/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/condn.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:04:09,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:04:09,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:04:09,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:04:09,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:04:09,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:04:09,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:04:09,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:04:09,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:04:09,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:04:09,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:04:09,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:04:09,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:04:09,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:04:09,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:04:09,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:04:09,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:04:09,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:04:09,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:04:09,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:04:09,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:04:09,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:04:09,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:04:09,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:04:09,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:04:09,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:04:09,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:04:09,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:04:09,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:04:09,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:04:09,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:04:09,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:04:09,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:04:09,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:04:09,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:04:09,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:04:09,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:04:09,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:04:09,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:04:09,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:04:09,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:04:09,338 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 09:04:09,366 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:04:09,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:04:09,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:04:09,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:04:09,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:04:09,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:04:09,368 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:04:09,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:04:09,369 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:04:09,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:04:09,369 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:04:09,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:04:09,370 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:04:09,370 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:04:09,370 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:04:09,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:04:09,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:04:09,371 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:04:09,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:04:09,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:04:09,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:04:09,373 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:04:09,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:04:09,373 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:04:09,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:04:09,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:04:09,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:04:09,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:04:09,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:04:09,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:04:09,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:04:09,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:04:09,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:04:09,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:04:09,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:04:09,635 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:04:09,636 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:04:09,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2023-04-01 09:04:10,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:04:10,982 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:04:10,983 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2023-04-01 09:04:10,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e201e2e6/b5861fd44b6d4a7496f63c8199b92d80/FLAG0e6ec4217 [2023-04-01 09:04:11,001 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e201e2e6/b5861fd44b6d4a7496f63c8199b92d80 [2023-04-01 09:04:11,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:04:11,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:04:11,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:04:11,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:04:11,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:04:11,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f533beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11, skipping insertion in model container [2023-04-01 09:04:11,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:04:11,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:04:11,191 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/condn.c[588,601] [2023-04-01 09:04:11,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:04:11,220 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:04:11,235 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/condn.c[588,601] [2023-04-01 09:04:11,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:04:11,252 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:04:11,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11 WrapperNode [2023-04-01 09:04:11,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:04:11,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:04:11,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:04:11,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:04:11,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:04:11,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:04:11,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:04:11,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:04:11,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (1/1) ... [2023-04-01 09:04:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:04:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:11,317 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 09:04:11,319 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 09:04:11,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:04:11,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:04:11,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:04:11,348 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:04:11,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:04:11,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:04:11,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:04:11,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:04:11,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:04:11,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:04:11,410 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:04:11,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:04:11,805 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:04:11,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:04:11,845 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:04:11,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:11 BoogieIcfgContainer [2023-04-01 09:04:11,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:04:11,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:04:11,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:04:11,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:04:11,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:04:11" (1/3) ... [2023-04-01 09:04:11,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a089e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:11, skipping insertion in model container [2023-04-01 09:04:11,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:04:11" (2/3) ... [2023-04-01 09:04:11,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a089e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:11, skipping insertion in model container [2023-04-01 09:04:11,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:11" (3/3) ... [2023-04-01 09:04:11,855 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2023-04-01 09:04:11,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:04:11,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:04:11,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:04:11,918 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;@7a044dfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:04:11,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:04:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 09:04:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:04:11,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:11,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:11,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:11,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash -618764107, now seen corresponding path program 1 times [2023-04-01 09:04:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944414749] [2023-04-01 09:04:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:12,291 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 09:04:12,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944414749] [2023-04-01 09:04:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944414749] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:04:12,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:04:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:04:12,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958352434] [2023-04-01 09:04:12,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:04:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:04:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:04:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:04:12,323 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:04:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:12,392 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-04-01 09:04:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:04:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 09:04:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:12,413 INFO L225 Difference]: With dead ends: 48 [2023-04-01 09:04:12,414 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 09:04:12,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:04:12,419 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:12,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:04:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 09:04:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 09:04:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:04:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 09:04:12,477 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 09:04:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:12,478 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 09:04:12,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:04:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 09:04:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:04:12,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:12,479 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 09:04:12,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:04:12,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:12,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:12,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2129516490, now seen corresponding path program 1 times [2023-04-01 09:04:12,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:12,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823805939] [2023-04-01 09:04:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:13,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:13,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823805939] [2023-04-01 09:04:13,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823805939] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:13,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323512401] [2023-04-01 09:04:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:13,153 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 09:04:13,159 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 09:04:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:13,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 09:04:13,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 09:04:13,436 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 09:04:13,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 09:04:13,482 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 09:04:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:13,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:13,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:04:13,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 09:04:13,700 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 63 treesize of output 47 [2023-04-01 09:04:13,712 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 09:04:13,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 20 [2023-04-01 09:04:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323512401] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:13,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954395339] [2023-04-01 09:04:13,777 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:04:13,777 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:13,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:13,786 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:13,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:14,039 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:15,822 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2023-04-01 09:04:15,904 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:15,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:15,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:17,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '260#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (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) 4) 110) (= (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| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (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) 1)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0) 99) (= (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) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3) 100) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:17,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:17,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-04-01 09:04:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773370018] [2023-04-01 09:04:17,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:04:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:04:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:04:17,914 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:18,044 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-04-01 09:04:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:04:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 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 09:04:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:18,048 INFO L225 Difference]: With dead ends: 32 [2023-04-01 09:04:18,048 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 09:04:18,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2023-04-01 09:04:18,053 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:18,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 99 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 09:04:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-04-01 09:04:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 09:04:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-04-01 09:04:18,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 19 [2023-04-01 09:04:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:18,065 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-04-01 09:04:18,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:04:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-04-01 09:04:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:04:18,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:18,066 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] [2023-04-01 09:04:18,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:04:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:18,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:18,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash -213783823, now seen corresponding path program 1 times [2023-04-01 09:04:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818363835] [2023-04-01 09:04:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:18,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:18,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818363835] [2023-04-01 09:04:18,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818363835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594603779] [2023-04-01 09:04:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:18,392 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 09:04:18,395 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 09:04:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:18,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:04:18,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:18,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594603779] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866555103] [2023-04-01 09:04:18,522 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:18,523 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:18,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:18,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:18,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:18,595 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:21,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:04:21,635 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:21,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:21,664 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:23,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (exists ((v_main_~a~0.base_BEFORE_CALL_20 Int) (|v_old(#length)_BEFORE_CALL_25| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_25| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_25| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_22 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_20 3)) (= (select |v_old(#length)_BEFORE_CALL_25| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 0) 99) (not (= v_main_~a~0.base_BEFORE_CALL_20 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= |v_old(#valid)_BEFORE_CALL_25| |v_old(#length)_BEFORE_CALL_25|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_25| 2) |v_old(#length)_BEFORE_CALL_25|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 7) 0) (not (= v_main_~a~0.base_BEFORE_CALL_20 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 2) 110) (not (= v_main_~a~0.base_BEFORE_CALL_20 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_25| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 5) 46) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_20) (* v_main_~i~0_BEFORE_CALL_22 4))) (= (select |v_old(#valid)_BEFORE_CALL_25| 1) 1) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 4)) (not (= v_main_~a~0.base_BEFORE_CALL_20 0)) (= (select |v_old(#valid)_BEFORE_CALL_25| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_25| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 1) 111) (not (= (select |v_old(#memory_int)_BEFORE_CALL_25| 2) (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (< v_main_~i~0_BEFORE_CALL_22 ~N~0) (= 2 (select |v_old(#length)_BEFORE_CALL_25| 1)) (= (select |v_old(#valid)_BEFORE_CALL_25| v_main_~a~0.base_BEFORE_CALL_20) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_25| 1) 0)) (= (select |v_old(#length)_BEFORE_CALL_25| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 1))) (not (= |v_old(#valid)_BEFORE_CALL_25| (select |v_old(#memory_int)_BEFORE_CALL_25| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 3) 100) (= (select (select |v_old(#memory_int)_BEFORE_CALL_25| 2) 6) 99))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:23,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:23,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:23,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 09:04:23,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630045490] [2023-04-01 09:04:23,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:04:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:23,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:04:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-04-01 09:04:23,396 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 09:04:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:23,477 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-04-01 09:04:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:04:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2023-04-01 09:04:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:23,478 INFO L225 Difference]: With dead ends: 61 [2023-04-01 09:04:23,478 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 09:04:23,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:04:23,480 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:23,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 09:04:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-04-01 09:04:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 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 09:04:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-01 09:04:23,486 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2023-04-01 09:04:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-01 09:04:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 09:04:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-01 09:04:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:04:23,488 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:23,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:23,495 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 09:04:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 09:04:23,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:23,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash -340037966, now seen corresponding path program 2 times [2023-04-01 09:04:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:23,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213059100] [2023-04-01 09:04:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:23,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:24,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:24,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213059100] [2023-04-01 09:04:24,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213059100] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:24,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426490010] [2023-04-01 09:04:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:24,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:24,056 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 09:04:24,059 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 09:04:24,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:04:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:24,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 09:04:24,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:24,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2023-04-01 09:04:24,429 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 09:04:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:24,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:24,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:04:24,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 09:04:24,602 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 47 treesize of output 33 [2023-04-01 09:04:24,613 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 09:04:24,614 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 21 treesize of output 14 [2023-04-01 09:04:24,622 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 09:04:24,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 16 [2023-04-01 09:04:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426490010] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401163969] [2023-04-01 09:04:24,675 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:24,676 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:24,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:24,676 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:24,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:24,755 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:27,253 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:04:27,350 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:27,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:27,367 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:29,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '890#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_49| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_43 Int) (|v_old(#memory_int)_BEFORE_CALL_49| (Array Int (Array Int Int))) (v_main_~i~0_BEFORE_CALL_45 Int) (|v_old(#valid)_BEFORE_CALL_49| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_43 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_49| 2) |v_old(#valid)_BEFORE_CALL_49|)) (not (= v_main_~a~0.base_BEFORE_CALL_43 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 6) 99) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 2)) (not (= |v_old(#valid)_BEFORE_CALL_49| (select |v_old(#memory_int)_BEFORE_CALL_49| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 4) 110) (= (select |v_old(#valid)_BEFORE_CALL_49| 1) 1) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_43) (* v_main_~i~0_BEFORE_CALL_45 4))) (= (select |v_old(#valid)_BEFORE_CALL_49| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 5) 46) (= (select |v_old(#length)_BEFORE_CALL_49| 1) 2) (not (= (select |v_old(#memory_int)_BEFORE_CALL_49| 1) |v_old(#length)_BEFORE_CALL_49|)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 1)) (= (select |v_old(#valid)_BEFORE_CALL_49| v_main_~a~0.base_BEFORE_CALL_43) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_49| 3)) (= (select |v_old(#valid)_BEFORE_CALL_49| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_49| 2) |v_old(#length)_BEFORE_CALL_49|)) (= 100 (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_49| 1) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_43 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_49| 2) (select |v_old(#memory_int)_BEFORE_CALL_49| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_43 2)) (= (select |v_old(#valid)_BEFORE_CALL_49| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 2) 0) 99) (not (= |v_old(#valid)_BEFORE_CALL_49| |v_old(#length)_BEFORE_CALL_49|)) (= (select |v_old(#length)_BEFORE_CALL_49| 2) 8) (not (= v_main_~a~0.base_BEFORE_CALL_43 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_45 ~N~0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:29,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:29,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 28 [2023-04-01 09:04:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407416012] [2023-04-01 09:04:29,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 09:04:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 09:04:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 09:04:29,248 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 09:04:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:29,511 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2023-04-01 09:04:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 09:04:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2023-04-01 09:04:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:29,512 INFO L225 Difference]: With dead ends: 41 [2023-04-01 09:04:29,512 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 09:04:29,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 09:04:29,514 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:04:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 09:04:29,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-04-01 09:04:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 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 09:04:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-04-01 09:04:29,521 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 28 [2023-04-01 09:04:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:29,521 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-04-01 09:04:29,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 09:04:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-04-01 09:04:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 09:04:29,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:29,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:29,531 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 09:04:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:29,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:29,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash -875585291, now seen corresponding path program 3 times [2023-04-01 09:04:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577932837] [2023-04-01 09:04:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 09:04:29,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577932837] [2023-04-01 09:04:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577932837] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894530075] [2023-04-01 09:04:29,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:04:29,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:29,833 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 09:04:29,856 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 09:04:29,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:04:29,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:29,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:04:29,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 09:04:29,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 09:04:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894530075] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:29,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228825159] [2023-04-01 09:04:29,996 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:29,996 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:29,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:29,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:29,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:30,039 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:32,399 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:04:32,498 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:32,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:32,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:34,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1256#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_64 Int) (|v_old(#length)_BEFORE_CALL_73| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_73| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_73| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_70 Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_73| 1) 1) (not (= |v_old(#valid)_BEFORE_CALL_73| (select |v_old(#memory_int)_BEFORE_CALL_73| 2))) (< v_main_~i~0_BEFORE_CALL_70 ~N~0) (= (select |v_old(#valid)_BEFORE_CALL_73| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_73| |v_old(#length)_BEFORE_CALL_73|)) (= (select |v_old(#valid)_BEFORE_CALL_73| 0) 0) (not (= |v_old(#length)_BEFORE_CALL_73| (select |v_old(#memory_int)_BEFORE_CALL_73| 1))) (not (= |v_old(#valid)_BEFORE_CALL_73| (select |v_old(#memory_int)_BEFORE_CALL_73| 1))) (= (select |v_old(#valid)_BEFORE_CALL_73| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_73| v_main_~a~0.base_BEFORE_CALL_64) 0) (not (= v_main_~a~0.base_BEFORE_CALL_64 0)) (= (select |v_old(#length)_BEFORE_CALL_73| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_64 3)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 3) 100) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_73| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_64 |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_73| 1) (select |v_old(#memory_int)_BEFORE_CALL_73| 2))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_73| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 5) 46) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 7) 0) (not (= v_main_~a~0.base_BEFORE_CALL_64 1)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_64) (* v_main_~i~0_BEFORE_CALL_70 4))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 0) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 6) 99) (not (= |v_old(#length)_BEFORE_CALL_73| (select |v_old(#memory_int)_BEFORE_CALL_73| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_73| 2) 2) 110) (= (select |v_old(#length)_BEFORE_CALL_73| 2) 8) (not (= v_main_~a~0.base_BEFORE_CALL_64 2)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:34,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:34,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:34,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-04-01 09:04:34,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969665648] [2023-04-01 09:04:34,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:34,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:04:34,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:04:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-04-01 09:04:34,056 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 09:04:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:34,159 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2023-04-01 09:04:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:04:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2023-04-01 09:04:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:34,160 INFO L225 Difference]: With dead ends: 85 [2023-04-01 09:04:34,160 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 09:04:34,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2023-04-01 09:04:34,162 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:34,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 09:04:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-04-01 09:04:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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 09:04:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 09:04:34,169 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2023-04-01 09:04:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:34,169 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 09:04:34,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 09:04:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 09:04:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 09:04:34,170 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:34,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:34,176 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 09:04:34,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:34,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:34,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1007622538, now seen corresponding path program 4 times [2023-04-01 09:04:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:34,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975822023] [2023-04-01 09:04:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:04:34,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:34,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975822023] [2023-04-01 09:04:34,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975822023] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:34,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035513465] [2023-04-01 09:04:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:04:34,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:34,841 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 09:04:34,848 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 09:04:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:34,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 09:04:34,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:34,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-04-01 09:04:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:35,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:04:35,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 16 [2023-04-01 09:04:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:04:35,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:35,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:04:35,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 09:04:35,453 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 69 treesize of output 53 [2023-04-01 09:04:35,458 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 09:04:35,458 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 15 treesize of output 9 [2023-04-01 09:04:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:04:35,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035513465] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:35,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927887209] [2023-04-01 09:04:35,501 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:35,501 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:35,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:35,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:35,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:35,568 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:37,943 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:04:38,035 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:38,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:38,052 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:39,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1713#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#valid)_BEFORE_CALL_97| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_95 Int) (v_main_~a~0.base_BEFORE_CALL_89 Int) (|v_old(#memory_int)_BEFORE_CALL_97| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_97| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_97| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 4) 110) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_97| 1) |v_old(#length)_BEFORE_CALL_97|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 3) 100) (not (= v_main_~a~0.base_BEFORE_CALL_89 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_89 2)) (not (= |v_old(#valid)_BEFORE_CALL_97| (select |v_old(#memory_int)_BEFORE_CALL_97| 2))) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_97| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_89 1)) (= 0 (select |v_old(#valid)_BEFORE_CALL_97| v_main_~a~0.base_BEFORE_CALL_89)) (not (= |v_old(#valid)_BEFORE_CALL_97| |v_old(#length)_BEFORE_CALL_97|)) (not (= |v_old(#valid)_BEFORE_CALL_97| (select |v_old(#memory_int)_BEFORE_CALL_97| 1))) (= (select |v_old(#valid)_BEFORE_CALL_97| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_89 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 6) 99) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 5)) (= (select |v_old(#length)_BEFORE_CALL_97| 2) 8) (not (= |v_old(#length)_BEFORE_CALL_97| (select |v_old(#memory_int)_BEFORE_CALL_97| 2))) (< v_main_~i~0_BEFORE_CALL_95 ~N~0) (= (select |v_old(#valid)_BEFORE_CALL_97| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 0) 99) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 2)) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_89) (* v_main_~i~0_BEFORE_CALL_95 4))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_97| 2) 7) 0) (not (= v_main_~a~0.base_BEFORE_CALL_89 0)) (= (select |v_old(#valid)_BEFORE_CALL_97| 0) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_97| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_97| 1) (select |v_old(#memory_int)_BEFORE_CALL_97| 2))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:39,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:39,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:39,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 12] total 25 [2023-04-01 09:04:39,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129287285] [2023-04-01 09:04:39,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:04:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:04:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 09:04:39,819 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 09:04:41,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 09:04:43,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 09:04:45,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 09:04:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:46,290 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-04-01 09:04:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:04:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2023-04-01 09:04:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:46,291 INFO L225 Difference]: With dead ends: 50 [2023-04-01 09:04:46,291 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 09:04:46,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 09:04:46,292 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 191 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 428 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2023-04-01 09:04:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 09:04:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-04-01 09:04:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:04:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-04-01 09:04:46,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2023-04-01 09:04:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:46,301 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-04-01 09:04:46,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 6 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-01 09:04:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-04-01 09:04:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 09:04:46,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:46,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:46,309 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 09:04:46,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:46,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:46,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1916576945, now seen corresponding path program 5 times [2023-04-01 09:04:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374471954] [2023-04-01 09:04:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:04:46,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374471954] [2023-04-01 09:04:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374471954] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488381887] [2023-04-01 09:04:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:46,637 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 09:04:46,640 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 09:04:46,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 09:04:46,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:46,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:04:46,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:04:46,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:04:46,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488381887] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553599461] [2023-04-01 09:04:46,953 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:46,954 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:46,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:46,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:46,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:47,034 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:04:49,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:04:49,448 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:04:49,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:49,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:51,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2170#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_121| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_121| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_122 Int) (|v_old(#memory_int)_BEFORE_CALL_121| (Array Int (Array Int Int))) (v_main_~a~0.base_BEFORE_CALL_110 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_110 0)) (not (= v_main_~a~0.base_BEFORE_CALL_110 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_121| 1) 0)) (< v_main_~i~0_BEFORE_CALL_122 ~N~0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_121| 1) |v_old(#length)_BEFORE_CALL_121|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 7) 0) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 5)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 1)) (not (= v_main_~a~0.base_BEFORE_CALL_110 2)) (not (= v_main_~a~0.base_BEFORE_CALL_110 |#StackHeapBarrier|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_121| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 6) 99) (< ~N~0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_110) (* v_main_~i~0_BEFORE_CALL_122 4))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_121| 1) |v_old(#valid)_BEFORE_CALL_121|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_121| 1) (select |v_old(#memory_int)_BEFORE_CALL_121| 2))) (not (= |v_old(#length)_BEFORE_CALL_121| (select |v_old(#memory_int)_BEFORE_CALL_121| 2))) (= (select |v_old(#valid)_BEFORE_CALL_121| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 3) 100) (= (select |v_old(#valid)_BEFORE_CALL_121| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 0) 99) (= 8 (select |v_old(#length)_BEFORE_CALL_121| 2)) (= (select |v_old(#valid)_BEFORE_CALL_121| v_main_~a~0.base_BEFORE_CALL_110) 0) (not (= |v_old(#valid)_BEFORE_CALL_121| (select |v_old(#memory_int)_BEFORE_CALL_121| 2))) (not (= |v_old(#valid)_BEFORE_CALL_121| |v_old(#length)_BEFORE_CALL_121|)) (= (select |v_old(#valid)_BEFORE_CALL_121| 2) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_121| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_110 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_121| 2) 2) 110) (= (select |v_old(#length)_BEFORE_CALL_121| 3) 12))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:51,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:51,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:51,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-01 09:04:51,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702608198] [2023-04-01 09:04:51,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 09:04:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 09:04:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:04:51,095 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 09:04:51,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:51,264 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2023-04-01 09:04:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 09:04:51,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2023-04-01 09:04:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:51,265 INFO L225 Difference]: With dead ends: 109 [2023-04-01 09:04:51,265 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 09:04:51,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:04:51,266 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:51,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 09:04:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-04-01 09:04:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:04:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-04-01 09:04:51,275 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2023-04-01 09:04:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-04-01 09:04:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 09:04:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-04-01 09:04:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 09:04:51,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:51,277 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:51,283 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 09:04:51,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:51,483 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:51,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:51,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1578443150, now seen corresponding path program 6 times [2023-04-01 09:04:51,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:51,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510229551] [2023-04-01 09:04:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:51,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:04:52,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510229551] [2023-04-01 09:04:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510229551] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77618120] [2023-04-01 09:04:52,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:04:52,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:52,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:52,177 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 09:04:52,180 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 09:04:52,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:04:52,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:52,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 09:04:52,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:52,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-04-01 09:04:52,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 09:04:52,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 09:04:52,831 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 19 treesize of output 7 [2023-04-01 09:04:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 09:04:52,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:59,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:04:59,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 58 [2023-04-01 09:04:59,642 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 09:04:59,643 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 25 treesize of output 12 [2023-04-01 09:04:59,647 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:04:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 09:04:59,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77618120] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:59,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628726212] [2023-04-01 09:04:59,658 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:04:59,658 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:59,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:59,659 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:59,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:59,713 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2023-04-01 09:05:01,843 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2023-04-01 09:05:01,915 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-04-01 09:05:01,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:05:01,930 INFO L180 IcfgInterpreter]: Interpretation finished