/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-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:44:48,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:44:48,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:44:48,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:44:48,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:44:48,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:44:48,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:44:48,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:44:48,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:44:48,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:44:48,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:44:48,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:44:48,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:44:48,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:44:48,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:44:48,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:44:48,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:44:48,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:44:48,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:44:48,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:44:48,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:44:48,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:44:48,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:44:48,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:44:48,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:44:48,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:44:48,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:44:48,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:44:48,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:44:48,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:44:48,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:44:48,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:44:48,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:44:48,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:44:48,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:44:48,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:44:48,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:44:48,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:44:48,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:44:48,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:44:48,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:44:48,087 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 14:44:48,115 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:44:48,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:44:48,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:44:48,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:44:48,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:44:48,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:44:48,117 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:44:48,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:44:48,118 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:44:48,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:44:48,118 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:44:48,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:44:48,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:44:48,119 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:44:48,119 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:44:48,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:44:48,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:44:48,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:44:48,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:44:48,120 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:44:48,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:44:48,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:44:48,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:44:48,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:44:48,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:44:48,121 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:44:48,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:44:48,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:44:48,122 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:44:48,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:44:48,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:44:48,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:44:48,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:44:48,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:44:48,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:44:48,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:44:48,316 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:44:48,316 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:44:48,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-04-02 14:44:49,321 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:44:49,487 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:44:49,488 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2023-04-02 14:44:49,492 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404c0fe45/f2a6e5d3e191482789421976e4d04b93/FLAGcb574873c [2023-04-02 14:44:49,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404c0fe45/f2a6e5d3e191482789421976e4d04b93 [2023-04-02 14:44:49,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:44:49,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:44:49,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:44:49,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:44:49,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:44:49,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d75e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49, skipping insertion in model container [2023-04-02 14:44:49,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:44:49,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:44:49,634 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-programs/partial_mod_count_limited_3.c[331,344] [2023-04-02 14:44:49,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:44:49,655 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:44:49,662 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-programs/partial_mod_count_limited_3.c[331,344] [2023-04-02 14:44:49,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:44:49,676 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:44:49,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49 WrapperNode [2023-04-02 14:44:49,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:44:49,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:44:49,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:44:49,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:44:49,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,697 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:44:49,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:44:49,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:44:49,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:44:49,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (1/1) ... [2023-04-02 14:44:49,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:44:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:49,736 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 14:44:49,744 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 14:44:49,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:44:49,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:44:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:44:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:44:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 14:44:49,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:44:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:44:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:44:49,818 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:44:49,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:44:49,975 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:44:50,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:44:50,038 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:44:50,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:44:50 BoogieIcfgContainer [2023-04-02 14:44:50,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:44:50,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:44:50,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:44:50,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:44:50,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:44:49" (1/3) ... [2023-04-02 14:44:50,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d66ed37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:44:50, skipping insertion in model container [2023-04-02 14:44:50,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:44:49" (2/3) ... [2023-04-02 14:44:50,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d66ed37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:44:50, skipping insertion in model container [2023-04-02 14:44:50,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:44:50" (3/3) ... [2023-04-02 14:44:50,056 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2023-04-02 14:44:50,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:44:50,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:44:50,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:44:50,108 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;@266d0534, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:44:50,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:44:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:44:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:44:50,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:50,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:50,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:50,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 745588606, now seen corresponding path program 1 times [2023-04-02 14:44:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989199756] [2023-04-02 14:44:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:50,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:50,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622384346] [2023-04-02 14:44:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:50,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:50,204 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 14:44:50,205 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 14:44:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:44:50,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:44:50,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:50,391 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 14:44:50,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:44:50,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989199756] [2023-04-02 14:44:50,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622384346] [2023-04-02 14:44:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622384346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:44:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:44:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:44:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199438344] [2023-04-02 14:44:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:44:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:44:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:44:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:44:50,421 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:44:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:50,464 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-02 14:44:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:44:50,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 14:44:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:50,470 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:44:50,470 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:44:50,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:44:50,474 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:50,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:44:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:44:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-04-02 14:44:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:44:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-02 14:44:50,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-04-02 14:44:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:50,497 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-02 14:44:50,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:44:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-02 14:44:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:44:50,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:50,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:50,505 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 14:44:50,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 14:44:50,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:50,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1499595414, now seen corresponding path program 1 times [2023-04-02 14:44:50,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:50,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844217704] [2023-04-02 14:44:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:50,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:50,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:50,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432942465] [2023-04-02 14:44:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:50,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:50,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:50,726 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 14:44:50,729 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 14:44:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:44:50,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:44:50,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:50,803 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 14:44:50,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:50,835 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 14:44:50,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844217704] [2023-04-02 14:44:50,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:50,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432942465] [2023-04-02 14:44:50,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432942465] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:44:50,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212462611] [2023-04-02 14:44:50,864 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:44:50,864 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:50,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:50,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:50,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:50,948 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:51,315 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-02 14:44:51,342 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:44:51,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:51,361 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [212462611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:44:51,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-02 14:44:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323073296] [2023-04-02 14:44:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:44:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 14:44:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 14:44:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 14:44:51,976 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:44:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:53,812 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-02 14:44:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 14:44:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-02 14:44:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:53,813 INFO L225 Difference]: With dead ends: 31 [2023-04-02 14:44:53,813 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 14:44:53,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:44:53,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:53,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:44:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 14:44:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-04-02 14:44:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:44:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-04-02 14:44:53,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 16 [2023-04-02 14:44:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:53,830 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-04-02 14:44:53,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:44:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-04-02 14:44:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 14:44:53,831 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:53,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:53,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:44:54,036 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,SelfDestructingSolverStorable1 [2023-04-02 14:44:54,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:54,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2095682240, now seen corresponding path program 1 times [2023-04-02 14:44:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:54,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570283646] [2023-04-02 14:44:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:54,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:54,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:54,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30046741] [2023-04-02 14:44:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:54,074 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 14:44:54,097 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 14:44:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:44:54,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:44:54,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:44:54,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:44:54,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570283646] [2023-04-02 14:44:54,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30046741] [2023-04-02 14:44:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30046741] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:44:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366017453] [2023-04-02 14:44:54,194 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:54,194 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:54,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:54,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:54,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:54,221 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:54,706 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:44:54,718 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:44:54,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:54,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:55,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:55,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:55,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:44:55,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:44:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481629444] [2023-04-02 14:44:55,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:55,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:44:55,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:44:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:44:55,390 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:44:55,491 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-04-02 14:44:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:44:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-04-02 14:44:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:44:55,495 INFO L225 Difference]: With dead ends: 52 [2023-04-02 14:44:55,495 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 14:44:55,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:44:55,505 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:44:55,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:44:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 14:44:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2023-04-02 14:44:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:44:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-04-02 14:44:55,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2023-04-02 14:44:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:44:55,519 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-04-02 14:44:55,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:44:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-04-02 14:44:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 14:44:55,520 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:44:55,521 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:44:55,535 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 14:44:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:55,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:44:55,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:44:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1823173036, now seen corresponding path program 2 times [2023-04-02 14:44:55,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:44:55,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049804736] [2023-04-02 14:44:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:44:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:44:55,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:44:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707660941] [2023-04-02 14:44:55,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:44:55,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:44:55,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:44:55,747 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 14:44:55,761 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 14:44:55,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:44:55,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:44:55,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 14:44:55,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:44:56,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:44:56,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-04-02 14:44:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:44:56,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:44:56,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:44:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049804736] [2023-04-02 14:44:56,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:44:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707660941] [2023-04-02 14:44:56,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707660941] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:44:56,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420649792] [2023-04-02 14:44:56,328 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:44:56,328 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:44:56,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:44:56,328 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:44:56,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:44:56,356 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:44:56,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:44:56,746 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:44:56,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:44:56,753 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:44:59,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:44:59,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:44:59,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:44:59,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 14:44:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632762348] [2023-04-02 14:44:59,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:44:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 14:44:59,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:44:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 14:44:59,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=733, Unknown=1, NotChecked=0, Total=870 [2023-04-02 14:44:59,540 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:45:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:00,803 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-04-02 14:45:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 14:45:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-04-02 14:45:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:00,804 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:45:00,804 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 14:45:00,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=163, Invalid=892, Unknown=1, NotChecked=0, Total=1056 [2023-04-02 14:45:00,805 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:00,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 37 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 2 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 14:45:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 14:45:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-04-02 14:45:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:45:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-04-02 14:45:00,814 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2023-04-02 14:45:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:00,814 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-04-02 14:45:00,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:45:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-04-02 14:45:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:45:00,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:00,815 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:00,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:01,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:01,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 191173310, now seen corresponding path program 3 times [2023-04-02 14:45:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:01,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232427233] [2023-04-02 14:45:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:01,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:01,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595151627] [2023-04-02 14:45:01,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:45:01,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:01,053 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 14:45:01,079 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 14:45:01,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:45:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:01,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:45:01,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:45:01,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:45:01,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232427233] [2023-04-02 14:45:01,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595151627] [2023-04-02 14:45:01,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595151627] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:01,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648344969] [2023-04-02 14:45:01,232 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:01,232 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:01,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:01,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:01,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:01,246 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:01,546 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:01,559 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:01,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:01,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:02,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:02,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:02,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:02,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:45:02,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630449520] [2023-04-02 14:45:02,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:02,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:45:02,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:02,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:45:02,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2023-04-02 14:45:02,254 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:02,432 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2023-04-02 14:45:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:45:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-04-02 14:45:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:02,433 INFO L225 Difference]: With dead ends: 87 [2023-04-02 14:45:02,433 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 14:45:02,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:45:02,434 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:02,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:45:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 14:45:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2023-04-02 14:45:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:45:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-04-02 14:45:02,447 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2023-04-02 14:45:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:02,447 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-04-02 14:45:02,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-04-02 14:45:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 14:45:02,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:02,448 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:02,453 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 14:45:02,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:02,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:02,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -547353794, now seen corresponding path program 4 times [2023-04-02 14:45:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039924695] [2023-04-02 14:45:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:02,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:02,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332153395] [2023-04-02 14:45:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:45:02,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:02,694 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 14:45:02,695 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 14:45:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:02,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:45:02,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:45:02,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:45:03,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:03,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039924695] [2023-04-02 14:45:03,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:03,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332153395] [2023-04-02 14:45:03,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332153395] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:03,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477187190] [2023-04-02 14:45:03,086 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:03,087 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:03,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:03,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:03,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:03,105 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:03,378 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:03,386 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:03,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:03,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:04,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1620#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:04,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:04,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 14:45:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731516769] [2023-04-02 14:45:04,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 14:45:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 14:45:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 14:45:04,083 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:04,491 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2023-04-02 14:45:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 14:45:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-04-02 14:45:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:04,492 INFO L225 Difference]: With dead ends: 135 [2023-04-02 14:45:04,492 INFO L226 Difference]: Without dead ends: 113 [2023-04-02 14:45:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=669, Invalid=1983, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 14:45:04,494 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 31 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:45:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-02 14:45:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2023-04-02 14:45:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:45:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-04-02 14:45:04,510 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2023-04-02 14:45:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:04,510 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-04-02 14:45:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-04-02 14:45:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 14:45:04,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:04,511 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:04,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:04,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:04,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:04,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1456939970, now seen corresponding path program 5 times [2023-04-02 14:45:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:04,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077225345] [2023-04-02 14:45:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:04,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:04,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713377335] [2023-04-02 14:45:04,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:45:04,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:04,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:04,735 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 14:45:04,737 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 14:45:04,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:45:04,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:04,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 14:45:04,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:05,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:45:05,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 94 [2023-04-02 14:45:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-04-02 14:45:05,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:05,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077225345] [2023-04-02 14:45:05,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713377335] [2023-04-02 14:45:05,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713377335] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:45:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653114593] [2023-04-02 14:45:05,684 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:05,684 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:05,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:05,684 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:05,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:05,697 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:05,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:05,967 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:05,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:05,974 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:10,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2159#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:10,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:10,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:45:10,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-04-02 14:45:10,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102966877] [2023-04-02 14:45:10,762 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:10,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:45:10,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:45:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=894, Unknown=2, NotChecked=0, Total=1056 [2023-04-02 14:45:10,763 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:14,753 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-04-02 14:45:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:45:14,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2023-04-02 14:45:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:14,755 INFO L225 Difference]: With dead ends: 65 [2023-04-02 14:45:14,755 INFO L226 Difference]: Without dead ends: 63 [2023-04-02 14:45:14,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=187, Invalid=1071, Unknown=2, NotChecked=0, Total=1260 [2023-04-02 14:45:14,757 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:14,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 6 Unknown, 0 Unchecked, 3.9s Time] [2023-04-02 14:45:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-02 14:45:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-04-02 14:45:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:45:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-02 14:45:14,780 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2023-04-02 14:45:14,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:14,780 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-02 14:45:14,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:45:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-02 14:45:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 14:45:14,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:14,781 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:14,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:45:14,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:14,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:14,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1129383956, now seen corresponding path program 6 times [2023-04-02 14:45:14,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804834688] [2023-04-02 14:45:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:14,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:15,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995224480] [2023-04-02 14:45:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:45:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:15,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:15,038 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 14:45:15,043 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 14:45:15,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:45:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:15,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:45:15,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:45:15,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:45:15,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:15,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804834688] [2023-04-02 14:45:15,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:15,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995224480] [2023-04-02 14:45:15,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995224480] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:15,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130487028] [2023-04-02 14:45:15,907 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:15,907 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:15,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:15,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:15,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:15,932 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:16,253 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:16,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:16,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:16,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:17,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2784#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:17,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:17,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 14:45:17,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81423484] [2023-04-02 14:45:17,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 14:45:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 14:45:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=2901, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 14:45:17,042 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:18,962 INFO L93 Difference]: Finished difference Result 242 states and 309 transitions. [2023-04-02 14:45:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 14:45:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2023-04-02 14:45:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:18,968 INFO L225 Difference]: With dead ends: 242 [2023-04-02 14:45:18,968 INFO L226 Difference]: Without dead ends: 213 [2023-04-02 14:45:18,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2409, Invalid=5247, Unknown=0, NotChecked=0, Total=7656 [2023-04-02 14:45:18,970 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 265 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:18,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 38 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 14:45:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-04-02 14:45:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 85. [2023-04-02 14:45:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:45:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-04-02 14:45:19,017 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 58 [2023-04-02 14:45:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:19,018 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-04-02 14:45:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-04-02 14:45:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 14:45:19,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:19,021 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:19,035 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 14:45:19,227 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,SelfDestructingSolverStorable7 [2023-04-02 14:45:19,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:19,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1330091500, now seen corresponding path program 7 times [2023-04-02 14:45:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121044097] [2023-04-02 14:45:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:19,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654834756] [2023-04-02 14:45:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:45:19,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:19,274 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 14:45:19,275 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 14:45:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:45:19,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 14:45:19,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:45:20,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:45:21,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121044097] [2023-04-02 14:45:21,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654834756] [2023-04-02 14:45:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654834756] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127397009] [2023-04-02 14:45:21,804 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:21,804 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:21,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:21,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:21,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:21,832 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:22,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:22,114 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:22,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:22,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:23,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3986#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:23,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:23,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-02 14:45:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216856593] [2023-04-02 14:45:23,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:23,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 14:45:23,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 14:45:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4739, Invalid=7917, Unknown=0, NotChecked=0, Total=12656 [2023-04-02 14:45:23,218 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:29,308 INFO L93 Difference]: Finished difference Result 434 states and 573 transitions. [2023-04-02 14:45:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 14:45:29,316 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2023-04-02 14:45:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:29,321 INFO L225 Difference]: With dead ends: 434 [2023-04-02 14:45:29,322 INFO L226 Difference]: Without dead ends: 405 [2023-04-02 14:45:29,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7170 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9345, Invalid=16095, Unknown=0, NotChecked=0, Total=25440 [2023-04-02 14:45:29,329 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 561 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:29,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 50 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 14:45:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-04-02 14:45:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 133. [2023-04-02 14:45:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 120 states have internal predecessors, (121), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:45:29,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-04-02 14:45:29,397 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 82 [2023-04-02 14:45:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:29,397 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-04-02 14:45:29,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 98 states have internal predecessors, (112), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:45:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-04-02 14:45:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-04-02 14:45:29,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:29,398 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:29,407 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 14:45:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:29,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:29,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1493881324, now seen corresponding path program 8 times [2023-04-02 14:45:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555978038] [2023-04-02 14:45:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:29,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470043985] [2023-04-02 14:45:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:45:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:29,696 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 14:45:29,698 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 14:45:30,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:45:30,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:30,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 14:45:30,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:31,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:45:31,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 99 [2023-04-02 14:45:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 208 refuted. 0 times theorem prover too weak. 4284 trivial. 0 not checked. [2023-04-02 14:45:31,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:31,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555978038] [2023-04-02 14:45:31,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470043985] [2023-04-02 14:45:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470043985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:45:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220339239] [2023-04-02 14:45:31,930 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:31,930 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:31,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:31,930 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:31,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:31,941 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:32,178 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:32,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:32,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:32,192 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:39,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5508#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:39,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:39,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:45:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 14:45:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154477837] [2023-04-02 14:45:39,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:45:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:45:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=953, Unknown=3, NotChecked=0, Total=1122 [2023-04-02 14:45:39,039 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:45:45,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-04-02 14:45:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:45:50,238 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-04-02 14:45:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 14:45:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 130 [2023-04-02 14:45:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:45:50,239 INFO L225 Difference]: With dead ends: 144 [2023-04-02 14:45:50,239 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 14:45:50,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=217, Invalid=1261, Unknown=4, NotChecked=0, Total=1482 [2023-04-02 14:45:50,240 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:45:50,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 74 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 212 Invalid, 11 Unknown, 0 Unchecked, 9.0s Time] [2023-04-02 14:45:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 14:45:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-04-02 14:45:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 125 states have internal predecessors, (126), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:45:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-04-02 14:45:50,277 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 130 [2023-04-02 14:45:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:45:50,277 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-04-02 14:45:50,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:45:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-04-02 14:45:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-02 14:45:50,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:45:50,278 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:45:50,285 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 14:45:50,485 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,SelfDestructingSolverStorable9 [2023-04-02 14:45:50,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:45:50,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:45:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1196694914, now seen corresponding path program 9 times [2023-04-02 14:45:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:45:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572989451] [2023-04-02 14:45:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:45:50,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:45:50,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:45:50,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484745006] [2023-04-02 14:45:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:45:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:45:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:45:50,533 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 14:45:50,535 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 14:45:50,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:45:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:45:50,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-02 14:45:50,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:45:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:45:53,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:45:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:45:58,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:45:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572989451] [2023-04-02 14:45:58,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:45:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484745006] [2023-04-02 14:45:58,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484745006] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:45:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240444023] [2023-04-02 14:45:58,332 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:45:58,332 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:45:58,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:45:58,332 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:45:58,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:45:58,364 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:45:58,656 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:45:58,663 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:45:58,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:45:58,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:45:59,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7063#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:45:59,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:45:59,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:45:59,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-02 14:45:59,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145116735] [2023-04-02 14:45:59,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:45:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-02 14:45:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:45:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-02 14:45:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18611, Invalid=24861, Unknown=0, NotChecked=0, Total=43472 [2023-04-02 14:45:59,837 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:46:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:46:24,705 INFO L93 Difference]: Finished difference Result 829 states and 1111 transitions. [2023-04-02 14:46:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-02 14:46:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 137 [2023-04-02 14:46:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:46:24,718 INFO L225 Difference]: With dead ends: 829 [2023-04-02 14:46:24,718 INFO L226 Difference]: Without dead ends: 793 [2023-04-02 14:46:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23586 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=37041, Invalid=55071, Unknown=0, NotChecked=0, Total=92112 [2023-04-02 14:46:24,724 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1618 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 2222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2222 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:46:24,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 31 Invalid, 3012 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2222 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-04-02 14:46:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-04-02 14:46:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 236. [2023-04-02 14:46:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 220 states have (on average 1.009090909090909) internal successors, (222), 221 states have internal predecessors, (222), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 14:46:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2023-04-02 14:46:24,874 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 137 [2023-04-02 14:46:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:46:24,875 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2023-04-02 14:46:24,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0721649484536082) internal successors, (208), 194 states have internal predecessors, (208), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 14:46:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2023-04-02 14:46:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-04-02 14:46:24,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:46:24,877 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:46:24,886 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 14:46:25,089 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,SelfDestructingSolverStorable10 [2023-04-02 14:46:25,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:46:25,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:46:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1809421698, now seen corresponding path program 10 times [2023-04-02 14:46:25,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:46:25,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845754915] [2023-04-02 14:46:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:46:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:46:25,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:46:25,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229247261] [2023-04-02 14:46:25,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:46:25,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:46:25,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:46:25,181 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:46:25,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:46:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:46:25,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 2234 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 14:46:25,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:46:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:46:35,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:46:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 8 proven. 18145 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:46:53,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:46:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845754915] [2023-04-02 14:46:53,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:46:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229247261] [2023-04-02 14:46:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229247261] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:46:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1206515009] [2023-04-02 14:46:53,871 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:46:53,871 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:46:53,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:46:53,872 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:46:53,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:46:53,887 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:46:54,139 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:46:54,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 51 for LOIs [2023-04-02 14:46:54,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:46:54,152 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:46:56,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10924#(and (<= 1 |#StackHeapBarrier|) (= ~N~0 1000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:46:56,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:46:56,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:46:56,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2023-04-02 14:46:56,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117272019] [2023-04-02 14:46:56,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:46:56,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-02 14:46:56,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:46:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-02 14:46:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74003, Invalid=86397, Unknown=0, NotChecked=0, Total=160400 [2023-04-02 14:46:56,435 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 386 states, 386 states have (on average 1.0362694300518134) internal successors, (400), 386 states have internal predecessors, (400), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6)