/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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:33:41,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:33:41,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:33:41,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:33:41,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:33:41,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:33:41,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:33:41,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:33:41,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:33:41,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:33:41,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:33:41,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:33:41,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:33:41,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:33:41,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:33:41,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:33:41,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:33:41,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:33:41,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:33:41,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:33:41,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:33:41,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:33:41,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:33:41,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:33:41,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 06:33:41,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:33:41,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:33:41,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:33:41,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:33:41,670 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:33:41,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:33:41,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:33:41,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:33:41,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:33:41,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:33:41,673 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:33:41,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:33:41,673 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:33:41,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:33:41,674 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:33:41,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:33:41,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:33:41,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:33:41,674 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:33:41,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:33:41,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:33:41,675 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:33:41,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:33:41,675 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:33:41,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:33:41,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:33:41,677 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:33:41,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:33:41,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:33:41,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:33:41,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:33:41,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:33:41,677 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:33:41,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:33:41,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:33:41,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:33:41,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:33:41,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:33:41,927 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:33:41,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:33:43,129 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:33:43,364 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:33:43,364 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:33:43,380 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8c26487/696eddb364ec49ae80da845d6cc434bf/FLAG6c6693078 [2023-04-01 06:33:43,394 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8c26487/696eddb364ec49ae80da845d6cc434bf [2023-04-01 06:33:43,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:33:43,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:33:43,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:33:43,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:33:43,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:33:43,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eed6036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43, skipping insertion in model container [2023-04-01 06:33:43,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:33:43,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:33:43,618 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2023-04-01 06:33:43,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:33:43,654 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:33:43,686 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2023-04-01 06:33:43,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:33:43,718 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:33:43,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43 WrapperNode [2023-04-01 06:33:43,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:33:43,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:33:43,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:33:43,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:33:43,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,769 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:33:43,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:33:43,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:33:43,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:33:43,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (1/1) ... [2023-04-01 06:33:43,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:33:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:33:43,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:33:43,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:33:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:33:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:33:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:33:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:33:43,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:33:43,883 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:33:43,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:33:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:33:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:33:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:33:43,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:33:43,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:33:44,034 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:33:44,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:33:44,418 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:33:44,562 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:33:44,562 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:33:44,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:33:44 BoogieIcfgContainer [2023-04-01 06:33:44,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:33:44,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:33:44,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:33:44,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:33:44,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:33:43" (1/3) ... [2023-04-01 06:33:44,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfb5398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:33:44, skipping insertion in model container [2023-04-01 06:33:44,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:33:43" (2/3) ... [2023-04-01 06:33:44,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfb5398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:33:44, skipping insertion in model container [2023-04-01 06:33:44,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:33:44" (3/3) ... [2023-04-01 06:33:44,572 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 06:33:44,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:33:44,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:33:44,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:33:44,649 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;@11b16763, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:33:44,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:33:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 84 states have (on average 1.6547619047619047) internal successors, (139), 85 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:33:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 06:33:44,659 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:44,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:44,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:44,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash -472051513, now seen corresponding path program 1 times [2023-04-01 06:33:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928633586] [2023-04-01 06:33:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:45,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928633586] [2023-04-01 06:33:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928633586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:45,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:45,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:33:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203623443] [2023-04-01 06:33:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:33:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:33:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,176 INFO L87 Difference]: Start difference. First operand has 90 states, 84 states have (on average 1.6547619047619047) internal successors, (139), 85 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:45,302 INFO L93 Difference]: Finished difference Result 199 states and 302 transitions. [2023-04-01 06:33:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:33:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 06:33:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:45,315 INFO L225 Difference]: With dead ends: 199 [2023-04-01 06:33:45,315 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 06:33:45,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,321 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 105 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:45,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 273 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:33:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 06:33:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-04-01 06:33:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.408) internal successors, (176), 125 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2023-04-01 06:33:45,363 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 41 [2023-04-01 06:33:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:45,364 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2023-04-01 06:33:45,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2023-04-01 06:33:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 06:33:45,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:45,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:45,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:33:45,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:45,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1678701204, now seen corresponding path program 1 times [2023-04-01 06:33:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:45,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920229367] [2023-04-01 06:33:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:45,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:45,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:45,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920229367] [2023-04-01 06:33:45,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920229367] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:45,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:45,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:33:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92292470] [2023-04-01 06:33:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:45,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:33:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:33:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,463 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:45,526 INFO L93 Difference]: Finished difference Result 305 states and 443 transitions. [2023-04-01 06:33:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:33:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-01 06:33:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:45,528 INFO L225 Difference]: With dead ends: 305 [2023-04-01 06:33:45,528 INFO L226 Difference]: Without dead ends: 206 [2023-04-01 06:33:45,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,530 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:45,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 219 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:33:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-01 06:33:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-01 06:33:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.44) internal successors, (288), 200 states have internal predecessors, (288), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 291 transitions. [2023-04-01 06:33:45,567 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 291 transitions. Word has length 44 [2023-04-01 06:33:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:45,567 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 291 transitions. [2023-04-01 06:33:45,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 291 transitions. [2023-04-01 06:33:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 06:33:45,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:45,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:45,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:33:45,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:45,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -416097592, now seen corresponding path program 1 times [2023-04-01 06:33:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727163869] [2023-04-01 06:33:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:45,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:45,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:45,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727163869] [2023-04-01 06:33:45,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727163869] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:45,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:45,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:33:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767636052] [2023-04-01 06:33:45,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:45,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:33:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:33:45,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,656 INFO L87 Difference]: Start difference. First operand 204 states and 291 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:45,727 INFO L93 Difference]: Finished difference Result 508 states and 745 transitions. [2023-04-01 06:33:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:33:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-01 06:33:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:45,731 INFO L225 Difference]: With dead ends: 508 [2023-04-01 06:33:45,731 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 06:33:45,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,734 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 73 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:45,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 204 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:33:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 06:33:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2023-04-01 06:33:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 328 states have (on average 1.451219512195122) internal successors, (476), 328 states have internal predecessors, (476), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 479 transitions. [2023-04-01 06:33:45,785 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 479 transitions. Word has length 47 [2023-04-01 06:33:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:45,785 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 479 transitions. [2023-04-01 06:33:45,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 479 transitions. [2023-04-01 06:33:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 06:33:45,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:45,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:45,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:33:45,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:45,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2036743711, now seen corresponding path program 1 times [2023-04-01 06:33:45,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:45,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018979580] [2023-04-01 06:33:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:45,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018979580] [2023-04-01 06:33:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018979580] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:33:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841067381] [2023-04-01 06:33:45,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:33:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:33:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:45,869 INFO L87 Difference]: Start difference. First operand 332 states and 479 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:46,006 INFO L93 Difference]: Finished difference Result 848 states and 1241 transitions. [2023-04-01 06:33:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:33:46,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-01 06:33:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:46,012 INFO L225 Difference]: With dead ends: 848 [2023-04-01 06:33:46,012 INFO L226 Difference]: Without dead ends: 546 [2023-04-01 06:33:46,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:33:46,015 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 68 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:46,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 189 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:33:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-04-01 06:33:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2023-04-01 06:33:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 540 states have (on average 1.4444444444444444) internal successors, (780), 540 states have internal predecessors, (780), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 783 transitions. [2023-04-01 06:33:46,095 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 783 transitions. Word has length 50 [2023-04-01 06:33:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:46,096 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 783 transitions. [2023-04-01 06:33:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 783 transitions. [2023-04-01 06:33:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 06:33:46,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:46,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:46,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:33:46,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:46,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1310305150, now seen corresponding path program 1 times [2023-04-01 06:33:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57936550] [2023-04-01 06:33:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:46,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:46,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:46,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57936550] [2023-04-01 06:33:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57936550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:46,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:33:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911470286] [2023-04-01 06:33:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:46,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:33:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:33:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:33:46,306 INFO L87 Difference]: Start difference. First operand 544 states and 783 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:46,815 INFO L93 Difference]: Finished difference Result 2248 states and 3251 transitions. [2023-04-01 06:33:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:33:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-01 06:33:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:46,823 INFO L225 Difference]: With dead ends: 2248 [2023-04-01 06:33:46,824 INFO L226 Difference]: Without dead ends: 1734 [2023-04-01 06:33:46,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:33:46,829 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 283 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 405 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:33:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-04-01 06:33:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1728. [2023-04-01 06:33:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1724 states have (on average 1.4408352668213458) internal successors, (2484), 1724 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2487 transitions. [2023-04-01 06:33:47,272 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2487 transitions. Word has length 53 [2023-04-01 06:33:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:47,274 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 2487 transitions. [2023-04-01 06:33:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2487 transitions. [2023-04-01 06:33:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 06:33:47,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:47,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:47,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:33:47,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:47,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1467113173, now seen corresponding path program 1 times [2023-04-01 06:33:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:47,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311866251] [2023-04-01 06:33:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:47,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:47,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:47,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311866251] [2023-04-01 06:33:47,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311866251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:33:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046960430] [2023-04-01 06:33:47,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:47,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:33:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:33:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:33:47,426 INFO L87 Difference]: Start difference. First operand 1728 states and 2487 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:48,129 INFO L93 Difference]: Finished difference Result 4434 states and 6431 transitions. [2023-04-01 06:33:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:33:48,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 06:33:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:48,141 INFO L225 Difference]: With dead ends: 4434 [2023-04-01 06:33:48,141 INFO L226 Difference]: Without dead ends: 2736 [2023-04-01 06:33:48,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:33:48,147 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 448 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:48,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 115 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:33:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-04-01 06:33:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2734. [2023-04-01 06:33:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2730 states have (on average 1.4336996336996337) internal successors, (3914), 2730 states have internal predecessors, (3914), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3917 transitions. [2023-04-01 06:33:48,634 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3917 transitions. Word has length 55 [2023-04-01 06:33:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:48,635 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3917 transitions. [2023-04-01 06:33:48,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3917 transitions. [2023-04-01 06:33:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 06:33:48,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:48,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:48,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:33:48,638 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:48,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1861974800, now seen corresponding path program 1 times [2023-04-01 06:33:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:48,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519393024] [2023-04-01 06:33:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:49,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:49,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519393024] [2023-04-01 06:33:49,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519393024] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:33:49,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:33:49,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 06:33:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548429530] [2023-04-01 06:33:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:33:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 06:33:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:33:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 06:33:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 06:33:49,134 INFO L87 Difference]: Start difference. First operand 2734 states and 3917 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:33:50,296 INFO L93 Difference]: Finished difference Result 5166 states and 7423 transitions. [2023-04-01 06:33:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 06:33:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 06:33:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:33:50,322 INFO L225 Difference]: With dead ends: 5166 [2023-04-01 06:33:50,323 INFO L226 Difference]: Without dead ends: 5164 [2023-04-01 06:33:50,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:33:50,325 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 711 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:33:50,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1451 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:33:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2023-04-01 06:33:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 2981. [2023-04-01 06:33:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2977 states have (on average 1.4339939536446087) internal successors, (4269), 2977 states have internal predecessors, (4269), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4272 transitions. [2023-04-01 06:33:50,836 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4272 transitions. Word has length 55 [2023-04-01 06:33:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:33:50,837 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 4272 transitions. [2023-04-01 06:33:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:33:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4272 transitions. [2023-04-01 06:33:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 06:33:50,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:33:50,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:33:50,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:33:50,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:33:50,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:33:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1265444710, now seen corresponding path program 1 times [2023-04-01 06:33:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:33:50,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383015801] [2023-04-01 06:33:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:33:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:52,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:33:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383015801] [2023-04-01 06:33:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383015801] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:33:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271645968] [2023-04-01 06:33:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:33:52,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:33:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:33:52,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 06:33:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:33:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:33:52,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 60 conjunts are in the unsatisfiable core [2023-04-01 06:33:52,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:33:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:33:54,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:34:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:34:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271645968] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:34:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967003027] [2023-04-01 06:34:02,095 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-01 06:34:02,095 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:34:02,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:34:02,102 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:34:02,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:34:02,833 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 146 for LOIs [2023-04-01 06:34:04,823 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2023-04-01 06:34:39,929 WARN L223 SmtUtils]: Spent 34.48s on a formula simplification. DAG size of input: 8097 DAG size of output: 370 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)