/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:29:37,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:29:37,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:29:37,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:29:37,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:29:37,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:29:37,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:29:37,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:29:37,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:29:37,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:29:37,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:29:37,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:29:37,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:29:37,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:29:37,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:29:37,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:29:37,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:29:37,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:29:37,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:29:37,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:29:37,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:29:37,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:29:37,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:29:37,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:29:37,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:29:37,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:29:37,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:29:37,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:29:37,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:29:37,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:29:37,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:29:37,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:29:37,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:29:37,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:29:37,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:29:37,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:29:37,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:29:37,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:29:37,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:29:37,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:29:37,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:29:37,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:29:37,719 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:29:37,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:29:37,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:29:37,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:29:37,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:29:37,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:29:37,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:29:37,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:29:37,722 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:29:37,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:29:37,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:29:37,722 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:29:37,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:29:37,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:29:37,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:29:37,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:29:37,724 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:29:37,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:29:37,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:29:37,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:29:37,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:29:37,985 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:29:37,985 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:29:37,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2023-04-02 14:29:39,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:29:39,394 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:29:39,394 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2023-04-02 14:29:39,404 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12b3a5874/6d646dc2aebc448c8cdeeb7b7a4f0093/FLAG5831118b9 [2023-04-02 14:29:39,417 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12b3a5874/6d646dc2aebc448c8cdeeb7b7a4f0093 [2023-04-02 14:29:39,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:29:39,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:29:39,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:29:39,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:29:39,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:29:39,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f098937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39, skipping insertion in model container [2023-04-02 14:29:39,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:29:39,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:29:39,573 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/reducercommutativity/sep10-2.i[1293,1306] [2023-04-02 14:29:39,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:29:39,584 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:29:39,601 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/reducercommutativity/sep10-2.i[1293,1306] [2023-04-02 14:29:39,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:29:39,613 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:29:39,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39 WrapperNode [2023-04-02 14:29:39,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:29:39,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:29:39,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:29:39,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:29:39,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:29:39,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:29:39,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:29:39,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:29:39,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (1/1) ... [2023-04-02 14:29:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:29:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:39,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:29:39,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:29:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:29:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:29:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:29:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-04-02 14:29:39,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-04-02 14:29:39,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:29:39,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:29:39,785 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:29:39,787 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:29:39,927 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:29:39,983 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:29:39,984 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:29:39,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:29:39 BoogieIcfgContainer [2023-04-02 14:29:39,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:29:39,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:29:39,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:29:39,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:29:39,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:29:39" (1/3) ... [2023-04-02 14:29:39,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b9ed34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:29:39, skipping insertion in model container [2023-04-02 14:29:39,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:29:39" (2/3) ... [2023-04-02 14:29:39,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b9ed34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:29:39, skipping insertion in model container [2023-04-02 14:29:39,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:29:39" (3/3) ... [2023-04-02 14:29:39,993 INFO L112 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2023-04-02 14:29:40,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:29:40,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:29:40,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:29:40,071 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;@6f29ff45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:29:40,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:29:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:29:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 14:29:40,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:40,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:40,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:40,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -485966958, now seen corresponding path program 1 times [2023-04-02 14:29:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719719848] [2023-04-02 14:29:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:29:40,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719719848] [2023-04-02 14:29:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719719848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:29:40,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:29:40,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:29:40,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826292325] [2023-04-02 14:29:40,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:29:40,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:29:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:29:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:29:40,473 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:40,543 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-02 14:29:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:29:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-02 14:29:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:40,556 INFO L225 Difference]: With dead ends: 41 [2023-04-02 14:29:40,557 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 14:29:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:29:40,564 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:40,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 14:29:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 14:29:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-02 14:29:40,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-02 14:29:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-02 14:29:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-02 14:29:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 14:29:40,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:40,603 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:40,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:29:40,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:40,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1157472597, now seen corresponding path program 1 times [2023-04-02 14:29:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:40,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569689387] [2023-04-02 14:29:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:29:40,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:40,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569689387] [2023-04-02 14:29:40,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569689387] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:40,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895884755] [2023-04-02 14:29:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:40,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:40,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:40,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:29:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:40,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:29:40,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:29:40,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:29:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895884755] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:29:40,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:29:40,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 14:29:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835957275] [2023-04-02 14:29:40,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:29:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:29:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:29:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:29:40,883 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:40,911 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-02 14:29:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:29:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 14:29:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:40,912 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:29:40,912 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 14:29:40,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:29:40,914 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:40,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 14:29:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 14:29:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-02 14:29:40,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-02 14:29:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:40,928 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-02 14:29:40,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-02 14:29:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 14:29:40,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:40,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:40,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:29:41,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:41,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:41,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1682533220, now seen corresponding path program 1 times [2023-04-02 14:29:41,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:41,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352724829] [2023-04-02 14:29:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:29:41,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352724829] [2023-04-02 14:29:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352724829] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073304365] [2023-04-02 14:29:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:41,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:41,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:29:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:41,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:29:41,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:29:41,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:29:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073304365] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:29:41,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:29:41,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 14:29:41,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109984289] [2023-04-02 14:29:41,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:29:41,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:29:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:29:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:29:41,333 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:41,348 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-02 14:29:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:29:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-02 14:29:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:41,349 INFO L225 Difference]: With dead ends: 31 [2023-04-02 14:29:41,349 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 14:29:41,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:29:41,350 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:41,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 14:29:41,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 14:29:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 14:29:41,355 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-02 14:29:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:41,356 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 14:29:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 14:29:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 14:29:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:29:41,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:41,357 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:41,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:29:41,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:41,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash 800179286, now seen corresponding path program 1 times [2023-04-02 14:29:41,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:41,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558710602] [2023-04-02 14:29:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:41,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:29:41,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:41,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558710602] [2023-04-02 14:29:41,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558710602] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982135123] [2023-04-02 14:29:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:41,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:41,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:41,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:29:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:41,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:29:41,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:29:41,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:29:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982135123] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067473917] [2023-04-02 14:29:41,880 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:41,880 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:41,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:41,887 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:41,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:41,945 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:42,698 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:42,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:42,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:43,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:43,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:43,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:43,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:29:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093007947] [2023-04-02 14:29:43,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:29:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:29:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=362, Unknown=8, NotChecked=0, Total=462 [2023-04-02 14:29:43,929 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:43,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:43,967 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-02 14:29:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:29:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-02 14:29:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:43,971 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:29:43,971 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 14:29:43,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=362, Unknown=8, NotChecked=0, Total=462 [2023-04-02 14:29:43,972 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 14:29:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 14:29:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-02 14:29:43,976 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-02 14:29:43,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:43,976 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-02 14:29:43,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-02 14:29:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:29:43,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:43,977 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:43,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 14:29:44,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:44,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:44,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:44,185 INFO L85 PathProgramCache]: Analyzing trace with hash 592310483, now seen corresponding path program 2 times [2023-04-02 14:29:44,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:44,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935973384] [2023-04-02 14:29:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:29:44,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935973384] [2023-04-02 14:29:44,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935973384] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:44,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130024948] [2023-04-02 14:29:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:29:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:44,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:44,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:44,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:29:44,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:29:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:44,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:29:44,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:29:44,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:29:44,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130024948] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469080039] [2023-04-02 14:29:44,408 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:44,408 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:44,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:44,409 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:44,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:44,430 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:44,877 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:44,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:44,970 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:45,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '949#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:45,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:45,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:29:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587944874] [2023-04-02 14:29:45,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:29:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:29:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=362, Unknown=8, NotChecked=0, Total=462 [2023-04-02 14:29:45,991 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:46,022 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-02 14:29:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:29:46,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-02 14:29:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:46,024 INFO L225 Difference]: With dead ends: 42 [2023-04-02 14:29:46,024 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 14:29:46,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=362, Unknown=8, NotChecked=0, Total=462 [2023-04-02 14:29:46,025 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:46,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 14:29:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 14:29:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-02 14:29:46,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-02 14:29:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:46,031 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-02 14:29:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-02 14:29:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 14:29:46,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:46,032 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:46,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:46,239 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:46,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1607993378, now seen corresponding path program 3 times [2023-04-02 14:29:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419656478] [2023-04-02 14:29:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-02 14:29:46,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:46,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419656478] [2023-04-02 14:29:46,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419656478] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:46,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220636180] [2023-04-02 14:29:46,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:29:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:46,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:46,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:29:46,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:29:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:46,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:29:46,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 14:29:46,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 14:29:46,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220636180] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:46,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511827870] [2023-04-02 14:29:46,540 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:46,540 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:46,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:46,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:46,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:46,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:46,922 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:46,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:46,998 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:47,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1338#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:47,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:47,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-02 14:29:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87218929] [2023-04-02 14:29:47,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:29:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:29:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=662, Unknown=8, NotChecked=0, Total=812 [2023-04-02 14:29:47,970 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:29:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:48,008 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-04-02 14:29:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:29:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 41 [2023-04-02 14:29:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:48,010 INFO L225 Difference]: With dead ends: 52 [2023-04-02 14:29:48,010 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 14:29:48,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=662, Unknown=8, NotChecked=0, Total=812 [2023-04-02 14:29:48,011 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:48,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 14:29:48,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 14:29:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-02 14:29:48,016 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-02 14:29:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:48,017 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-02 14:29:48,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:29:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-02 14:29:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 14:29:48,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:48,018 INFO L195 NwaCegarLoop]: trace histogram [30, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:48,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:48,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:48,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash 812733106, now seen corresponding path program 4 times [2023-04-02 14:29:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278105096] [2023-04-02 14:29:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:29:48,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278105096] [2023-04-02 14:29:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278105096] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814751698] [2023-04-02 14:29:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:29:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:48,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:48,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:29:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:48,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:29:48,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:29:48,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-02 14:29:48,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814751698] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:48,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318456959] [2023-04-02 14:29:48,710 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:48,710 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:48,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:48,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:48,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:48,728 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:49,119 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:49,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:49,231 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:50,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1874#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:50,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:50,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:50,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:29:50,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199544528] [2023-04-02 14:29:50,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:50,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:29:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:29:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=599, Unknown=8, NotChecked=0, Total=756 [2023-04-02 14:29:50,109 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:50,140 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-04-02 14:29:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:29:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-02 14:29:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:50,150 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:29:50,150 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 14:29:50,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=599, Unknown=8, NotChecked=0, Total=756 [2023-04-02 14:29:50,151 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 14:29:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 14:29:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-04-02 14:29:50,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 60 [2023-04-02 14:29:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:50,156 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-04-02 14:29:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-04-02 14:29:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 14:29:50,157 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:50,158 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:50,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:50,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:50,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 423994322, now seen corresponding path program 5 times [2023-04-02 14:29:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840174083] [2023-04-02 14:29:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-04-02 14:29:50,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:50,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840174083] [2023-04-02 14:29:50,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840174083] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:50,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088299719] [2023-04-02 14:29:50,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:29:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:50,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:50,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:50,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:29:50,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:29:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:50,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:29:50,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-04-02 14:29:50,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-04-02 14:29:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088299719] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701067784] [2023-04-02 14:29:50,695 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:50,695 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:50,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:50,695 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:50,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:50,708 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:51,041 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:51,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:51,127 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:51,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2482#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:51,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:51,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:51,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-02 14:29:51,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900036226] [2023-04-02 14:29:51,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 14:29:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 14:29:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=437, Unknown=8, NotChecked=0, Total=552 [2023-04-02 14:29:51,917 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:29:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:51,951 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-04-02 14:29:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 14:29:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2023-04-02 14:29:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:51,952 INFO L225 Difference]: With dead ends: 63 [2023-04-02 14:29:51,953 INFO L226 Difference]: Without dead ends: 45 [2023-04-02 14:29:51,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=437, Unknown=8, NotChecked=0, Total=552 [2023-04-02 14:29:51,954 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:51,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-02 14:29:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-02 14:29:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-04-02 14:29:51,959 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 66 [2023-04-02 14:29:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:51,960 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-04-02 14:29:51,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:29:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-04-02 14:29:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 14:29:51,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:51,961 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:51,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 14:29:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:52,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:52,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash -375875630, now seen corresponding path program 6 times [2023-04-02 14:29:52,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:52,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593922909] [2023-04-02 14:29:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:52,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-04-02 14:29:52,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:52,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593922909] [2023-04-02 14:29:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593922909] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:29:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831109556] [2023-04-02 14:29:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:29:52,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:52,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:52,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:52,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:29:52,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:29:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:52,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:29:52,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-04-02 14:29:52,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-04-02 14:29:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831109556] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710629294] [2023-04-02 14:29:52,724 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:29:52,724 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:52,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:52,725 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:52,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:52,739 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:53,067 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 19 for LOIs [2023-04-02 14:29:53,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:53,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:54,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3121#(and (<= 10 main_~i~1) (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 9 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:54,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:54,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:29:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-04-02 14:29:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479197654] [2023-04-02 14:29:54,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:29:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:29:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=557, Unknown=8, NotChecked=0, Total=702 [2023-04-02 14:29:54,006 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:29:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:54,043 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-04-02 14:29:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 14:29:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-04-02 14:29:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:54,045 INFO L225 Difference]: With dead ends: 66 [2023-04-02 14:29:54,045 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 14:29:54,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=557, Unknown=8, NotChecked=0, Total=702 [2023-04-02 14:29:54,046 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:54,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 14:29:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-04-02 14:29:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:29:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-04-02 14:29:54,051 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 70 [2023-04-02 14:29:54,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:54,052 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-04-02 14:29:54,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:29:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-04-02 14:29:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 14:29:54,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:54,053 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:54,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 14:29:54,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:54,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1901388894, now seen corresponding path program 7 times [2023-04-02 14:29:54,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219716324] [2023-04-02 14:29:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:30:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat