/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:01:56,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:01:56,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:01:56,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:01:56,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:01:56,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:01:56,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:01:56,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:01:56,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:01:56,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:01:56,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:01:56,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:01:56,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:01:56,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:01:56,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:01:56,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:01:56,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:01:56,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:01:56,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:01:56,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:01:56,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:01:56,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:01:56,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:01:56,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:01:56,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:01:56,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:01:56,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:01:56,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:01:56,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:01:56,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:01:56,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:01:56,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:01:56,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:01:56,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:01:56,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:01:56,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:01:56,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:01:56,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:01:56,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:01:56,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:01:56,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:01:56,719 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 14:01:56,746 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:01:56,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:01:56,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:01:56,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:01:56,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:01:56,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:01:56,748 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:01:56,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:01:56,748 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:01:56,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:01:56,749 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:01:56,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:01:56,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:01:56,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:01:56,750 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:01:56,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:01:56,750 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:01:56,750 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:01:56,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:01:56,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:01:56,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:01:56,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:01:56,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:01:56,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:01:56,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:01:56,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:01:56,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:01:56,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:01:56,983 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:01:56,984 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:01:56,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2023-04-02 14:01:58,185 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:01:58,360 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:01:58,360 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2023-04-02 14:01:58,365 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806dfdeda/e842d8643530480eba7ef09e345ee762/FLAGe1977f45e [2023-04-02 14:01:58,380 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806dfdeda/e842d8643530480eba7ef09e345ee762 [2023-04-02 14:01:58,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:01:58,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:01:58,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:01:58,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:01:58,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:01:58,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56401e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58, skipping insertion in model container [2023-04-02 14:01:58,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:01:58,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:01:58,504 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2023-04-02 14:01:58,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:01:58,528 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:01:58,543 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2023-04-02 14:01:58,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:01:58,566 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:01:58,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58 WrapperNode [2023-04-02 14:01:58,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:01:58,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:01:58,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:01:58,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:01:58,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:01:58,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:01:58,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:01:58,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:01:58,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (1/1) ... [2023-04-02 14:01:58,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:01:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:01:58,642 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 14:01:58,652 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 14:01:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:01:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:01:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:01:58,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:01:58,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:01:58,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:01:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:01:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:01:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:01:58,742 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:01:58,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:01:59,026 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:01:59,113 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:01:59,113 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 14:01:59,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:01:59 BoogieIcfgContainer [2023-04-02 14:01:59,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:01:59,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:01:59,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:01:59,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:01:59,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:01:58" (1/3) ... [2023-04-02 14:01:59,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b0c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:01:59, skipping insertion in model container [2023-04-02 14:01:59,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:01:58" (2/3) ... [2023-04-02 14:01:59,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b0c83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:01:59, skipping insertion in model container [2023-04-02 14:01:59,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:01:59" (3/3) ... [2023-04-02 14:01:59,123 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2023-04-02 14:01:59,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:01:59,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:01:59,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:01:59,175 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;@4543537b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:01:59,176 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:01:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:01:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 14:01:59,185 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:01:59,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:01:59,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:01:59,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:01:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -42571426, now seen corresponding path program 1 times [2023-04-02 14:01:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:01:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358210664] [2023-04-02 14:01:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:01:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:01:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:01:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:01:59,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:01:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358210664] [2023-04-02 14:01:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358210664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:01:59,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:01:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:01:59,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963456972] [2023-04-02 14:01:59,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:01:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:01:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:01:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:01:59,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:01:59,635 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:01:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:01:59,693 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2023-04-02 14:01:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:01:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 14:01:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:01:59,699 INFO L225 Difference]: With dead ends: 47 [2023-04-02 14:01:59,699 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 14:01:59,702 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 14:01:59,704 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:01:59,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:01:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 14:01:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 14:01:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:01:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-04-02 14:01:59,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 19 [2023-04-02 14:01:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:01:59,732 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-04-02 14:01:59,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:01:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-04-02 14:01:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:01:59,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:01:59,733 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] [2023-04-02 14:01:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:01:59,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:01:59,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:01:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 239722589, now seen corresponding path program 1 times [2023-04-02 14:01:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:01:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139439108] [2023-04-02 14:01:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:01:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:01:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:01:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:01:59,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:01:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139439108] [2023-04-02 14:01:59,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139439108] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:01:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512852646] [2023-04-02 14:01:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:01:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:01:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:01:59,843 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 14:01:59,844 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 14:01:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:01:59,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:01:59,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:02:00,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:02:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512852646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:02:00,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:02:00,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-02 14:02:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087019182] [2023-04-02 14:02:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:02:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:02:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:02:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 14:02:00,008 INFO L87 Difference]: Start difference. First operand 24 states and 33 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:00,065 INFO L93 Difference]: Finished difference Result 48 states and 72 transitions. [2023-04-02 14:02:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:02:00,065 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-02 14:02:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:00,067 INFO L225 Difference]: With dead ends: 48 [2023-04-02 14:02:00,067 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 14:02:00,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 14:02:00,069 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:00,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:02:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 14:02:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 14:02:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-04-02 14:02:00,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 20 [2023-04-02 14:02:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:00,082 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-04-02 14:02:00,082 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-04-02 14:02:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 14:02:00,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:00,083 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] [2023-04-02 14:02:00,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:02:00,290 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 14:02:00,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:00,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash 848062071, now seen corresponding path program 1 times [2023-04-02 14:02:00,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:00,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707214449] [2023-04-02 14:02:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:00,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:02:00,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707214449] [2023-04-02 14:02:00,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707214449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644680126] [2023-04-02 14:02:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:00,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:00,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:00,508 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 14:02:00,537 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 14:02:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:00,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:02:00,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:02:00,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 14:02:00,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644680126] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:00,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573262171] [2023-04-02 14:02:00,751 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:00,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:00,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:00,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:00,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:00,826 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:01,014 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:01,568 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:05,868 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:05,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:05,890 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:08,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_main_~#a9~0.base_BEFORE_CALL_1| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_1| |v_main_~#a9~0.base_BEFORE_CALL_1|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_1|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:08,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:08,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:02:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979288677] [2023-04-02 14:02:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:02:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:02:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:02:08,051 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:08,143 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2023-04-02 14:02:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:02:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-02 14:02:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:08,144 INFO L225 Difference]: With dead ends: 60 [2023-04-02 14:02:08,144 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 14:02:08,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:02:08,145 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:08,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 14:02:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 14:02:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2023-04-02 14:02:08,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 28 [2023-04-02 14:02:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:08,150 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2023-04-02 14:02:08,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2023-04-02 14:02:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 14:02:08,152 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:08,152 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:08,161 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 14:02:08,358 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 14:02:08,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:08,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1998972472, now seen corresponding path program 2 times [2023-04-02 14:02:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:08,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990944413] [2023-04-02 14:02:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 14:02:08,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990944413] [2023-04-02 14:02:08,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990944413] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965597053] [2023-04-02 14:02:08,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:08,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:08,453 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 14:02:08,478 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 14:02:08,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:02:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:02:08,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:02:08,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 14:02:08,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 14:02:08,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965597053] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169488178] [2023-04-02 14:02:08,636 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:08,636 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:08,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:08,637 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:08,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:08,660 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:08,717 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:09,006 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:12,081 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:12,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:12,101 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:13,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '893#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_2| Int) (|v_main_~#a9~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_2| |v_main_~#a9~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:13,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:13,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:13,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:02:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609839112] [2023-04-02 14:02:13,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:02:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:02:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:02:13,622 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:13,713 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2023-04-02 14:02:13,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:02:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-02 14:02:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:13,714 INFO L225 Difference]: With dead ends: 82 [2023-04-02 14:02:13,714 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 14:02:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:02:13,716 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:13,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 14:02:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-04-02 14:02:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2023-04-02 14:02:13,723 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 31 [2023-04-02 14:02:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:13,724 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2023-04-02 14:02:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2023-04-02 14:02:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 14:02:13,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:13,725 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:13,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:02:13,931 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 14:02:13,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:13,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1894438626, now seen corresponding path program 3 times [2023-04-02 14:02:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:13,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913801542] [2023-04-02 14:02:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:13,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:14,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913801542] [2023-04-02 14:02:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913801542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189812149] [2023-04-02 14:02:14,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:02:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:14,142 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 14:02:14,145 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 14:02:14,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:02:14,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:02:14,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:02:14,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:14,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189812149] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716805727] [2023-04-02 14:02:14,381 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:14,381 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:14,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:14,381 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:14,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:14,394 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:14,435 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:14,655 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:17,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:17,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:17,384 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:18,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1506#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a9~0.base_BEFORE_CALL_3| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_3|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_3| |v_main_~#a9~0.base_BEFORE_CALL_3|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_3|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:18,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:18,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:02:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253624706] [2023-04-02 14:02:18,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:02:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:02:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:02:18,931 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:19,004 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2023-04-02 14:02:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:02:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-02 14:02:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:19,005 INFO L225 Difference]: With dead ends: 114 [2023-04-02 14:02:19,005 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 14:02:19,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 14:02:19,006 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:19,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 14:02:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-04-02 14:02:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2023-04-02 14:02:19,013 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 55 [2023-04-02 14:02:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:19,013 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2023-04-02 14:02:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2023-04-02 14:02:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 14:02:19,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:19,015 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:19,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 14:02:19,221 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 14:02:19,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:19,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:19,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1530195778, now seen corresponding path program 4 times [2023-04-02 14:02:19,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:19,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708257785] [2023-04-02 14:02:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:19,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:19,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:19,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708257785] [2023-04-02 14:02:19,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708257785] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:19,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011986993] [2023-04-02 14:02:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:02:19,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:19,621 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 14:02:19,623 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 14:02:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:19,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:02:19,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:19,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:19,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011986993] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:19,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697489547] [2023-04-02 14:02:19,993 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:19,993 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:19,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:19,994 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:19,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:20,012 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:20,051 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:20,241 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:22,977 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:22,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:22,994 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:24,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2243#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a9~0.base_BEFORE_CALL_4| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_4|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0))) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_4| |v_main_~#a9~0.base_BEFORE_CALL_4|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_4|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:24,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:24,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:24,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:02:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539493544] [2023-04-02 14:02:24,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:24,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:02:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:02:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:02:24,625 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:24,687 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2023-04-02 14:02:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:02:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-02 14:02:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:24,688 INFO L225 Difference]: With dead ends: 126 [2023-04-02 14:02:24,688 INFO L226 Difference]: Without dead ends: 77 [2023-04-02 14:02:24,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:02:24,690 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:24,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-02 14:02:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-04-02 14:02:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-04-02 14:02:24,697 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 61 [2023-04-02 14:02:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:24,697 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-04-02 14:02:24,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-04-02 14:02:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 14:02:24,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:24,699 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:24,705 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 14:02:24,905 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 14:02:24,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:24,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 689190910, now seen corresponding path program 5 times [2023-04-02 14:02:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098834927] [2023-04-02 14:02:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-02 14:02:25,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098834927] [2023-04-02 14:02:25,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098834927] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:25,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84526022] [2023-04-02 14:02:25,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:25,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:25,734 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 14:02:25,737 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 14:02:26,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:02:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:02:26,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:02:26,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2023-04-02 14:02:26,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2023-04-02 14:02:26,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84526022] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:26,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230481893] [2023-04-02 14:02:26,482 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:26,482 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:26,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:26,482 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:26,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:26,494 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:26,547 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:26,730 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:29,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:29,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:29,387 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:31,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3110#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a9~0.base_BEFORE_CALL_5| Int) (|v_main_~#a1~0.base_BEFORE_CALL_5| Int)) (and (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_5| |v_main_~#a9~0.base_BEFORE_CALL_5|)) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_5|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_5|)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:31,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:31,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:31,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 14:02:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683600611] [2023-04-02 14:02:31,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:31,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 14:02:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 14:02:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:02:31,112 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:31,362 INFO L93 Difference]: Finished difference Result 175 states and 241 transitions. [2023-04-02 14:02:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 14:02:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 14:02:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:31,363 INFO L225 Difference]: With dead ends: 175 [2023-04-02 14:02:31,363 INFO L226 Difference]: Without dead ends: 126 [2023-04-02 14:02:31,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:02:31,365 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:31,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:02:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-02 14:02:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-04-02 14:02:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 120 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2023-04-02 14:02:31,380 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 73 [2023-04-02 14:02:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:31,381 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2023-04-02 14:02:31,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2023-04-02 14:02:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 14:02:31,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:31,386 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:31,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 14:02:31,586 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 14:02:31,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:31,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1385475005, now seen corresponding path program 6 times [2023-04-02 14:02:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:31,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726000048] [2023-04-02 14:02:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:32,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:32,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726000048] [2023-04-02 14:02:32,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726000048] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021640198] [2023-04-02 14:02:32,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:02:32,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:32,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:32,673 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 14:02:32,676 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 14:02:33,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:02:33,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:02:33,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:02:33,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:33,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021640198] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238169436] [2023-04-02 14:02:33,730 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:33,730 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:33,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:33,730 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:33,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:33,762 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:33,793 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:33,980 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:36,700 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:36,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:36,714 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:38,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4483#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a9~0.base_BEFORE_CALL_6| Int) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_6|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_6|) 0))) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_6| |v_main_~#a9~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_6|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:38,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:38,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:38,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 14:02:38,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935178264] [2023-04-02 14:02:38,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:38,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 14:02:38,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 14:02:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:02:38,464 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:38,558 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2023-04-02 14:02:38,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 14:02:38,558 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2023-04-02 14:02:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:38,561 INFO L225 Difference]: With dead ends: 248 [2023-04-02 14:02:38,561 INFO L226 Difference]: Without dead ends: 151 [2023-04-02 14:02:38,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:02:38,566 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:38,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-04-02 14:02:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-04-02 14:02:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.0689655172413792) internal successors, (155), 145 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2023-04-02 14:02:38,588 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 122 [2023-04-02 14:02:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:38,588 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2023-04-02 14:02:38,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2023-04-02 14:02:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 14:02:38,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:38,590 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:38,598 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 14:02:38,800 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 14:02:38,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:38,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash -154080674, now seen corresponding path program 7 times [2023-04-02 14:02:38,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:38,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581777292] [2023-04-02 14:02:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:38,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:41,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581777292] [2023-04-02 14:02:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581777292] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277230302] [2023-04-02 14:02:41,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:02:41,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:41,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:41,579 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 14:02:41,600 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 14:02:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:42,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 14:02:42,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:02:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:42,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:02:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:44,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277230302] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:02:44,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856626053] [2023-04-02 14:02:44,621 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:02:44,621 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:02:44,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:02:44,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:02:44,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:02:44,634 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:02:44,679 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:44,866 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:02:47,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:02:47,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:02:47,409 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:02:49,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6252#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a9~0.base_BEFORE_CALL_7| Int) (|v_main_~#a1~0.base_BEFORE_CALL_7| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_7|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_7| |v_main_~#a9~0.base_BEFORE_CALL_7|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_7|) 0))))) (= |#NULL.base| 0))' at error location [2023-04-02 14:02:49,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:02:49,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:02:49,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 14:02:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928444838] [2023-04-02 14:02:49,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:02:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 14:02:49,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:02:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 14:02:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:02:49,418 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:02:49,597 INFO L93 Difference]: Finished difference Result 298 states and 365 transitions. [2023-04-02 14:02:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 14:02:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2023-04-02 14:02:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:02:49,600 INFO L225 Difference]: With dead ends: 298 [2023-04-02 14:02:49,600 INFO L226 Difference]: Without dead ends: 201 [2023-04-02 14:02:49,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 14:02:49,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:02:49,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:02:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-02 14:02:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-04-02 14:02:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 195 states have (on average 1.0512820512820513) internal successors, (205), 195 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:02:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 210 transitions. [2023-04-02 14:02:49,631 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 210 transitions. Word has length 147 [2023-04-02 14:02:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:02:49,633 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 210 transitions. [2023-04-02 14:02:49,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:02:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 210 transitions. [2023-04-02 14:02:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-02 14:02:49,635 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:02:49,635 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:02:49,650 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 14:02:49,842 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 14:02:49,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:02:49,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:02:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -489543874, now seen corresponding path program 8 times [2023-04-02 14:02:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:02:49,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767000150] [2023-04-02 14:02:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:02:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:02:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-04-02 14:02:56,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767000150] [2023-04-02 14:02:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767000150] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256328486] [2023-04-02 14:02:56,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:56,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:56,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:56,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:02:56,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:03:16,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 14:03:16,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:03:16,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:03:16,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:03:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2023-04-02 14:03:17,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:03:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5236 trivial. 0 not checked. [2023-04-02 14:03:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256328486] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:03:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932121942] [2023-04-02 14:03:17,707 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:03:17,707 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:03:17,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:03:17,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:03:17,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:03:17,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:03:17,754 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:03:17,960 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:03:20,427 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:03:20,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:03:20,442 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:03:23,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8543#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a9~0.base_BEFORE_CALL_8| Int) (|v_main_~#a1~0.base_BEFORE_CALL_8| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_8|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_8|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_8| |v_main_~#a9~0.base_BEFORE_CALL_8|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_8|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:03:23,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:03:23,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:03:23,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 14:03:23,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620951029] [2023-04-02 14:03:23,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:03:23,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 14:03:23,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:03:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 14:03:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 14:03:23,159 INFO L87 Difference]: Start difference. First operand 201 states and 210 transitions. Second operand has 123 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 123 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:03:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:03:23,692 INFO L93 Difference]: Finished difference Result 395 states and 509 transitions. [2023-04-02 14:03:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 14:03:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 123 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2023-04-02 14:03:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:03:23,694 INFO L225 Difference]: With dead ends: 395 [2023-04-02 14:03:23,694 INFO L226 Difference]: Without dead ends: 298 [2023-04-02 14:03:23,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 14:03:23,696 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:03:23,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:03:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-04-02 14:03:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-04-02 14:03:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0342465753424657) internal successors, (302), 292 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:03:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 307 transitions. [2023-04-02 14:03:23,707 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 307 transitions. Word has length 197 [2023-04-02 14:03:23,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:03:23,707 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 307 transitions. [2023-04-02 14:03:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.2276422764227641) internal successors, (151), 123 states have internal predecessors, (151), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:03:23,708 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 307 transitions. [2023-04-02 14:03:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-04-02 14:03:23,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:03:23,711 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:03:23,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:03:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:03:23,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:03:23,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:03:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1514789763, now seen corresponding path program 9 times [2023-04-02 14:03:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:03:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062518415] [2023-04-02 14:03:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:03:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:03:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:03:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:03:31,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:03:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062518415] [2023-04-02 14:03:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062518415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:03:31,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088626760] [2023-04-02 14:03:31,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:03:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:03:31,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:03:31,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:03:31,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:03:32,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:03:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:03:32,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 3160 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 14:03:32,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:03:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:03:32,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:03:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:03:41,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088626760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:03:41,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28754192] [2023-04-02 14:03:41,946 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:03:41,946 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:03:41,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:03:41,946 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:03:41,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:03:41,957 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:03:41,984 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:03:42,182 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:03:44,632 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:03:44,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:03:44,650 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:03:47,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11884#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_9| Int) (|v_main_~#a9~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_9|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a9~0.base_BEFORE_CALL_9|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_9|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_9|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_9| |v_main_~#a9~0.base_BEFORE_CALL_9|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:03:47,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:03:47,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:03:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 14:03:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748977546] [2023-04-02 14:03:47,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:03:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 14:03:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:03:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 14:03:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:03:47,227 INFO L87 Difference]: Start difference. First operand 298 states and 307 transitions. Second operand has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 203 states have internal predecessors, (225), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:03:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:03:47,636 INFO L93 Difference]: Finished difference Result 592 states and 710 transitions. [2023-04-02 14:03:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 14:03:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 203 states have internal predecessors, (225), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2023-04-02 14:03:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:03:47,640 INFO L225 Difference]: With dead ends: 592 [2023-04-02 14:03:47,640 INFO L226 Difference]: Without dead ends: 399 [2023-04-02 14:03:47,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 14:03:47,644 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:03:47,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:03:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-04-02 14:03:47,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2023-04-02 14:03:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 393 states have (on average 1.025445292620865) internal successors, (403), 393 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:03:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 408 transitions. [2023-04-02 14:03:47,658 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 408 transitions. Word has length 294 [2023-04-02 14:03:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:03:47,659 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 408 transitions. [2023-04-02 14:03:47,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.1083743842364533) internal successors, (225), 203 states have internal predecessors, (225), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:03:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 408 transitions. [2023-04-02 14:03:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-04-02 14:03:47,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:03:47,665 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:03:47,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:03:47,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:03:47,877 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:03:47,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:03:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1569163042, now seen corresponding path program 10 times [2023-04-02 14:03:47,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:03:47,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79597094] [2023-04-02 14:03:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:03:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:03:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:04:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:04:13,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:04:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79597094] [2023-04-02 14:04:13,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79597094] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:04:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037394346] [2023-04-02 14:04:13,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:04:13,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:04:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:04:13,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:04:13,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:04:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:04:14,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 4877 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 14:04:14,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:04:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:04:15,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:04:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2023-04-02 14:04:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037394346] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:04:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298665998] [2023-04-02 14:04:53,036 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 14:04:53,036 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:04:53,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:04:53,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:04:53,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:04:53,050 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:04:53,091 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:04:53,274 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 14:04:55,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:04:55,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:04:55,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:04:59,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16629#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_10| Int) (|v_main_~#a9~0.base_BEFORE_CALL_10| Int)) (and (<= 2 |v_main_~#a9~0.base_BEFORE_CALL_10|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |v_main_~#a9~0.base_BEFORE_CALL_10|)) (not (= (select (select |#memory_int| |v_main_~#a9~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_10|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a9~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a9~0.base_BEFORE_CALL_10|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:04:59,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:04:59,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:04:59,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:04:59,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551472190] [2023-04-02 14:04:59,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:04:59,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:04:59,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:04:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:04:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:04:59,437 INFO L87 Difference]: Start difference. First operand 399 states and 408 transitions. Second operand has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 405 states have internal predecessors, (427), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:01,245 INFO L93 Difference]: Finished difference Result 794 states and 1013 transitions. [2023-04-02 14:05:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:05:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 405 states have internal predecessors, (427), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2023-04-02 14:05:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:01,248 INFO L225 Difference]: With dead ends: 794 [2023-04-02 14:05:01,248 INFO L226 Difference]: Without dead ends: 601 [2023-04-02 14:05:01,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:05:01,257 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:05:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-04-02 14:05:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2023-04-02 14:05:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 595 states have (on average 1.0168067226890756) internal successors, (605), 595 states have internal predecessors, (605), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:05:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 610 transitions. [2023-04-02 14:05:01,276 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 610 transitions. Word has length 395 [2023-04-02 14:05:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:01,276 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 610 transitions. [2023-04-02 14:05:01,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.054320987654321) internal successors, (427), 405 states have internal predecessors, (427), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 610 transitions. [2023-04-02 14:05:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2023-04-02 14:05:01,286 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:01,286 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:01,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:01,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:05:01,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:01,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:01,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1880816702, now seen corresponding path program 11 times [2023-04-02 14:05:01,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:01,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945401994] [2023-04-02 14:05:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:01,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat