 53 main_~i~0) (<= 106 main_~j~0) (<= main_~j~0 106)) (and (<= 86 main_~i~0) (<= main_~i~0 86) (<= 172 main_~j~0) (<= main_~j~0 172)) (and (<= main_~i~0 93) (<= 93 main_~i~0) (<= 186 main_~j~0) (<= main_~j~0 186)) (and (<= main_~j~0 72) (<= 72 main_~j~0) (<= 36 main_~i~0) (<= main_~i~0 36)) (and (<= main_~j~0 12) (<= 12 main_~j~0) (<= main_~i~0 6) (<= 6 main_~i~0)) (and (<= 134 main_~j~0) (<= 67 main_~i~0) (<= main_~i~0 67) (<= main_~j~0 134)) (and (<= 90 main_~i~0) (<= main_~j~0 180) (<= main_~i~0 90) (<= 180 main_~j~0)) (and (<= 148 main_~j~0) (<= main_~j~0 148) (<= 74 main_~i~0) (<= main_~i~0 74)) (and (<= 39 main_~i~0) (<= 78 main_~j~0) (<= main_~i~0 39) (<= main_~j~0 78)) (and (<= 23 main_~i~0) (<= main_~i~0 23) (<= 46 main_~j~0) (<= main_~j~0 46)) (and (<= 22 main_~j~0) (<= 11 main_~i~0) (<= main_~j~0 22) (<= main_~i~0 11)) (and (<= 77 main_~i~0) (<= main_~i~0 77) (<= 154 main_~j~0) (<= main_~j~0 154)) (and (<= 136 main_~j~0) (<= main_~j~0 136) (<= 68 main_~i~0) (<= main_~i~0 68)) (and (<= 97 main_~i~0) (<= main_~j~0 194) (< main_~i~0 98) (<= 194 main_~j~0)) (and (<= 132 main_~j~0) (<= main_~i~0 66) (<= main_~j~0 132) (<= 66 main_~i~0)) (and (<= 100 main_~i~0) (<= main_~j~0 200) (< 199 main_~j~0)) (and (<= 68 main_~j~0) (<= main_~j~0 68) (<= main_~i~0 34) (<= 34 main_~i~0)) (and (<= main_~j~0 92) (<= 46 main_~i~0) (<= main_~i~0 46) (<= 92 main_~j~0)) (and (<= 37 main_~i~0) (<= main_~i~0 37) (<= main_~j~0 74) (<= 74 main_~j~0)) (and (<= 20 main_~i~0) (<= main_~j~0 40) (<= 40 main_~j~0) (<= main_~i~0 20)) (and (<= 98 main_~i~0) (<= 196 main_~j~0) (< main_~i~0 99) (<= main_~j~0 196)) (and (<= main_~j~0 162) (<= main_~i~0 81) (<= 162 main_~j~0) (<= 81 main_~i~0)) (and (<= 52 main_~i~0) (<= main_~i~0 52) (<= main_~j~0 104) (<= 104 main_~j~0)) (and (<= 12 main_~i~0) (<= main_~j~0 24) (<= main_~i~0 12) (<= 24 main_~j~0)) (and (<= 31 main_~i~0) (<= main_~i~0 31) (<= main_~j~0 62) (<= 62 main_~j~0)) (and (<= main_~j~0 56) (<= main_~i~0 28) (<= 28 main_~i~0) (<= 56 main_~j~0)) (and (<= main_~j~0 90) (<= 90 main_~j~0) (<= 45 main_~i~0) (<= main_~i~0 45)) (and (<= main_~i~0 63) (<= main_~j~0 126) (<= 126 main_~j~0) (<= 63 main_~i~0)) (and (<= main_~i~0 79) (<= 158 main_~j~0) (<= main_~j~0 158) (<= 79 main_~i~0)) (and (<= 78 main_~i~0) (<= 156 main_~j~0) (<= main_~i~0 78) (<= main_~j~0 156)) (and (<= main_~j~0 100) (<= 100 main_~j~0) (<= main_~i~0 50) (<= 50 main_~i~0)) (and (<= 96 main_~j~0) (<= 48 main_~i~0) (<= main_~j~0 96) (<= main_~i~0 48)) (and (<= main_~j~0 44) (<= 22 main_~i~0) (<= main_~i~0 22) (<= 44 main_~j~0)) (and (<= main_~i~0 59) (<= 59 main_~i~0) (<= 118 main_~j~0) (<= main_~j~0 118)) (and (<= 150 main_~j~0) (<= main_~j~0 150) (<= main_~i~0 75) (<= 75 main_~i~0)) (and (<= 58 main_~j~0) (<= main_~j~0 58) (<= main_~i~0 29) (<= 29 main_~i~0)) (and (<= main_~i~0 16) (<= main_~j~0 32) (<= 16 main_~i~0) (<= 32 main_~j~0)) (and (<= 89 main_~i~0) (<= 178 main_~j~0) (<= main_~j~0 178) (<= main_~i~0 89)) (and (<= 30 main_~i~0) (<= main_~i~0 30) (<= main_~j~0 60) (<= 60 main_~j~0)) (and (<= 15 main_~i~0) (<= main_~j~0 30) (<= main_~i~0 15) (<= 30 main_~j~0)) (and (<= 33 main_~i~0) (<= main_~j~0 66) (<= 66 main_~j~0) (<= main_~i~0 33)) (and (<= main_~i~0 64) (<= main_~j~0 128) (<= 64 main_~i~0) (<= 128 main_~j~0)) (and (<= main_~j~0 8) (<= main_~i~0 4) (<= 8 main_~j~0) (<= 4 main_~i~0)) (and (<= 9 main_~i~0) (<= 18 main_~j~0) (<= main_~i~0 9) (<= main_~j~0 18)) (and (<= main_~i~0 56) (<= 56 main_~i~0) (<= main_~j~0 112) (<= 112 main_~j~0)) (and (<= main_~j~0 10) (<= 10 main_~j~0) (<= main_~i~0 5) (<= 5 main_~i~0)) (and (<= main_~j~0 144) (<= main_~i~0 72) (<= 72 main_~i~0) (<= 144 main_~j~0)) (and (<= main_~i~0 49) (<= 49 main_~i~0) (<= 98 main_~j~0) (<= main_~j~0 98)) (and (<= main_~j~0 52) (<= 52 main_~j~0) (<= main_~i~0 26) (<= 26 main_~i~0)) (and (<= 2 main_~i~0) (<= 4 main_~j~0) (<= main_~j~0 4) (<= main_~i~0 2)) (and (<= main_~i~0 92) (<= 184 main_~j~0) (<= main_~j~0 184) (<= 92 main_~i~0)) (and (<= main_~i~0 60) (<= 120 main_~j~0) (<= main_~j~0 120) (<= 60 main_~i~0)) (and (<= 138 main_~j~0) (<= main_~j~0 138) (<= 69 main_~i~0) (<= main_~i~0 69)) (and (<= 19 main_~i~0) (<= main_~j~0 38) (<= main_~i~0 19) (<= 38 main_~j~0)) (and (<= 58 main_~i~0) (<= main_~j~0 116) (<= 116 main_~j~0) (<= main_~i~0 58)) (and (<= 80 main_~i~0) (<= main_~i~0 80) (<= 160 main_~j~0) (<= main_~j~0 160)) (and (<= 114 main_~j~0) (<= main_~j~0 114) (<= main_~i~0 57) (<= 57 main_~i~0)) (and (<= 94 main_~i~0) (<= 188 main_~j~0) (<= main_~j~0 188) (<= main_~i~0 94)) (and (<= 108 main_~j~0) (<= main_~i~0 54) (<= main_~j~0 108) (<= 54 main_~i~0)) (and (<= 51 main_~i~0) (<= main_~i~0 51) (<= 102 main_~j~0) (<= main_~j~0 102)) (and (<= 164 main_~j~0) (<= main_~j~0 164) (<= 82 main_~i~0) (<= main_~i~0 82)) (and (<= 70 main_~j~0) (<= 35 main_~i~0) (<= main_~j~0 70) (<= main_~i~0 35)) (and (<= 64 main_~j~0) (<= main_~i~0 32) (<= main_~j~0 64) (<= 32 main_~i~0)) (and (<= 87 main_~i~0) (<= 174 main_~j~0) (<= main_~j~0 174) (<= main_~i~0 87)) (and (<= main_~i~0 76) (<= 152 main_~j~0) (<= main_~j~0 152) (<= 76 main_~i~0)) (and (<= main_~j~0 2) (<= main_~i~0 1) (<= 2 main_~j~0) (<= 1 main_~i~0)) (and (<= 83 main_~i~0) (<= main_~j~0 166) (<= main_~i~0 83) (<= 166 main_~j~0)) (and (<= main_~i~0 10) (<= 20 main_~j~0) (<= 10 main_~i~0) (<= main_~j~0 20)) (and (<= main_~i~0 41) (<= 82 main_~j~0) (<= 41 main_~i~0) (<= main_~j~0 82)) (and (<= main_~j~0 36) (<= main_~i~0 18) (<= 18 main_~i~0) (<= 36 main_~j~0)) (and (<= main_~i~0 27) (<= 54 main_~j~0) (<= main_~j~0 54) (<= 27 main_~i~0)) (and (<= 50 main_~j~0) (<= 25 main_~i~0) (<= main_~j~0 50) (<= main_~i~0 25)) (and (<= 0 main_~j~0) (= main_~i~0 0) (<= main_~j~0 0)) (and (<= main_~j~0 86) (<= 86 main_~j~0) (<= main_~i~0 43) (<= 43 main_~i~0)) (and (<= 62 main_~i~0) (<= 124 main_~j~0) (<= main_~i~0 62) (<= main_~j~0 124)) (and (<= main_~j~0 142) (<= 142 main_~j~0) (<= main_~i~0 71) (<= 71 main_~i~0)) (and (<= 42 main_~i~0) (<= main_~i~0 42) (<= 84 main_~j~0) (<= main_~j~0 84)) (and (<= main_~j~0 192) (< main_~i~0 97) (<= 96 main_~i~0) (<= 192 main_~j~0)) (and (<= 14 main_~j~0) (<= main_~i~0 7) (<= main_~j~0 14) (<= 7 main_~i~0)) (and (<= main_~j~0 6) (<= 6 main_~j~0) (<= 3 main_~i~0) (<= main_~i~0 3)) (and (<= main_~j~0 34) (<= 17 main_~i~0) (<= main_~i~0 17) (<= 34 main_~j~0)) (and (<= 40 main_~i~0) (<= 80 main_~j~0) (<= main_~i~0 40) (<= main_~j~0 80)) (and (<= main_~i~0 14) (<= 14 main_~i~0) (<= main_~j~0 28) (<= 28 main_~j~0)) (and (<= 88 main_~i~0) (<= 176 main_~j~0) (<= main_~j~0 176) (<= main_~i~0 88)) (and (<= main_~i~0 70) (<= 70 main_~i~0) (<= main_~j~0 140) (<= 140 main_~j~0)) (and (<= 182 main_~j~0) (<= main_~i~0 91) (<= 91 main_~i~0) (<= main_~j~0 182)) (and (<= 24 main_~i~0) (<= main_~j~0 48) (<= main_~i~0 24) (<= 48 main_~j~0)) (and (<= main_~j~0 146) (<= 146 main_~j~0) (<= main_~i~0 73) (<= 73 main_~i~0)) (and (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~j~0 16) (<= 16 main_~j~0)) (and (<= 42 main_~j~0) (<= main_~j~0 42) (<= main_~i~0 21) (<= 21 main_~i~0)) (and (<= main_~j~0 198) (< main_~i~0 100) (<= 99 main_~i~0) (<= 198 main_~j~0)) (and (<= main_~j~0 122) (<= 61 main_~i~0) (<= main_~i~0 61) (<= 122 main_~j~0)) (and (<= main_~i~0 84) (<= 168 main_~j~0) (<= 84 main_~i~0) (<= main_~j~0 168)) (and (<= main_~j~0 110) (<= 110 main_~j~0) (<= main_~i~0 55) (<= 55 main_~i~0)) (and (<= main_~i~0 47) (<= main_~j~0 94) (<= 94 main_~j~0) (<= 47 main_~i~0)) (and (<= 170 main_~j~0) (<= 85 main_~i~0) (<= main_~i~0 85) (<= main_~j~0 170)) (and (<= main_~i~0 13) (<= 13 main_~i~0) (<= main_~j~0 26) (<= 26 main_~j~0))) [2023-04-01 11:12:46,738 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 26) the Hoare annotation is: (and (<= main_~j~0 200) (< 199 main_~j~0)) [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 19 29) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 29) the Hoare annotation is: true [2023-04-01 11:12:46,739 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 18) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 18) no Hoare annotation was computed. [2023-04-01 11:12:46,739 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 18) the Hoare annotation is: true [2023-04-01 11:12:46,739 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2023-04-01 11:12:46,742 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1] [2023-04-01 11:12:46,743 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 11:12:46,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 11:12:46 BoogieIcfgContainer [2023-04-01 11:12:46,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 11:12:46,789 INFO L158 Benchmark]: Toolchain (without parser) took 32640.02ms. Allocated memory was 237.0MB in the beginning and 502.3MB in the end (delta: 265.3MB). Free memory was 196.3MB in the beginning and 402.1MB in the end (delta: -205.8MB). Peak memory consumption was 300.2MB. Max. memory is 8.0GB. [2023-04-01 11:12:46,789 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory was 143.0MB in the beginning and 142.9MB in the end (delta: 160.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:12:46,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.65ms. Allocated memory is still 237.0MB. Free memory was 195.8MB in the beginning and 185.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-01 11:12:46,789 INFO L158 Benchmark]: Boogie Preprocessor took 34.26ms. Allocated memory is still 237.0MB. Free memory was 185.9MB in the beginning and 184.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 11:12:46,790 INFO L158 Benchmark]: RCFGBuilder took 244.87ms. Allocated memory is still 237.0MB. Free memory was 184.8MB in the beginning and 173.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 11:12:46,790 INFO L158 Benchmark]: TraceAbstraction took 32152.29ms. Allocated memory was 237.0MB in the beginning and 502.3MB in the end (delta: 265.3MB). Free memory was 172.8MB in the beginning and 402.1MB in the end (delta: -229.4MB). Peak memory consumption was 276.0MB. Max. memory is 8.0GB. [2023-04-01 11:12:46,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 197.1MB. Free memory was 143.0MB in the beginning and 142.9MB in the end (delta: 160.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.65ms. Allocated memory is still 237.0MB. Free memory was 195.8MB in the beginning and 185.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.26ms. Allocated memory is still 237.0MB. Free memory was 185.9MB in the beginning and 184.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 244.87ms. Allocated memory is still 237.0MB. Free memory was 184.8MB in the beginning and 173.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 32152.29ms. Allocated memory was 237.0MB in the beginning and 502.3MB in the end (delta: 265.3MB). Free memory was 172.8MB in the beginning and 402.1MB in the end (delta: -229.4MB). Peak memory consumption was 276.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.1s, OverallIterations: 9, TraceHistogramMax: 101, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1 mSDsluCounter, 807 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 723 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12001 IncrementalHoareTripleChecker+Invalid, 12006 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 84 mSDtfsCounter, 12001 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1462 GetRequests, 825 SyntacticMatches, 94 SemanticMatches, 543 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7720 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=8, InterpolantAutomatonStates: 499, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 117 NumberOfFragments, 1320 HoareAnnotationTreeSize, 15 FomulaSimplifications, 270 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 831 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1162 ConstructedInterpolants, 0 QuantifiedInterpolants, 4316 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1763 ConjunctsInSsa, 397 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/37896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((j <= 190 && 190 <= j) && 95 <= i) && i < 96) || (((38 <= i && 76 <= j) && i <= 38) && j <= 76)) || (((j <= 88 && 88 <= j) && 44 <= i) && i <= 44)) || (((j <= 130 && 130 <= j) && 65 <= i) && i <= 65)) || (((i <= 53 && 53 <= i) && 106 <= j) && j <= 106)) || (((86 <= i && i <= 86) && 172 <= j) && j <= 172)) || (((i <= 93 && 93 <= i) && 186 <= j) && j <= 186)) || (((j <= 72 && 72 <= j) && 36 <= i) && i <= 36)) || (((j <= 12 && 12 <= j) && i <= 6) && 6 <= i)) || (((134 <= j && 67 <= i) && i <= 67) && j <= 134)) || (((90 <= i && j <= 180) && i <= 90) && 180 <= j)) || (((148 <= j && j <= 148) && 74 <= i) && i <= 74)) || (((39 <= i && 78 <= j) && i <= 39) && j <= 78)) || (((23 <= i && i <= 23) && 46 <= j) && j <= 46)) || (((22 <= j && 11 <= i) && j <= 22) && i <= 11)) || (((77 <= i && i <= 77) && 154 <= j) && j <= 154)) || (((136 <= j && j <= 136) && 68 <= i) && i <= 68)) || (((97 <= i && j <= 194) && i < 98) && 194 <= j)) || (((132 <= j && i <= 66) && j <= 132) && 66 <= i)) || ((100 <= i && j <= 200) && 199 < j)) || (((68 <= j && j <= 68) && i <= 34) && 34 <= i)) || (((j <= 92 && 46 <= i) && i <= 46) && 92 <= j)) || (((37 <= i && i <= 37) && j <= 74) && 74 <= j)) || (((20 <= i && j <= 40) && 40 <= j) && i <= 20)) || (((98 <= i && 196 <= j) && i < 99) && j <= 196)) || (((j <= 162 && i <= 81) && 162 <= j) && 81 <= i)) || (((52 <= i && i <= 52) && j <= 104) && 104 <= j)) || (((12 <= i && j <= 24) && i <= 12) && 24 <= j)) || (((31 <= i && i <= 31) && j <= 62) && 62 <= j)) || (((j <= 56 && i <= 28) && 28 <= i) && 56 <= j)) || (((j <= 90 && 90 <= j) && 45 <= i) && i <= 45)) || (((i <= 63 && j <= 126) && 126 <= j) && 63 <= i)) || (((i <= 79 && 158 <= j) && j <= 158) && 79 <= i)) || (((78 <= i && 156 <= j) && i <= 78) && j <= 156)) || (((j <= 100 && 100 <= j) && i <= 50) && 50 <= i)) || (((96 <= j && 48 <= i) && j <= 96) && i <= 48)) || (((j <= 44 && 22 <= i) && i <= 22) && 44 <= j)) || (((i <= 59 && 59 <= i) && 118 <= j) && j <= 118)) || (((150 <= j && j <= 150) && i <= 75) && 75 <= i)) || (((58 <= j && j <= 58) && i <= 29) && 29 <= i)) || (((i <= 16 && j <= 32) && 16 <= i) && 32 <= j)) || (((89 <= i && 178 <= j) && j <= 178) && i <= 89)) || (((30 <= i && i <= 30) && j <= 60) && 60 <= j)) || (((15 <= i && j <= 30) && i <= 15) && 30 <= j)) || (((33 <= i && j <= 66) && 66 <= j) && i <= 33)) || (((i <= 64 && j <= 128) && 64 <= i) && 128 <= j)) || (((j <= 8 && i <= 4) && 8 <= j) && 4 <= i)) || (((9 <= i && 18 <= j) && i <= 9) && j <= 18)) || (((i <= 56 && 56 <= i) && j <= 112) && 112 <= j)) || (((j <= 10 && 10 <= j) && i <= 5) && 5 <= i)) || (((j <= 144 && i <= 72) && 72 <= i) && 144 <= j)) || (((i <= 49 && 49 <= i) && 98 <= j) && j <= 98)) || (((j <= 52 && 52 <= j) && i <= 26) && 26 <= i)) || (((2 <= i && 4 <= j) && j <= 4) && i <= 2)) || (((i <= 92 && 184 <= j) && j <= 184) && 92 <= i)) || (((i <= 60 && 120 <= j) && j <= 120) && 60 <= i)) || (((138 <= j && j <= 138) && 69 <= i) && i <= 69)) || (((19 <= i && j <= 38) && i <= 19) && 38 <= j)) || (((58 <= i && j <= 116) && 116 <= j) && i <= 58)) || (((80 <= i && i <= 80) && 160 <= j) && j <= 160)) || (((114 <= j && j <= 114) && i <= 57) && 57 <= i)) || (((94 <= i && 188 <= j) && j <= 188) && i <= 94)) || (((108 <= j && i <= 54) && j <= 108) && 54 <= i)) || (((51 <= i && i <= 51) && 102 <= j) && j <= 102)) || (((164 <= j && j <= 164) && 82 <= i) && i <= 82)) || (((70 <= j && 35 <= i) && j <= 70) && i <= 35)) || (((64 <= j && i <= 32) && j <= 64) && 32 <= i)) || (((87 <= i && 174 <= j) && j <= 174) && i <= 87)) || (((i <= 76 && 152 <= j) && j <= 152) && 76 <= i)) || (((j <= 2 && i <= 1) && 2 <= j) && 1 <= i)) || (((83 <= i && j <= 166) && i <= 83) && 166 <= j)) || (((i <= 10 && 20 <= j) && 10 <= i) && j <= 20)) || (((i <= 41 && 82 <= j) && 41 <= i) && j <= 82)) || (((j <= 36 && i <= 18) && 18 <= i) && 36 <= j)) || (((i <= 27 && 54 <= j) && j <= 54) && 27 <= i)) || (((50 <= j && 25 <= i) && j <= 50) && i <= 25)) || ((0 <= j && i == 0) && j <= 0)) || (((j <= 86 && 86 <= j) && i <= 43) && 43 <= i)) || (((62 <= i && 124 <= j) && i <= 62) && j <= 124)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((42 <= i && i <= 42) && 84 <= j) && j <= 84)) || (((j <= 192 && i < 97) && 96 <= i) && 192 <= j)) || (((14 <= j && i <= 7) && j <= 14) && 7 <= i)) || (((j <= 6 && 6 <= j) && 3 <= i) && i <= 3)) || (((j <= 34 && 17 <= i) && i <= 17) && 34 <= j)) || (((40 <= i && 80 <= j) && i <= 40) && j <= 80)) || (((i <= 14 && 14 <= i) && j <= 28) && 28 <= j)) || (((88 <= i && 176 <= j) && j <= 176) && i <= 88)) || (((i <= 70 && 70 <= i) && j <= 140) && 140 <= j)) || (((182 <= j && i <= 91) && 91 <= i) && j <= 182)) || (((24 <= i && j <= 48) && i <= 24) && 48 <= j)) || (((j <= 146 && 146 <= j) && i <= 73) && 73 <= i)) || (((8 <= i && i <= 8) && j <= 16) && 16 <= j)) || (((42 <= j && j <= 42) && i <= 21) && 21 <= i)) || (((j <= 198 && i < 100) && 99 <= i) && 198 <= j)) || (((j <= 122 && 61 <= i) && i <= 61) && 122 <= j)) || (((i <= 84 && 168 <= j) && 84 <= i) && j <= 168)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((i <= 47 && j <= 94) && 94 <= j) && 47 <= i)) || (((170 <= j && 85 <= i) && i <= 85) && j <= 170)) || (((i <= 13 && 13 <= i) && j <= 26) && 26 <= j) RESULT: Ultimate proved your program to be correct! [2023-04-01 11:12:46,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...