/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/ncomp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:06:30,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:06:30,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:06:30,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:06:30,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:06:30,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:06:30,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:06:30,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:06:30,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:06:30,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:06:30,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:06:30,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:06:30,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:06:30,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:06:30,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:06:30,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:06:30,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:06:30,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:06:30,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:06:30,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:06:30,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:06:30,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:06:30,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:06:30,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:06:30,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:06:30,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:06:30,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:06:30,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:06:30,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:06:30,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:06:30,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:06:30,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:06:30,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:06:30,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:06:30,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:06:30,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:06:30,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:06:30,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:06:30,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:06:30,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:06:30,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:06:30,101 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 09:06:30,120 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:06:30,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:06:30,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:06:30,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:06:30,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:06:30,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:06:30,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:06:30,122 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:06:30,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:06:30,122 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:06:30,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:06:30,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:06:30,122 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:06:30,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:06:30,123 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:06:30,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:30,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:06:30,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:06:30,125 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:06:30,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:06:30,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:06:30,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:06:30,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:06:30,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:06:30,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:06:30,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:06:30,345 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:06:30,345 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:06:30,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ncomp.c [2023-04-01 09:06:31,222 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:06:31,441 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:06:31,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ncomp.c [2023-04-01 09:06:31,447 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc65ac8d2/4db958ea5cc148158da306e229a743f0/FLAGfff340249 [2023-04-01 09:06:31,466 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc65ac8d2/4db958ea5cc148158da306e229a743f0 [2023-04-01 09:06:31,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:06:31,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:06:31,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:31,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:06:31,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:06:31,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67364e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31, skipping insertion in model container [2023-04-01 09:06:31,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:06:31,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:06:31,597 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/ncomp.c[588,601] [2023-04-01 09:06:31,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:31,619 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:06:31,627 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/ncomp.c[588,601] [2023-04-01 09:06:31,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:31,642 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:06:31,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31 WrapperNode [2023-04-01 09:06:31,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:31,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:06:31,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:06:31,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:06:31,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:06:31,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:06:31,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:06:31,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:06:31,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (1/1) ... [2023-04-01 09:06:31,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:31,735 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 09:06:31,737 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 09:06:31,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:06:31,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:06:31,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:06:31,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:06:31,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:06:31,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:06:31,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:06:31,774 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:06:31,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:06:31,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:06:31,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:06:31,845 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:06:31,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:06:31,974 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:06:32,006 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:06:32,006 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 09:06:32,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:32 BoogieIcfgContainer [2023-04-01 09:06:32,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:06:32,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:06:32,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:06:32,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:06:32,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:06:31" (1/3) ... [2023-04-01 09:06:32,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3c78b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:32, skipping insertion in model container [2023-04-01 09:06:32,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:31" (2/3) ... [2023-04-01 09:06:32,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3c78b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:32, skipping insertion in model container [2023-04-01 09:06:32,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:32" (3/3) ... [2023-04-01 09:06:32,015 INFO L112 eAbstractionObserver]: Analyzing ICFG ncomp.c [2023-04-01 09:06:32,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:06:32,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:06:32,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:06:32,060 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;@5628c09c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:06:32,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:06:32,063 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 09:06:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:06:32,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:32,067 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 09:06:32,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:32,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash 481871357, now seen corresponding path program 1 times [2023-04-01 09:06:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822522126] [2023-04-01 09:06:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:32,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403172254] [2023-04-01 09:06:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:32,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:32,169 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 09:06:32,170 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 09:06:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:32,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 09:06:32,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:32,517 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-04-01 09:06:32,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-04-01 09:06:32,572 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:06:32,597 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:06:32,624 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:06:32,941 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 09:06:33,145 INFO L321 Elim1Store]: treesize reduction 82, result has 37.4 percent of original size [2023-04-01 09:06:33,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 248 treesize of output 297 [2023-04-01 09:06:33,297 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 09:06:33,409 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 09:06:33,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 119 [2023-04-01 09:06:33,438 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 11 treesize of output 7 [2023-04-01 09:06:33,464 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 09:06:33,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:33,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:33,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822522126] [2023-04-01 09:06:33,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:33,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403172254] [2023-04-01 09:06:33,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403172254] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:33,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:33,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 09:06:33,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525827761] [2023-04-01 09:06:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:06:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:06:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:06:33,494 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 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:33,677 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-04-01 09:06:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:06:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:06:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:33,682 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:06:33,682 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 09:06:33,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 09:06:33,690 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:33,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 84 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 2 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 09:06:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 09:06:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 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 09:06:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-04-01 09:06:33,717 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 18 [2023-04-01 09:06:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:33,718 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-04-01 09:06:33,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-04-01 09:06:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:06:33,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:33,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:33,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:06:33,924 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 09:06:33,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:33,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -537464292, now seen corresponding path program 1 times [2023-04-01 09:06:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588165452] [2023-04-01 09:06:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:33,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:33,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:33,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752961916] [2023-04-01 09:06:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:33,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:33,984 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 09:06:33,986 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 09:06:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:34,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:34,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:34,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:34,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588165452] [2023-04-01 09:06:34,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752961916] [2023-04-01 09:06:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752961916] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:34,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182179522] [2023-04-01 09:06:34,139 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:34,139 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:34,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:34,145 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:34,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:34,313 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:06:35,803 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2023-04-01 09:06:35,861 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:06:35,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:35,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:37,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '337#(and (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int))) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4)) (= (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))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 8) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (= (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) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (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) ~N~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) (not (= |#StackHeapBarrier| 0)) (<= ~N~0 1) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:37,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:37,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:37,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 09:06:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995005050] [2023-04-01 09:06:37,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:37,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 09:06:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 09:06:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:06:37,837 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:37,931 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-04-01 09:06:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:06:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 09:06:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:37,934 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:06:37,934 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 09:06:37,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:06:37,935 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:37,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 09:06:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-04-01 09:06:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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 09:06:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-04-01 09:06:37,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 19 [2023-04-01 09:06:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:37,943 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-04-01 09:06:37,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-04-01 09:06:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:06:37,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:37,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:37,953 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 09:06:38,148 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 09:06:38,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:38,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1341725683, now seen corresponding path program 1 times [2023-04-01 09:06:38,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:38,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700874131] [2023-04-01 09:06:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:38,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:38,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:38,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655422545] [2023-04-01 09:06:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:38,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:38,167 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 09:06:38,180 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 09:06:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:38,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:38,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:38,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:38,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700874131] [2023-04-01 09:06:38,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655422545] [2023-04-01 09:06:38,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655422545] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:38,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:38,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:06:38,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332378593] [2023-04-01 09:06:38,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:38,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:06:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:06:38,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:06:38,249 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:38,308 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-04-01 09:06:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:06:38,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 09:06:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:38,310 INFO L225 Difference]: With dead ends: 57 [2023-04-01 09:06:38,310 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 09:06:38,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:06:38,310 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:38,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:06:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 09:06:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-04-01 09:06:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 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 09:06:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 09:06:38,316 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2023-04-01 09:06:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:38,316 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 09:06:38,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 09:06:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:06:38,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:38,317 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 09:06:38,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 09:06:38,521 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 09:06:38,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:38,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1933725242, now seen corresponding path program 1 times [2023-04-01 09:06:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:38,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092367117] [2023-04-01 09:06:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:38,538 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194911996] [2023-04-01 09:06:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:38,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:38,540 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 09:06:38,542 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 09:06:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:38,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 09:06:38,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:38,639 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 14 treesize of output 12 [2023-04-01 09:06:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:06:38,654 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 09:06:38,655 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 1 case distinctions, treesize of input 17 treesize of output 23 [2023-04-01 09:06:38,657 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:06:38,673 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 14 treesize of output 16 [2023-04-01 09:06:38,691 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 14 treesize of output 16 [2023-04-01 09:06:38,717 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 21 treesize of output 20 [2023-04-01 09:06:38,736 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 15 treesize of output 7 [2023-04-01 09:06:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:38,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:38,884 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_220) c_main_~c~0.base) c_main_~c~0.offset))) is different from false [2023-04-01 09:06:38,890 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_220 (Array Int Int))) (= c_~N~0 (select (select (store (store |c_#memory_int| c_main_~a~0.base v_ArrVal_219) c_main_~b~0.base v_ArrVal_220) c_main_~c~0.base) c_main_~c~0.offset))) is different from false [2023-04-01 09:06:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 09:06:38,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092367117] [2023-04-01 09:06:38,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194911996] [2023-04-01 09:06:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194911996] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213309774] [2023-04-01 09:06:38,912 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:38,912 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:38,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:38,912 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:38,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:38,971 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:06:41,295 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:06:41,333 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:06:41,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:41,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:42,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '844#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 7) 0) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 110) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 99) (= 8 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_2) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1) 99) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~c~0.base_BEFORE_CALL_2 Int)) (and (not (= v_main_~c~0.base_BEFORE_CALL_2 0)) (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_2) 0) ~N~0)) (not (= v_main_~c~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)))) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:42,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:42,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:42,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-04-01 09:06:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546589668] [2023-04-01 09:06:42,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 09:06:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 09:06:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=956, Unknown=2, NotChecked=126, Total=1190 [2023-04-01 09:06:42,937 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:06:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:51,518 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-04-01 09:06:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:06:51,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-04-01 09:06:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:51,519 INFO L225 Difference]: With dead ends: 55 [2023-04-01 09:06:51,519 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 09:06:51,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=173, Invalid=1471, Unknown=4, NotChecked=158, Total=1806 [2023-04-01 09:06:51,521 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 47 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:51,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 214 Invalid, 3 Unknown, 109 Unchecked, 0.2s Time] [2023-04-01 09:06:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 09:06:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2023-04-01 09:06:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 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 09:06:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-04-01 09:06:51,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2023-04-01 09:06:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:51,528 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-04-01 09:06:51,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:06:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-04-01 09:06:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:06:51,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:51,528 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:51,536 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 09:06:51,729 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 09:06:51,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:51,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash 121414214, now seen corresponding path program 2 times [2023-04-01 09:06:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163175575] [2023-04-01 09:06:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:51,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:51,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732623447] [2023-04-01 09:06:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:06:51,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:51,749 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 09:06:51,751 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 09:06:51,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:06:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:06:51,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:06:51,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:06:51,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:06:51,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163175575] [2023-04-01 09:06:51,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732623447] [2023-04-01 09:06:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732623447] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432306208] [2023-04-01 09:06:51,977 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:51,977 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:51,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:51,977 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:51,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:52,039 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:06:54,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:06:54,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:06:54,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:54,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:55,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1166#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#valid)_BEFORE_CALL_11|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 99) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 99) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_3) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 7) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= 8 (select |v_old(#length)_BEFORE_CALL_11| 2)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~c~0.base_BEFORE_CALL_3 Int)) (and (not (= v_main_~c~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_3) 0) ~N~0)) (not (= v_main_~c~0.base_BEFORE_CALL_3 0)))) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:55,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:55,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:55,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:06:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67971864] [2023-04-01 09:06:55,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:55,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:06:55,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:06:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:06:55,919 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:56,156 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2023-04-01 09:06:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:06:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 09:06:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:56,159 INFO L225 Difference]: With dead ends: 86 [2023-04-01 09:06:56,159 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 09:06:56,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-04-01 09:06:56,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:56,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 09:06:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2023-04-01 09:06:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 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 09:06:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 09:06:56,171 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 23 [2023-04-01 09:06:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:56,171 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 09:06:56,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 09:06:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 09:06:56,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:56,172 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:56,181 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 09:06:56,372 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 09:06:56,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:56,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash 484781011, now seen corresponding path program 3 times [2023-04-01 09:06:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965836604] [2023-04-01 09:06:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:56,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:56,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381951645] [2023-04-01 09:06:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:06:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:56,441 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 09:06:56,442 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 09:06:56,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:06:56,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:06:56,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:06:56,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:06:56,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:06:56,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965836604] [2023-04-01 09:06:56,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381951645] [2023-04-01 09:06:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381951645] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644152823] [2023-04-01 09:06:56,604 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:06:56,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:56,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:56,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:56,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:56,686 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:06:58,861 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:06:58,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:06:58,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:58,911 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:00,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1557#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_main_~c~0.base_BEFORE_CALL_4 Int)) (and (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_4) 0) ~N~0)) (not (= v_main_~c~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)) (not (= v_main_~c~0.base_BEFORE_CALL_4 0)))) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_4) 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 99) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2)) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3)) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) |v_old(#length)_BEFORE_CALL_15|)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 99) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 2))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:00,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:00,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:00,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:07:00,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683754019] [2023-04-01 09:07:00,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:07:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:07:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-04-01 09:07:00,450 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:00,738 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2023-04-01 09:07:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 09:07:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 09:07:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:00,739 INFO L225 Difference]: With dead ends: 94 [2023-04-01 09:07:00,739 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 09:07:00,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 09:07:00,740 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:00,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 85 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 09:07:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2023-04-01 09:07:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:07:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2023-04-01 09:07:00,749 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 25 [2023-04-01 09:07:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:00,749 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2023-04-01 09:07:00,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2023-04-01 09:07:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:07:00,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:00,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:00,770 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 09:07:00,955 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 09:07:00,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:00,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1109071910, now seen corresponding path program 4 times [2023-04-01 09:07:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:00,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909772660] [2023-04-01 09:07:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:00,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815414673] [2023-04-01 09:07:00,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:07:00,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:00,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:00,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:00,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 09:07:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:01,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-01 09:07:01,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:01,680 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-04-01 09:07:01,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 229 [2023-04-01 09:07:01,689 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:01,699 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:01,708 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:01,779 INFO L321 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-04-01 09:07:01,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 119 [2023-04-01 09:07:01,815 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 09:07:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,842 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 69 [2023-04-01 09:07:01,848 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 09:07:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,945 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 0 case distinctions, treesize of input 48 treesize of output 11 [2023-04-01 09:07:01,947 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 09:07:01,980 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:01,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,014 INFO L321 Elim1Store]: treesize reduction 35, result has 31.4 percent of original size [2023-04-01 09:07:02,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 184 treesize of output 200 [2023-04-01 09:07:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,218 INFO L321 Elim1Store]: treesize reduction 45, result has 37.5 percent of original size [2023-04-01 09:07:02,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 53 [2023-04-01 09:07:02,226 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 09:07:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 17 [2023-04-01 09:07:02,248 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 09:07:02,258 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 09:07:02,272 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 09:07:02,283 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 14 treesize of output 12 [2023-04-01 09:07:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:02,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:02,342 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 09:07:02,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 56 [2023-04-01 09:07:02,352 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 09:07:02,384 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 14 treesize of output 16 [2023-04-01 09:07:02,406 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 14 treesize of output 16 [2023-04-01 09:07:02,457 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 14 treesize of output 16 [2023-04-01 09:07:02,479 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 14 treesize of output 16 [2023-04-01 09:07:02,492 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 14 treesize of output 16 [2023-04-01 09:07:02,532 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 09:07:02,552 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 09:07:02,576 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 09:07:02,603 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 15 treesize of output 7 [2023-04-01 09:07:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:02,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:02,935 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_459 (Array Int Int))) (= c_~N~0 (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_459) c_main_~c~0.base) c_main_~c~0.offset))) is different from false [2023-04-01 09:07:02,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2023-04-01 09:07:03,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909772660] [2023-04-01 09:07:03,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815414673] [2023-04-01 09:07:03,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815414673] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437611499] [2023-04-01 09:07:03,006 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:07:03,006 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:03,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:03,007 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:03,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:03,049 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:05,165 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:07:05,199 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:05,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:05,211 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:06,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2025#(and (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 4)) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_5) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 2)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2)) (not (= |v_old(#length)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1) 99) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 6) 99) (= (select |v_old(#length)_BEFORE_CALL_19| 2) 8) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 3) 109) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 0) 110) (not (= |v_old(#valid)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (exists ((v_main_~c~0.base_BEFORE_CALL_5 Int)) (and (not (= v_main_~c~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~c~0.base_BEFORE_CALL_5) 0) ~N~0)) (not (= v_main_~c~0.base_BEFORE_CALL_5 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:06,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:06,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:06,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2023-04-01 09:07:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235544654] [2023-04-01 09:07:06,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:06,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 09:07:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 09:07:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1534, Unknown=12, NotChecked=80, Total=1806 [2023-04-01 09:07:06,956 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 28 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:18,675 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-04-01 09:07:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:07:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-04-01 09:07:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:18,676 INFO L225 Difference]: With dead ends: 92 [2023-04-01 09:07:18,676 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 09:07:18,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=325, Invalid=2524, Unknown=17, NotChecked=104, Total=2970 [2023-04-01 09:07:18,678 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 113 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:18,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 98 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 502 Invalid, 30 Unknown, 73 Unchecked, 0.9s Time] [2023-04-01 09:07:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 09:07:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2023-04-01 09:07:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 51 states have internal predecessors, (64), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:07:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2023-04-01 09:07:18,691 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 27 [2023-04-01 09:07:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:18,691 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2023-04-01 09:07:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2023-04-01 09:07:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:07:18,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:18,692 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 09:07:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:18,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:18,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1643694567, now seen corresponding path program 1 times [2023-04-01 09:07:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970841408] [2023-04-01 09:07:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:18,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489082171] [2023-04-01 09:07:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:18,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:18,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:18,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:18,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:07:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:19,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 09:07:19,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:19,068 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:07:19,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-04-01 09:07:19,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:19,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:19,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2023-04-01 09:07:19,088 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:19,093 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 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2023-04-01 09:07:19,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:07:19,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-04-01 09:07:19,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-04-01 09:07:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:19,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:20,006 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:20,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:20,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970841408] [2023-04-01 09:07:20,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:20,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489082171] [2023-04-01 09:07:20,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489082171] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:20,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344920218] [2023-04-01 09:07:20,026 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:07:20,026 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:20,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:20,026 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:20,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:20,068 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:23,372 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 110 for LOIs [2023-04-01 09:07:23,427 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:23,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:23,439 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:25,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2524#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_43| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_43| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_26 Int) (|v_old(#length)_BEFORE_CALL_43| (Array Int Int))) (and (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 2)) (= (select |v_old(#length)_BEFORE_CALL_43| 3) 12) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_43| 2) |v_old(#length)_BEFORE_CALL_43|)) (not (= v_main_~a~0.base_BEFORE_CALL_26 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 6) 99) (not (= (select |v_old(#memory_int)_BEFORE_CALL_43| 1) |v_old(#length)_BEFORE_CALL_43|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 1) 99) (not (= |v_old(#valid)_BEFORE_CALL_43| |v_old(#length)_BEFORE_CALL_43|)) (= (select |v_old(#valid)_BEFORE_CALL_43| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_26 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 7) 0) (not (= |v_old(#valid)_BEFORE_CALL_43| (select |v_old(#memory_int)_BEFORE_CALL_43| 1))) (= (select |v_old(#valid)_BEFORE_CALL_43| 3) 1) (= 8 (select |v_old(#length)_BEFORE_CALL_43| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_26 0)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 5) 46) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_43| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_26 |#StackHeapBarrier|)) (= 2 (select |v_old(#length)_BEFORE_CALL_43| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_43| 2) (select |v_old(#memory_int)_BEFORE_CALL_43| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_26 2)) (= (select |v_old(#valid)_BEFORE_CALL_43| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_43| 2) |v_old(#valid)_BEFORE_CALL_43|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_43| v_main_~a~0.base_BEFORE_CALL_26) 0) (= (select |v_old(#valid)_BEFORE_CALL_43| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:25,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:25,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:25,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-04-01 09:07:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324147618] [2023-04-01 09:07:25,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:25,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:07:25,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:07:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1575, Unknown=5, NotChecked=0, Total=1722 [2023-04-01 09:07:25,796 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:07:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:27,479 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2023-04-01 09:07:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 09:07:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2023-04-01 09:07:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:27,481 INFO L225 Difference]: With dead ends: 95 [2023-04-01 09:07:27,481 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 09:07:27,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=294, Invalid=2563, Unknown=5, NotChecked=0, Total=2862 [2023-04-01 09:07:27,482 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 150 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:07:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 09:07:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2023-04-01 09:07:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 09:07:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2023-04-01 09:07:27,496 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 28 [2023-04-01 09:07:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:27,496 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2023-04-01 09:07:27,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:07:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2023-04-01 09:07:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 09:07:27,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:27,497 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:27,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:27,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 09:07:27,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:27,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1729691655, now seen corresponding path program 2 times [2023-04-01 09:07:27,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030391316] [2023-04-01 09:07:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:27,714 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:27,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868957964] [2023-04-01 09:07:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:27,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:27,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:07:27,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:07:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:27,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:07:27,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:07:27,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 09:07:27,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030391316] [2023-04-01 09:07:27,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868957964] [2023-04-01 09:07:27,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868957964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:27,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618926585] [2023-04-01 09:07:27,994 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 09:07:27,994 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:27,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:27,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:27,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:28,044 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:31,252 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 108 for LOIs [2023-04-01 09:07:31,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:31,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:31,320 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:33,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3031#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_67| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_67| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_47 Int) (|v_old(#length)_BEFORE_CALL_67| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_67| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_67| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_47 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 1) 99) (= (select |v_old(#valid)_BEFORE_CALL_67| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#length)_BEFORE_CALL_67|)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_47 3)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 2)) (= (select |v_old(#valid)_BEFORE_CALL_67| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_47 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 2) (select |v_old(#memory_int)_BEFORE_CALL_67| 1))) (= (select |v_old(#valid)_BEFORE_CALL_67| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 2) |v_old(#valid)_BEFORE_CALL_67|)) (= (select |v_old(#valid)_BEFORE_CALL_67| v_main_~a~0.base_BEFORE_CALL_47) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_67| |v_old(#length)_BEFORE_CALL_67|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 7) 0) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 5)) (= (select |v_old(#length)_BEFORE_CALL_67| 2) 8) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#valid)_BEFORE_CALL_67|)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 4)) (= (select |v_old(#length)_BEFORE_CALL_67| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 2) |v_old(#length)_BEFORE_CALL_67|)) (not (= v_main_~a~0.base_BEFORE_CALL_47 0)) (not (= v_main_~a~0.base_BEFORE_CALL_47 |#StackHeapBarrier|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_67| 2) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:33,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:33,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-04-01 09:07:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599086152] [2023-04-01 09:07:33,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:07:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:07:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:07:33,496 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:07:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:33,848 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2023-04-01 09:07:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:07:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 09:07:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:33,849 INFO L225 Difference]: With dead ends: 116 [2023-04-01 09:07:33,849 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 09:07:33,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=221, Invalid=1501, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:07:33,851 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:33,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 81 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:07:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 09:07:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2023-04-01 09:07:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 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 09:07:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-04-01 09:07:33,890 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 32 [2023-04-01 09:07:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:33,891 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-04-01 09:07:33,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:07:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-04-01 09:07:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 09:07:33,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:33,895 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:33,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 09:07:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:34,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:34,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1061464358, now seen corresponding path program 5 times [2023-04-01 09:07:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:34,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166675360] [2023-04-01 09:07:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:34,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767059708] [2023-04-01 09:07:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:34,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:34,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 09:07:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 09:07:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:35,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:07:35,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:07:36,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:07:36,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166675360] [2023-04-01 09:07:36,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767059708] [2023-04-01 09:07:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767059708] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569948051] [2023-04-01 09:07:36,054 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:07:36,054 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:36,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:36,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:36,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:36,101 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:38,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:07:38,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:38,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:38,083 INFO L180 IcfgInterpreter]: Interpretation finished