/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/nla-digbench-scaling/geo1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:00:58,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:00:58,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:00:58,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:00:58,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:00:58,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:00:58,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:00:58,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:00:58,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:00:58,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:00:58,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:00:58,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:00:58,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:00:58,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:00:58,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:00:58,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:00:58,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:00:58,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:00:58,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:00:58,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:00:58,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:00:58,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:00:58,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:00:58,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:00:58,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:00:58,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:00:58,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:00:58,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:00:58,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:00:58,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:00:58,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:00:58,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:00:58,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:00:58,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:00:58,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:00:58,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:00:58,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:00:58,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:00:58,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:00:58,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:00:58,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:00:58,135 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 23:00:58,162 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:00:58,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:00:58,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:00:58,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:00:58,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:00:58,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:00:58,164 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:00:58,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:00:58,165 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:00:58,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:00:58,165 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:00:58,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:00:58,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:00:58,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:00:58,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:00:58,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:00:58,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:00:58,169 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:00:58,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:00:58,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:00:58,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:00:58,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:00:58,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:00:58,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:00:58,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:00:58,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:00:58,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:00:58,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:00:58,435 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:00:58,436 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:00:58,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2023-04-02 23:00:59,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:00:59,823 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:00:59,823 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2023-04-02 23:00:59,828 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61bdff898/b69561e8145841189489b9d024cec35e/FLAG930c58cad [2023-04-02 23:00:59,841 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61bdff898/b69561e8145841189489b9d024cec35e [2023-04-02 23:00:59,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:00:59,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:00:59,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:00:59,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:00:59,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:00:59,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:00:59" (1/1) ... [2023-04-02 23:00:59,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1b58bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:00:59, skipping insertion in model container [2023-04-02 23:00:59,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:00:59" (1/1) ... [2023-04-02 23:00:59,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:00:59,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:00:59,994 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/nla-digbench-scaling/geo1-ll_unwindbound20.c[546,559] [2023-04-02 23:01:00,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:01:00,018 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:01:00,028 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/nla-digbench-scaling/geo1-ll_unwindbound20.c[546,559] [2023-04-02 23:01:00,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:01:00,049 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:01:00,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00 WrapperNode [2023-04-02 23:01:00,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:01:00,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:01:00,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:01:00,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:01:00,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:01:00,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:01:00,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:01:00,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:01:00,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (1/1) ... [2023-04-02 23:01:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:01:00,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:00,125 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 23:01:00,127 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 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:01:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:01:00,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:01:00,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:01:00,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:01:00,213 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:01:00,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:01:00,329 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:01:00,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:01:00,360 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:01:00,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:01:00 BoogieIcfgContainer [2023-04-02 23:01:00,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:01:00,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:01:00,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:01:00,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:01:00,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:00:59" (1/3) ... [2023-04-02 23:01:00,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c49dc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:01:00, skipping insertion in model container [2023-04-02 23:01:00,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:01:00" (2/3) ... [2023-04-02 23:01:00,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c49dc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:01:00, skipping insertion in model container [2023-04-02 23:01:00,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:01:00" (3/3) ... [2023-04-02 23:01:00,370 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2023-04-02 23:01:00,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:01:00,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:01:00,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:01:00,433 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;@64475ef8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:01:00,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:01:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:01:00,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 23:01:00,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:00,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:01:00,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:00,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -984169409, now seen corresponding path program 1 times [2023-04-02 23:01:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702412589] [2023-04-02 23:01:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:00,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100288248] [2023-04-02 23:01:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:00,607 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 23:01:00,609 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 23:01:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:00,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:01:00,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:01:00,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:01:00,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702412589] [2023-04-02 23:01:00,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:00,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100288248] [2023-04-02 23:01:00,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100288248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:01:00,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:01:00,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:01:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941150580] [2023-04-02 23:01:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:01:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:01:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:00,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:01:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:01:00,915 INFO L87 Difference]: Start difference. First operand has 26 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 23:01:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:01,040 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-04-02 23:01:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:01:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-04-02 23:01:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:01,051 INFO L225 Difference]: With dead ends: 51 [2023-04-02 23:01:01,051 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 23:01:01,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:01:01,061 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:01,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:01:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 23:01:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-02 23:01:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:01:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-02 23:01:01,105 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2023-04-02 23:01:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:01,106 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-02 23:01:01,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 23:01:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-02 23:01:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 23:01:01,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:01,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:01:01,118 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 23:01:01,313 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 23:01:01,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:01,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:01,314 INFO L85 PathProgramCache]: Analyzing trace with hash -523399864, now seen corresponding path program 1 times [2023-04-02 23:01:01,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:01,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086342508] [2023-04-02 23:01:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:01,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:01,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:01,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427596056] [2023-04-02 23:01:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:01,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:01,341 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 23:01:01,345 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 23:01:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:01,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:01:01,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:01,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:01:01,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:01,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086342508] [2023-04-02 23:01:01,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:01,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427596056] [2023-04-02 23:01:01,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427596056] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:01:01,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:01:01,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:01:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694994204] [2023-04-02 23:01:01,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:01:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:01:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:01:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:01:01,437 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:01:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:01,451 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-04-02 23:01:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:01:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-02 23:01:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:01,453 INFO L225 Difference]: With dead ends: 37 [2023-04-02 23:01:01,453 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 23:01:01,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:01:01,455 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:01,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:01:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 23:01:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 23:01:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:01:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-02 23:01:01,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2023-04-02 23:01:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:01,462 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-02 23:01:01,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:01:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-02 23:01:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 23:01:01,463 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:01,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:01:01,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:01:01,673 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 23:01:01,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:01,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1114401646, now seen corresponding path program 1 times [2023-04-02 23:01:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:01,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535428902] [2023-04-02 23:01:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:01,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725060861] [2023-04-02 23:01:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:01,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:01:01,711 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 23:01:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:01,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:01:01,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:01,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:01:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:02,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:02,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535428902] [2023-04-02 23:01:02,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:02,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725060861] [2023-04-02 23:01:02,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725060861] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:01:02,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31427429] [2023-04-02 23:01:02,048 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 23:01:02,051 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:01:02,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:01:02,058 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:01:02,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:01:02,162 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:01:02,447 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 23:01:02,453 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:01:02,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:01:02,465 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:01:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [31427429] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:01:02,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:01:02,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [8, 7] total 26 [2023-04-02 23:01:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952560919] [2023-04-02 23:01:02,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:01:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 23:01:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 23:01:02,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:01:02,940 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:01:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:03,670 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-04-02 23:01:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:01:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-04-02 23:01:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:03,672 INFO L225 Difference]: With dead ends: 38 [2023-04-02 23:01:03,672 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 23:01:03,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 23:01:03,673 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:03,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:01:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 23:01:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 23:01:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:01:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 23:01:03,681 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-04-02 23:01:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:03,682 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 23:01:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:01:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 23:01:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 23:01:03,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:03,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:01:03,691 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 23:01:03,883 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 23:01:03,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:03,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:03,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1126054650, now seen corresponding path program 1 times [2023-04-02 23:01:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:03,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459419661] [2023-04-02 23:01:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:03,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:03,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:03,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739462551] [2023-04-02 23:01:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:03,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:03,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:03,914 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 23:01:03,922 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 23:01:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:03,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 23:01:03,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:01:04,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:01:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:04,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459419661] [2023-04-02 23:01:04,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739462551] [2023-04-02 23:01:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739462551] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:01:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002691282] [2023-04-02 23:01:04,307 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:01:04,308 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:01:04,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:01:04,308 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:01:04,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:01:04,335 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:01:04,991 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 58 for LOIs [2023-04-02 23:01:05,052 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:01:05,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:01:05,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:01:06,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '808#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 2147483647) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:01:06,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:01:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:01:06,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-04-02 23:01:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675370409] [2023-04-02 23:01:06,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:01:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:01:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:01:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:01:06,151 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 23:01:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:06,440 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-04-02 23:01:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:01:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2023-04-02 23:01:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:06,441 INFO L225 Difference]: With dead ends: 41 [2023-04-02 23:01:06,441 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 23:01:06,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 23:01:06,443 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:06,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 107 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:01:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 23:01:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-04-02 23:01:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:01:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-02 23:01:06,455 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2023-04-02 23:01:06,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:06,455 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-02 23:01:06,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 23:01:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-02 23:01:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 23:01:06,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:06,456 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, 1, 1, 1, 1] [2023-04-02 23:01:06,464 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 23:01:06,656 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 23:01:06,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:06,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash 469036525, now seen corresponding path program 1 times [2023-04-02 23:01:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883591245] [2023-04-02 23:01:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:06,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384725625] [2023-04-02 23:01:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:06,671 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 23:01:06,674 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 23:01:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:06,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:01:06,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:06,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:01:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:06,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883591245] [2023-04-02 23:01:06,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384725625] [2023-04-02 23:01:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384725625] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:01:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426097397] [2023-04-02 23:01:06,808 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 23:01:06,808 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:01:06,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:01:06,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:01:06,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:01:06,854 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:01:07,406 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-04-02 23:01:07,426 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:01:07,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:01:07,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:01:08,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1105#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 2147483647) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:01:08,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:01:08,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:01:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:01:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975133474] [2023-04-02 23:01:08,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:01:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:01:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:01:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:01:08,298 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 23:01:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:08,364 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-04-02 23:01:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:01:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 27 [2023-04-02 23:01:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:08,365 INFO L225 Difference]: With dead ends: 68 [2023-04-02 23:01:08,365 INFO L226 Difference]: Without dead ends: 62 [2023-04-02 23:01:08,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-04-02 23:01:08,367 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:08,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:01:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-02 23:01:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2023-04-02 23:01:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:01:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-04-02 23:01:08,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 27 [2023-04-02 23:01:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:08,386 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-04-02 23:01:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 23:01:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-04-02 23:01:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 23:01:08,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:01:08,388 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:01:08,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 23:01:08,593 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 23:01:08,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:01:08,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:01:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash 773268855, now seen corresponding path program 1 times [2023-04-02 23:01:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:01:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859342479] [2023-04-02 23:01:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:01:08,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:01:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749084454] [2023-04-02 23:01:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:01:08,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:01:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:01:08,611 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 23:01:08,613 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 23:01:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:01:08,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 23:01:08,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:01:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:01:08,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:01:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:01:08,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:01:08,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859342479] [2023-04-02 23:01:08,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:01:08,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749084454] [2023-04-02 23:01:08,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749084454] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:01:08,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223382097] [2023-04-02 23:01:08,851 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 23:01:08,851 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:01:08,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:01:08,851 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:01:08,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:01:08,870 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:01:09,361 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2023-04-02 23:01:09,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-02 23:01:09,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:01:09,372 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:01:10,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 2147483647) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:01:10,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:01:10,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:01:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2023-04-02 23:01:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580281306] [2023-04-02 23:01:10,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:01:10,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:01:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:01:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:01:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-04-02 23:01:10,377 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 23:01:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:01:10,534 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-04-02 23:01:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:01:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-04-02 23:01:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:01:10,535 INFO L225 Difference]: With dead ends: 50 [2023-04-02 23:01:10,535 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:01:10,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 23:01:10,536 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:01:10,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 71 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:01:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:01:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:01:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 23:01:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:01:10,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2023-04-02 23:01:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:01:10,538 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:01:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 23:01:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:01:10,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:01:10,540 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:01:10,546 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 23:01:10,746 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 23:01:10,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:01:11,268 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2023-04-02 23:01:11,268 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 9) no Hoare annotation was computed. [2023-04-02 23:01:11,268 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 14) the Hoare annotation is: true [2023-04-02 23:01:11,268 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2023-04-02 23:01:11,268 INFO L895 garLoopResultBuilder]: At program point L35-3(lines 35 45) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= (+ (* main_~z~0 main_~x~0) 1) (+ main_~y~0 main_~x~0)) (<= 1 main_~c~0) (<= 1 main_~k~0)) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:01:11,269 INFO L899 garLoopResultBuilder]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2023-04-02 23:01:11,269 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2023-04-02 23:01:11,269 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2023-04-02 23:01:11,269 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 51) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (= ~counter~0 0) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:01:11,269 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= (+ (* main_~z~0 main_~x~0) 1) (+ main_~y~0 main_~x~0)) (<= 1 main_~c~0) (<= 1 main_~k~0)) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:01:11,269 INFO L899 garLoopResultBuilder]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2023-04-02 23:01:11,269 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (and (<= 0 (+ main_~z~0 2147483648)) (<= main_~z~0 2147483647) (= ~counter~0 0) (<= 0 (+ main_~k~0 2147483648)) (<= main_~k~0 2147483647)))) [2023-04-02 23:01:11,269 INFO L895 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (and (<= main_~z~0 2147483647) (= ~counter~0 0) (<= 1 main_~z~0) (<= 0 (+ main_~k~0 2147483648)) (<= main_~k~0 2147483647)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:01:11,270 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (and (<= 1 main_~c~0) (<= 1 main_~k~0) (= (+ main_~x~0 1) main_~y~0)) (not (= 10 (select |#length| 2))) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point L49-1(line 49) no Hoare annotation was computed. [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2023-04-02 23:01:11,270 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:01:11,270 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= ~counter~0 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= 10 (select |#length| 2)) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:01:11,270 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:01:11,270 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2023-04-02 23:01:11,271 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2023-04-02 23:01:11,271 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2023-04-02 23:01:11,271 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2023-04-02 23:01:11,271 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 21) the Hoare annotation is: true [2023-04-02 23:01:11,271 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2023-04-02 23:01:11,273 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-04-02 23:01:11,275 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:01:11,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:01:11 BoogieIcfgContainer [2023-04-02 23:01:11,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:01:11,289 INFO L158 Benchmark]: Toolchain (without parser) took 11444.94ms. Allocated memory was 275.8MB in the beginning and 398.5MB in the end (delta: 122.7MB). Free memory was 223.5MB in the beginning and 276.6MB in the end (delta: -53.1MB). Peak memory consumption was 70.7MB. Max. memory is 8.0GB. [2023-04-02 23:01:11,290 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 130.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:01:11,290 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.51ms. Allocated memory is still 275.8MB. Free memory was 223.0MB in the beginning and 213.0MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-02 23:01:11,290 INFO L158 Benchmark]: Boogie Preprocessor took 42.49ms. Allocated memory is still 275.8MB. Free memory was 213.0MB in the beginning and 211.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 23:01:11,290 INFO L158 Benchmark]: RCFGBuilder took 268.40ms. Allocated memory is still 275.8MB. Free memory was 211.4MB in the beginning and 198.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 23:01:11,291 INFO L158 Benchmark]: TraceAbstraction took 10924.75ms. Allocated memory was 275.8MB in the beginning and 398.5MB in the end (delta: 122.7MB). Free memory was 198.3MB in the beginning and 276.6MB in the end (delta: -78.2MB). Peak memory consumption was 45.5MB. Max. memory is 8.0GB. [2023-04-02 23:01:11,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 130.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 204.51ms. Allocated memory is still 275.8MB. Free memory was 223.0MB in the beginning and 213.0MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.49ms. Allocated memory is still 275.8MB. Free memory was 213.0MB in the beginning and 211.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.40ms. Allocated memory is still 275.8MB. Free memory was 211.4MB in the beginning and 198.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 10924.75ms. Allocated memory was 275.8MB in the beginning and 398.5MB in the end (delta: 122.7MB). Free memory was 198.3MB in the beginning and 276.6MB in the end (delta: -78.2MB). Peak memory consumption was 45.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 408 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 311 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 447 IncrementalHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 97 mSDtfsCounter, 447 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 21 PreInvPairs, 32 NumberOfFragments, 604 HoareAnnotationTreeSize, 21 FomulaSimplifications, 265 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 249 ConstructedInterpolants, 2 QuantifiedInterpolants, 714 SizeOfPredicates, 18 NumberOfNonLiveVariables, 619 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 49/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 22, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 17, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 14, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 39, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 62, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 22, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 186, DAG_COMPRESSION_RETAINED_NODES: 70, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((!(unknown-#memory_int-unknown[1][0] == 48) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || ((z * x + 1 == y + x && 1 <= c) && 1 <= k)) || !(\valid[3] == 1)) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(#NULL == 0)) || !(\old(counter) == 0)) || !(10 == unknown-#length-unknown[2])) || !(\valid[2] == 1)) || unknown-#StackHeapBarrier-unknown <= 0 RESULT: Ultimate proved your program to be correct! [2023-04-02 23:01:11,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...