/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 EqDomain -i ../sv-benchmarks/c/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:05:03,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:05:03,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:05:03,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:05:03,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:05:03,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:05:03,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:05:03,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:05:03,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:05:03,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:05:03,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:05:03,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:05:03,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:05:03,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:05:03,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:05:03,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:05:03,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:05:03,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:05:03,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:05:03,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:05:03,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:05:03,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:05:03,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:05:03,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:05:03,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:05:03,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:05:03,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:05:03,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:05:03,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:05:03,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:05:03,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:05:03,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:05:03,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:05:03,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:05:03,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:05:03,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:05:03,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:05:03,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:05:03,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:05:03,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:05:03,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:05:03,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:05:03,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:05:03,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:05:03,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:05:03,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:05:03,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:05:03,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:05:03,213 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:05:03,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:05:03,214 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:05:03,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:05:03,214 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:05:03,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:05:03,215 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:05:03,215 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:05:03,215 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:05:03,215 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:05:03,215 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:05:03,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:05:03,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:05:03,216 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:05:03,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:05:03,217 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:05:03,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:05:03,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:05:03,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:05:03,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:05:03,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:05:03,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:05:03,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:05:03,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:05:03,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:05:03,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:05:03,420 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:05:03,420 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:05:03,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2023-04-01 09:05:04,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:05:04,538 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:05:04,539 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2023-04-01 09:05:04,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e0e4f1d8/1220fb8355fb410d87daab305936b950/FLAG6481e967b [2023-04-01 09:05:04,553 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e0e4f1d8/1220fb8355fb410d87daab305936b950 [2023-04-01 09:05:04,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:05:04,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:05:04,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:05:04,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:05:04,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:05:04,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a61c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04, skipping insertion in model container [2023-04-01 09:05:04,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:05:04,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:05:04,672 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2023-04-01 09:05:04,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:05:04,692 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:05:04,700 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2023-04-01 09:05:04,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:05:04,717 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:05:04,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04 WrapperNode [2023-04-01 09:05:04,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:05:04,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:05:04,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:05:04,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:05:04,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:05:04,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:05:04,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:05:04,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:05:04,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (1/1) ... [2023-04-01 09:05:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:05:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:04,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:05:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:05:04,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:05:04,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:05:04,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:05:04,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:05:04,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:05:04,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:05:04,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:05:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:05:04,886 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:05:04,888 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:05:05,084 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:05:05,124 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:05:05,124 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 09:05:05,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:05:05 BoogieIcfgContainer [2023-04-01 09:05:05,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:05:05,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:05:05,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:05:05,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:05:05,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:05:04" (1/3) ... [2023-04-01 09:05:05,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1cd7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:05:05, skipping insertion in model container [2023-04-01 09:05:05,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:05:04" (2/3) ... [2023-04-01 09:05:05,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1cd7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:05:05, skipping insertion in model container [2023-04-01 09:05:05,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:05:05" (3/3) ... [2023-04-01 09:05:05,131 INFO L112 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2023-04-01 09:05:05,147 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:05:05,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:05:05,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:05:05,181 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;@5d84a4b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:05:05,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:05:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:05:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:05:05,189 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:05,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:05:05,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:05,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash -333657043, now seen corresponding path program 1 times [2023-04-01 09:05:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:05,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683037549] [2023-04-01 09:05:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:05,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:05,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288191572] [2023-04-01 09:05:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:05,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:05:05,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:05:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:05:05,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:05:05,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:05:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:05:05,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:05:05,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:05:05,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683037549] [2023-04-01 09:05:05,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:05:05,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288191572] [2023-04-01 09:05:05,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288191572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:05:05,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:05:05,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:05:05,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685280762] [2023-04-01 09:05:05,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:05:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:05:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:05:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:05:05,502 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:05:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:05,574 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-04-01 09:05:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:05:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 09:05:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:05,580 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:05:05,580 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 09:05:05,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:05:05,584 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:05,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:05:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 09:05:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-01 09:05:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:05:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 09:05:05,609 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2023-04-01 09:05:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:05,609 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 09:05:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:05:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 09:05:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:05:05,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:05,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:05:05,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:05,810 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 [2023-04-01 09:05:05,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:05,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 231064878, now seen corresponding path program 1 times [2023-04-01 09:05:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:05,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450140554] [2023-04-01 09:05:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:05,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155421725] [2023-04-01 09:05:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:05,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:05,844 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) [2023-04-01 09:05:05,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:05:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:05:05,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 09:05:05,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:05:06,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:05:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:05:06,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:05:06,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:05:06,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 09:05:06,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:05:06,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:05:06,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 09:05:06,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 09:05:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:05:06,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:05:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450140554] [2023-04-01 09:05:06,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:05:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155421725] [2023-04-01 09:05:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155421725] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:05:06,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206401326] [2023-04-01 09:05:06,308 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:05:06,309 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:05:06,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:05:06,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:05:06,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:05:06,457 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:05:07,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 09:05:07,695 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:05:07,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:07,703 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:05:08,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (exists ((v_main_~c~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_1) 0) 0)) (not (= v_main_~c~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= v_main_~c~0.base_BEFORE_CALL_1 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int)))) (and (= (select |v_old(#length)_BEFORE_CALL_3| 2) 10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| v_main_~a~0.base_BEFORE_CALL_1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:05:08,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:05:08,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:05:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 09:05:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792887268] [2023-04-01 09:05:08,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:05:08,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 09:05:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 09:05:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2023-04-01 09:05:08,941 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:05:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:09,079 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-04-01 09:05:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 09:05:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (5), 3 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 21 [2023-04-01 09:05:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:09,080 INFO L225 Difference]: With dead ends: 34 [2023-04-01 09:05:09,080 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 09:05:09,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:05:09,082 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:09,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:05:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 09:05:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 09:05:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:05:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-04-01 09:05:09,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2023-04-01 09:05:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:09,086 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-04-01 09:05:09,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:05:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-04-01 09:05:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:05:09,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:09,087 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, 1] [2023-04-01 09:05:09,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:09,292 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 [2023-04-01 09:05:09,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:09,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1026026707, now seen corresponding path program 1 times [2023-04-01 09:05:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332259962] [2023-04-01 09:05:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:09,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:09,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343112921] [2023-04-01 09:05:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:09,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:09,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:09,322 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) [2023-04-01 09:05:09,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:05:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:05:09,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:05:09,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:05:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:05:09,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:05:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:05:09,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:05:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332259962] [2023-04-01 09:05:09,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:05:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343112921] [2023-04-01 09:05:09,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343112921] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:05:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872613956] [2023-04-01 09:05:09,475 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:05:09,475 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:05:09,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:05:09,476 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:05:09,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:05:09,507 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:05:10,817 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:05:11,000 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:05:11,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:11,023 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:05:12,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~c~0.offset_BEFORE_CALL_12 Int) (v_main_~a~0.base_BEFORE_CALL_12 Int) (|v_old(~N~0)_BEFORE_CALL_17| Int) (v_main_~a~0.offset_BEFORE_CALL_12 Int) (|v_old(#length)_BEFORE_CALL_17| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_15 Int) (v_main_~b~0.base_BEFORE_CALL_12 Int) (v_main_~b~0.offset_BEFORE_CALL_12 Int) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_17| (Array Int Int)) (v_main_~c~0.base_BEFORE_CALL_12 Int) (|v_main_#t~mem17_BEFORE_CALL_13| Int)) (and (not (= |v_main_#t~mem17_BEFORE_CALL_13| (* v_main_~i~0_BEFORE_CALL_15 v_main_~i~0_BEFORE_CALL_15 v_main_~i~0_BEFORE_CALL_15))) (or (and (= v_main_~i~0_BEFORE_CALL_15 0) (= v_main_~c~0.offset_BEFORE_CALL_12 0) (= (select |v_old(#valid)_BEFORE_CALL_17| v_main_~a~0.base_BEFORE_CALL_12) 0) (not (= v_main_~a~0.base_BEFORE_CALL_12 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_12 2)) (= (select |v_old(#length)_BEFORE_CALL_17| 2) 10) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_17| 1) 1) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_12)) (= |v_main_#t~mem17_BEFORE_CALL_13| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_12) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_12 1)) (= (select |v_old(#length)_BEFORE_CALL_17| 3) 12) (= |v_old(~N~0)_BEFORE_CALL_17| 0) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_12)) (= v_main_~b~0.offset_BEFORE_CALL_12 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_12 3)) (not (= |v_old(#valid)_BEFORE_CALL_17| |v_old(#length)_BEFORE_CALL_17|)) (not (= v_main_~b~0.base_BEFORE_CALL_12 0)) (= v_main_~a~0.offset_BEFORE_CALL_12 0) (not (= v_main_~c~0.base_BEFORE_CALL_12 0)) (= (select |v_old(#length)_BEFORE_CALL_17| 1) 2) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_17| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_12 0)) (not (= |v_old(#valid)_BEFORE_CALL_17| (select |v_old(#memory_int)_BEFORE_CALL_17| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)) (= (select |v_old(#valid)_BEFORE_CALL_17| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) |v_old(#length)_BEFORE_CALL_17|)) (= (select |v_old(#valid)_BEFORE_CALL_17| 3) 1) (= |#NULL.base| 0)) (and (not (= v_main_~i~0_BEFORE_CALL_15 ~N~0)) (= v_main_~c~0.offset_BEFORE_CALL_12 0) (= (select |v_old(#valid)_BEFORE_CALL_17| v_main_~a~0.base_BEFORE_CALL_12) 0) (not (= v_main_~a~0.base_BEFORE_CALL_12 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_12 2)) (= (select |v_old(#length)_BEFORE_CALL_17| 2) 10) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_17| 1) 1) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_12)) (not (= v_main_~a~0.base_BEFORE_CALL_12 1)) (= (select |v_old(#length)_BEFORE_CALL_17| 3) 12) (= |v_old(~N~0)_BEFORE_CALL_17| 0) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_12)) (= v_main_~b~0.offset_BEFORE_CALL_12 0) (= |v_main_#t~mem17_BEFORE_CALL_13| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_12) (* v_main_~i~0_BEFORE_CALL_15 8))) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_12 3)) (not (= |v_old(#valid)_BEFORE_CALL_17| |v_old(#length)_BEFORE_CALL_17|)) (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_12) 0) 0) (not (= v_main_~b~0.base_BEFORE_CALL_12 0)) (= v_main_~a~0.offset_BEFORE_CALL_12 0) (not (= v_main_~c~0.base_BEFORE_CALL_12 0)) (= (select |v_old(#length)_BEFORE_CALL_17| 1) 2) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_17| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_12))) (not (= v_main_~a~0.base_BEFORE_CALL_12 0)) (not (= |v_old(#valid)_BEFORE_CALL_17| (select |v_old(#memory_int)_BEFORE_CALL_17| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)) (= (select |v_old(#valid)_BEFORE_CALL_17| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) |v_old(#length)_BEFORE_CALL_17|)) (= (select |v_old(#valid)_BEFORE_CALL_17| 3) 1) (= |#NULL.base| 0))))))' at error location [2023-04-01 09:05:12,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:05:12,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:05:12,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:05:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723794701] [2023-04-01 09:05:12,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:05:12,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:05:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:12,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:05:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=579, Unknown=5, NotChecked=0, Total=650 [2023-04-01 09:05:12,533 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:05:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:12,665 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-04-01 09:05:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:05:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-04-01 09:05:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:12,666 INFO L225 Difference]: With dead ends: 68 [2023-04-01 09:05:12,666 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 09:05:12,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=81, Invalid=670, Unknown=5, NotChecked=0, Total=756 [2023-04-01 09:05:12,668 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:12,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:05:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 09:05:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-04-01 09:05:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:05:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-04-01 09:05:12,672 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2023-04-01 09:05:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:12,672 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-04-01 09:05:12,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:05:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-04-01 09:05:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 09:05:12,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:12,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:05:12,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:12,875 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 [2023-04-01 09:05:12,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:12,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:12,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1770007380, now seen corresponding path program 2 times [2023-04-01 09:05:12,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:12,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640078427] [2023-04-01 09:05:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:12,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:12,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532172270] [2023-04-01 09:05:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:05:12,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:12,903 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) [2023-04-01 09:05:12,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:05:12,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:05:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:05:12,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 09:05:12,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:05:12,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2023-04-01 09:05:13,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:05:13,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:05:13,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 09:05:13,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:05:13,137 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:05:13,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:05:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:05:13,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:05:13,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 09:05:13,463 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_main_~i~0 0))) (and (or (not .cse0) (= (select (select (store |c_#memory_int| c_main_~c~0.base (store (select |c_#memory_int| c_main_~c~0.base) c_main_~c~0.offset 0)) c_main_~b~0.base) c_main_~b~0.offset) 1)) (or .cse0 (and (not (= (+ c_main_~i~0 1) 0)) (forall ((v_ArrVal_181 (Array Int Int))) (= (select (let ((.cse1 (* c_main_~i~0 8))) (store v_ArrVal_181 (+ c_main_~c~0.offset .cse1 8) (+ (select v_ArrVal_181 (+ c_main_~c~0.offset .cse1)) (select (select (store |c_#memory_int| c_main_~c~0.base v_ArrVal_181) c_main_~b~0.base) (+ .cse1 c_main_~b~0.offset))))) (+ c_main_~c~0.offset 8)) 1)))))) is different from false [2023-04-01 09:05:13,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:05:13,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 09:05:13,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:05:13,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:05:13,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2023-04-01 09:05:13,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:05:13,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2023-04-01 09:05:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-04-01 09:05:13,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:05:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640078427] [2023-04-01 09:05:13,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:05:13,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532172270] [2023-04-01 09:05:13,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532172270] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:05:13,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098715240] [2023-04-01 09:05:13,724 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:05:13,724 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:05:13,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:05:13,724 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:05:13,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:05:13,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:05:14,901 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:05:15,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:05:15,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:15,079 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:05:16,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1025#(and (exists ((|v_old(#valid)_BEFORE_CALL_31| (Array Int Int)) (v_main_~c~0.offset_BEFORE_CALL_25 Int) (v_main_~a~0.base_BEFORE_CALL_23 Int) (v_main_~a~0.offset_BEFORE_CALL_23 Int) (|v_old(~N~0)_BEFORE_CALL_31| Int) (v_main_~i~0_BEFORE_CALL_29 Int) (|v_old(#memory_int)_BEFORE_CALL_31| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_31| (Array Int Int)) (|v_main_#t~mem17_BEFORE_CALL_25| Int) (v_main_~b~0.base_BEFORE_CALL_23 Int) (v_main_~b~0.offset_BEFORE_CALL_23 Int) (v_main_~c~0.base_BEFORE_CALL_25 Int)) (and (not (= (* v_main_~i~0_BEFORE_CALL_29 v_main_~i~0_BEFORE_CALL_29 v_main_~i~0_BEFORE_CALL_29) |v_main_#t~mem17_BEFORE_CALL_25|)) (or (and (not (= v_main_~a~0.base_BEFORE_CALL_23 3)) (not (= v_main_~a~0.base_BEFORE_CALL_23 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_23)) (= (select |v_old(#valid)_BEFORE_CALL_31| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_23 0)) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_25)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_31| 1) 2) (= |v_old(~N~0)_BEFORE_CALL_31| 0) (not (= v_main_~b~0.base_BEFORE_CALL_23 0)) (not (= v_main_~a~0.base_BEFORE_CALL_23 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_31| (select |v_old(#memory_int)_BEFORE_CALL_31| 1))) (not (= v_main_~c~0.base_BEFORE_CALL_25 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| v_main_~a~0.base_BEFORE_CALL_23) 0) (= (select |v_old(#length)_BEFORE_CALL_31| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_31| 2) 1) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_31| |v_old(#length)_BEFORE_CALL_31|)) (not (= v_main_~a~0.base_BEFORE_CALL_23 2)) (= (select |v_old(#length)_BEFORE_CALL_31| 2) 10) (= v_main_~i~0_BEFORE_CALL_29 0) (= |v_main_#t~mem17_BEFORE_CALL_25| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_25) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_31| 1) |v_old(#length)_BEFORE_CALL_31|)) (= |#NULL.offset| 0) (= v_main_~a~0.offset_BEFORE_CALL_23 0) (= v_main_~c~0.offset_BEFORE_CALL_25 0) (= v_main_~b~0.offset_BEFORE_CALL_23 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| 1) 1) (= |#NULL.base| 0)) (and (not (= v_main_~a~0.base_BEFORE_CALL_23 3)) (not (= v_main_~a~0.base_BEFORE_CALL_23 1)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_23)) (= (select |v_old(#valid)_BEFORE_CALL_31| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_23 0)) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_25)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 1) 0) (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_25) (* v_main_~i~0_BEFORE_CALL_29 8)) |v_main_#t~mem17_BEFORE_CALL_25|) (= (select |v_old(#length)_BEFORE_CALL_31| 1) 2) (= |v_old(~N~0)_BEFORE_CALL_31| 0) (not (= v_main_~b~0.base_BEFORE_CALL_23 0)) (not (= v_main_~a~0.base_BEFORE_CALL_23 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_31| (select |v_old(#memory_int)_BEFORE_CALL_31| 1))) (not (= v_main_~c~0.base_BEFORE_CALL_25 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| v_main_~a~0.base_BEFORE_CALL_23) 0) (= (select |v_old(#length)_BEFORE_CALL_31| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_31| 2) 1) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| 3) 1) (not (= v_main_~i~0_BEFORE_CALL_29 ~N~0)) (not (= |v_old(#valid)_BEFORE_CALL_31| |v_old(#length)_BEFORE_CALL_31|)) (not (= v_main_~a~0.base_BEFORE_CALL_23 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_31| 1) (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_25))) (= (select |v_old(#length)_BEFORE_CALL_31| 2) 10) (not (= (select |v_old(#memory_int)_BEFORE_CALL_31| 1) |v_old(#length)_BEFORE_CALL_31|)) (= |#NULL.offset| 0) (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_25) 0) 0) (= v_main_~a~0.offset_BEFORE_CALL_23 0) (= v_main_~c~0.offset_BEFORE_CALL_25 0) (= v_main_~b~0.offset_BEFORE_CALL_23 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| 1) 1) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 09:05:16,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:05:16,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:05:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-04-01 09:05:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491884539] [2023-04-01 09:05:16,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:05:16,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 09:05:16,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 09:05:16,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1749, Unknown=6, NotChecked=84, Total=1980 [2023-04-01 09:05:16,936 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:05:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:17,418 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2023-04-01 09:05:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 09:05:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2023-04-01 09:05:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:17,419 INFO L225 Difference]: With dead ends: 44 [2023-04-01 09:05:17,419 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 09:05:17,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=238, Invalid=2412, Unknown=6, NotChecked=100, Total=2756 [2023-04-01 09:05:17,421 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:17,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 129 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 276 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2023-04-01 09:05:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 09:05:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-04-01 09:05:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:05:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-04-01 09:05:17,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2023-04-01 09:05:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:17,429 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-04-01 09:05:17,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:05:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-04-01 09:05:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 09:05:17,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:17,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:05:17,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:17,630 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 [2023-04-01 09:05:17,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:17,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1065054189, now seen corresponding path program 3 times [2023-04-01 09:05:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840828488] [2023-04-01 09:05:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:17,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239269520] [2023-04-01 09:05:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:05:17,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:17,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:17,649 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) [2023-04-01 09:05:17,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:05:17,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:05:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:05:17,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:05:17,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:05:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:05:17,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:05:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:05:17,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:05:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840828488] [2023-04-01 09:05:17,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:05:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239269520] [2023-04-01 09:05:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239269520] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:05:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363459509] [2023-04-01 09:05:17,794 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:05:17,794 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:05:17,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:05:17,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:05:17,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:05:17,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:05:18,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:05:18,985 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:05:18,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:18,996 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:05:20,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1430#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~c~0.offset_BEFORE_CALL_36 Int) (|v_old(#valid)_BEFORE_CALL_45| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_34 Int) (v_main_~a~0.offset_BEFORE_CALL_34 Int) (v_main_~i~0_BEFORE_CALL_44 Int) (|v_old(~N~0)_BEFORE_CALL_45| Int) (|v_old(#length)_BEFORE_CALL_45| (Array Int Int)) (|v_main_#t~mem17_BEFORE_CALL_36| Int) (|v_old(#memory_int)_BEFORE_CALL_45| (Array Int (Array Int Int))) (v_main_~b~0.base_BEFORE_CALL_34 Int) (v_main_~b~0.offset_BEFORE_CALL_34 Int) (v_main_~c~0.base_BEFORE_CALL_36 Int)) (and (or (and (= (select |v_old(#valid)_BEFORE_CALL_45| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_34 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_45| 3) 12) (= v_main_~b~0.offset_BEFORE_CALL_34 0) (not (= |v_old(#valid)_BEFORE_CALL_45| |v_old(#length)_BEFORE_CALL_45|)) (not (= v_main_~a~0.base_BEFORE_CALL_34 1)) (not (= v_main_~a~0.base_BEFORE_CALL_34 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (= |v_old(~N~0)_BEFORE_CALL_45| 0) (not (= v_main_~c~0.base_BEFORE_CALL_36 0)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_34)) (= 2 (select |v_old(#length)_BEFORE_CALL_45| 1)) (= v_main_~i~0_BEFORE_CALL_44 0) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_36)) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#length)_BEFORE_CALL_45| 2) 10) (= (select |v_old(#valid)_BEFORE_CALL_45| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_45| v_main_~a~0.base_BEFORE_CALL_34) 0) (= (select |v_old(#valid)_BEFORE_CALL_45| 3) 1) (= |#NULL.offset| 0) (= v_main_~a~0.offset_BEFORE_CALL_34 0) (= (select |v_old(#valid)_BEFORE_CALL_45| 0) 0) (not (= v_main_~b~0.base_BEFORE_CALL_34 0)) (= v_main_~c~0.offset_BEFORE_CALL_36 0) (not (= v_main_~a~0.base_BEFORE_CALL_34 2)) (not (= v_main_~a~0.base_BEFORE_CALL_34 |#StackHeapBarrier|)) (= |v_main_#t~mem17_BEFORE_CALL_36| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_36) 0)) (= |#NULL.base| 0)) (and (= (select |v_old(#valid)_BEFORE_CALL_45| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_34 3)) (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_36) 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_45| 3) 12) (= v_main_~b~0.offset_BEFORE_CALL_34 0) (= |v_main_#t~mem17_BEFORE_CALL_36| (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_36) (* v_main_~i~0_BEFORE_CALL_44 8))) (not (= |v_old(#valid)_BEFORE_CALL_45| |v_old(#length)_BEFORE_CALL_45|)) (not (= v_main_~a~0.base_BEFORE_CALL_34 1)) (not (= v_main_~a~0.base_BEFORE_CALL_34 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (= |v_old(~N~0)_BEFORE_CALL_45| 0) (not (= v_main_~c~0.base_BEFORE_CALL_36 0)) (not (= |#StackHeapBarrier| v_main_~b~0.base_BEFORE_CALL_34)) (= 2 (select |v_old(#length)_BEFORE_CALL_45| 1)) (not (= |#StackHeapBarrier| v_main_~c~0.base_BEFORE_CALL_36)) (not (= v_main_~i~0_BEFORE_CALL_44 ~N~0)) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#length)_BEFORE_CALL_45| 2) 10) (= (select |v_old(#valid)_BEFORE_CALL_45| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 1) 0) (not (= (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_36) (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (= (select |v_old(#valid)_BEFORE_CALL_45| v_main_~a~0.base_BEFORE_CALL_34) 0) (= (select |v_old(#valid)_BEFORE_CALL_45| 3) 1) (= |#NULL.offset| 0) (= v_main_~a~0.offset_BEFORE_CALL_34 0) (= (select |v_old(#valid)_BEFORE_CALL_45| 0) 0) (not (= v_main_~b~0.base_BEFORE_CALL_34 0)) (= v_main_~c~0.offset_BEFORE_CALL_36 0) (not (= v_main_~a~0.base_BEFORE_CALL_34 2)) (not (= v_main_~a~0.base_BEFORE_CALL_34 |#StackHeapBarrier|)) (= |#NULL.base| 0))) (not (= |v_main_#t~mem17_BEFORE_CALL_36| (* v_main_~i~0_BEFORE_CALL_44 v_main_~i~0_BEFORE_CALL_44 v_main_~i~0_BEFORE_CALL_44))))))' at error location [2023-04-01 09:05:20,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:05:20,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:05:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:05:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559528472] [2023-04-01 09:05:20,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:05:20,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:05:20,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:05:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:05:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=725, Unknown=5, NotChecked=0, Total=812 [2023-04-01 09:05:20,504 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 09:05:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:05:20,637 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2023-04-01 09:05:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:05:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-04-01 09:05:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:05:20,638 INFO L225 Difference]: With dead ends: 95 [2023-04-01 09:05:20,638 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 09:05:20,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=109, Invalid=878, Unknown=5, NotChecked=0, Total=992 [2023-04-01 09:05:20,639 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:05:20,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:05:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 09:05:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-04-01 09:05:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:05:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-04-01 09:05:20,657 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2023-04-01 09:05:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:05:20,658 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-04-01 09:05:20,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 09:05:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-04-01 09:05:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 09:05:20,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:05:20,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:05:20,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:20,869 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 [2023-04-01 09:05:20,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:05:20,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:05:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1138047726, now seen corresponding path program 4 times [2023-04-01 09:05:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:05:20,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850490152] [2023-04-01 09:05:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:05:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:05:20,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:05:20,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27826301] [2023-04-01 09:05:20,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:05:20,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:05:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:05:20,910 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) [2023-04-01 09:05:20,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 09:05:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:05:21,022 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 09:05:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 09:05:21,101 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 09:05:21,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 09:05:21,102 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 09:05:21,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 09:05:21,305 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 [2023-04-01 09:05:21,310 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-04-01 09:05:21,312 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 09:05:21,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 09:05:21 BoogieIcfgContainer [2023-04-01 09:05:21,337 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 09:05:21,338 INFO L158 Benchmark]: Toolchain (without parser) took 16780.06ms. Allocated memory was 280.0MB in the beginning and 693.1MB in the end (delta: 413.1MB). Free memory was 229.6MB in the beginning and 245.4MB in the end (delta: -15.8MB). Peak memory consumption was 398.5MB. Max. memory is 8.0GB. [2023-04-01 09:05:21,338 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 136.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 09:05:21,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.77ms. Allocated memory is still 280.0MB. Free memory was 229.2MB in the beginning and 218.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 09:05:21,338 INFO L158 Benchmark]: Boogie Preprocessor took 22.29ms. Allocated memory is still 280.0MB. Free memory was 218.1MB in the beginning and 216.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 09:05:21,339 INFO L158 Benchmark]: RCFGBuilder took 384.57ms. Allocated memory is still 280.0MB. Free memory was 216.6MB in the beginning and 197.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2023-04-01 09:05:21,339 INFO L158 Benchmark]: TraceAbstraction took 16209.82ms. Allocated memory was 280.0MB in the beginning and 693.1MB in the end (delta: 413.1MB). Free memory was 197.2MB in the beginning and 245.4MB in the end (delta: -48.2MB). Peak memory consumption was 366.0MB. Max. memory is 8.0GB. [2023-04-01 09:05:21,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 136.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 159.77ms. Allocated memory is still 280.0MB. Free memory was 229.2MB in the beginning and 218.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.29ms. Allocated memory is still 280.0MB. Free memory was 218.1MB in the beginning and 216.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 384.57ms. Allocated memory is still 280.0MB. Free memory was 216.6MB in the beginning and 197.7MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 16209.82ms. Allocated memory was 280.0MB in the beginning and 693.1MB in the end (delta: 413.1MB). Free memory was 197.2MB in the beginning and 245.4MB in the end (delta: -48.2MB). Peak memory consumption was 366.0MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=3, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=3, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=3, \old(N)=0] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=3, \old(N)=0, a={-1:0}, b={-2:0}, c={-3:0}, i=0] [L32] COND TRUE i