/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/ssina.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:09:41,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:09:41,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:09:41,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:09:41,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:09:41,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:09:41,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:09:41,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:09:41,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:09:41,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:09:41,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:09:41,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:09:41,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:09:41,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:09:41,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:09:41,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:09:41,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:09:41,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:09:41,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:09:41,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:09:41,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:09:41,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:09:41,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:09:41,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:09:41,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:09:41,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:09:41,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:09:41,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:09:41,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:09:41,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:09:41,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:09:41,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:09:41,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:09:41,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:09:41,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:09:41,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:09:41,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:09:41,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:09:41,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:09:41,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:09:41,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:09:41,511 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 09:09:41,541 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:09:41,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:09:41,542 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:09:41,542 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:09:41,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:09:41,543 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:09:41,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:09:41,544 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:09:41,544 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:09:41,544 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:09:41,544 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:09:41,544 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:09:41,544 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:09:41,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:09:41,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:09:41,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:09:41,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:09:41,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:09:41,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:09:41,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:09:41,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:09:41,549 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:09:41,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:09:41,549 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:09:41,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:09:41,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:09:41,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:09:41,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:09:41,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:09:41,550 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:09:41,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:09:41,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:09:41,551 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:09:41,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:09:41,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:09:41,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:09:41,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:09:41,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:09:41,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:09:41,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:09:41,780 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:09:41,781 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:09:41,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ssina.c [2023-04-01 09:09:42,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:09:43,077 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:09:43,078 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ssina.c [2023-04-01 09:09:43,083 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d648ac597/2b82d464ab414296955bc392a4324682/FLAGe97165466 [2023-04-01 09:09:43,096 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d648ac597/2b82d464ab414296955bc392a4324682 [2023-04-01 09:09:43,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:09:43,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:09:43,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:09:43,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:09:43,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:09:43,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c00bdaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43, skipping insertion in model container [2023-04-01 09:09:43,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:09:43,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:09:43,262 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/ssina.c[588,601] [2023-04-01 09:09:43,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:09:43,286 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:09:43,295 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/ssina.c[588,601] [2023-04-01 09:09:43,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:09:43,316 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:09:43,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43 WrapperNode [2023-04-01 09:09:43,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:09:43,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:09:43,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:09:43,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:09:43,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:09:43,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:09:43,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:09:43,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:09:43,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (1/1) ... [2023-04-01 09:09:43,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:09:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:43,392 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 09:09:43,402 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 09:09:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:09:43,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:09:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:09:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:09:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:09:43,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:09:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:09:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:09:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:09:43,486 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:09:43,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:09:43,639 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:09:43,696 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:09:43,700 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-04-01 09:09:43,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:09:43 BoogieIcfgContainer [2023-04-01 09:09:43,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:09:43,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:09:43,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:09:43,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:09:43,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:09:43" (1/3) ... [2023-04-01 09:09:43,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d355935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:09:43, skipping insertion in model container [2023-04-01 09:09:43,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:43" (2/3) ... [2023-04-01 09:09:43,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d355935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:09:43, skipping insertion in model container [2023-04-01 09:09:43,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:09:43" (3/3) ... [2023-04-01 09:09:43,726 INFO L112 eAbstractionObserver]: Analyzing ICFG ssina.c [2023-04-01 09:09:43,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:09:43,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:09:43,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:09:43,806 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;@eb4ab72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:09:43,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:09:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 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 09:09:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:09:43,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:43,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:43,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:43,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1946395873, now seen corresponding path program 1 times [2023-04-01 09:09:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:43,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563002179] [2023-04-01 09:09:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:43,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:43,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869774058] [2023-04-01 09:09:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:43,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:43,953 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 09:09:43,969 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 09:09:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:44,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:09:44,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:44,179 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 09:09:44,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:09:44,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563002179] [2023-04-01 09:09:44,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869774058] [2023-04-01 09:09:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869774058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:09:44,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:09:44,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:09:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454597815] [2023-04-01 09:09:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:09:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:09:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:09:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:09:44,213 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:09:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:44,284 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-04-01 09:09:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:09:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-01 09:09:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:44,293 INFO L225 Difference]: With dead ends: 57 [2023-04-01 09:09:44,293 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 09:09:44,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 09:09:44,298 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:44,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:09:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 09:09:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-04-01 09:09:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 09:09:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-04-01 09:09:44,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 20 [2023-04-01 09:09:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:44,333 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-04-01 09:09:44,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:09:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-04-01 09:09:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 09:09:44,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:44,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:44,349 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 09:09:44,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 09:09:44,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:44,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1972538606, now seen corresponding path program 1 times [2023-04-01 09:09:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997396320] [2023-04-01 09:09:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:44,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:44,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:44,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588203333] [2023-04-01 09:09:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:44,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:44,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:44,593 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 09:09:44,595 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 09:09:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:44,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-01 09:09:44,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:44,812 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 10 treesize of output 8 [2023-04-01 09:09:44,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:44,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:45,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:09:45,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:09:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:09:45,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:09:45,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:09:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:45,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:46,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:09:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:46,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997396320] [2023-04-01 09:09:46,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588203333] [2023-04-01 09:09:46,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588203333] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:46,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956159272] [2023-04-01 09:09:46,921 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:09:46,921 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:46,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:46,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:46,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:47,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:09:50,748 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 09:09:50,849 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:09:50,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:50,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:53,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '408#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((|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)) (|v_main_~#sum~0.base_BEFORE_CALL_1| 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) 97) (= (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) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (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) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (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) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2) 105) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:53,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:53,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:53,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-04-01 09:09:53,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129406633] [2023-04-01 09:09:53,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:53,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 09:09:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 09:09:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2295, Unknown=1, NotChecked=0, Total=2550 [2023-04-01 09:09:53,799 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:09:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:58,603 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-04-01 09:09:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 09:09:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-04-01 09:09:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:58,605 INFO L225 Difference]: With dead ends: 71 [2023-04-01 09:09:58,606 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 09:09:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=426, Invalid=3733, Unknown=1, NotChecked=0, Total=4160 [2023-04-01 09:09:58,608 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:58,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 124 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 09:09:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 09:09:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2023-04-01 09:09:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 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 09:09:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-04-01 09:09:58,623 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2023-04-01 09:09:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:58,623 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-04-01 09:09:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:09:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-04-01 09:09:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:09:58,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:58,625 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:58,633 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 09:09:58,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 09:09:58,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:58,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1932529748, now seen corresponding path program 2 times [2023-04-01 09:09:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591069001] [2023-04-01 09:09:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:58,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637125131] [2023-04-01 09:09:58,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:09:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:58,863 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 09:09:58,891 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 09:09:58,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:09:58,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:58,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:09:58,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:09:58,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:09:59,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591069001] [2023-04-01 09:09:59,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637125131] [2023-04-01 09:09:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637125131] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:59,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591580278] [2023-04-01 09:09:59,025 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:09:59,025 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:59,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:59,026 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:59,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:59,101 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:10:01,575 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 09:10:01,636 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:10:01,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:10:01,650 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:10:03,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '810#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_2| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 7) 0) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 0)) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2) 105) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 115) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 99) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= 0 (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= 8 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= 97 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1))) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)))) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:10:03,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:10:03,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:10:03,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:10:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993290718] [2023-04-01 09:10:03,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:10:03,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:10:03,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:10:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=483, Unknown=1, NotChecked=0, Total=552 [2023-04-01 09:10:03,210 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:03,456 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2023-04-01 09:10:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:10:03,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-04-01 09:10:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:03,459 INFO L225 Difference]: With dead ends: 79 [2023-04-01 09:10:03,459 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 09:10:03,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=706, Unknown=1, NotChecked=0, Total=812 [2023-04-01 09:10:03,461 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:03,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:10:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 09:10:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2023-04-01 09:10:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 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 09:10:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-04-01 09:10:03,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 26 [2023-04-01 09:10:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:03,476 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-04-01 09:10:03,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-04-01 09:10:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:10:03,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:03,477 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:03,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:10:03,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:03,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:03,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 647930386, now seen corresponding path program 3 times [2023-04-01 09:10:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047114315] [2023-04-01 09:10:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:03,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234406967] [2023-04-01 09:10:03,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:10:03,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:03,719 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 09:10:03,721 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 09:10:03,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:10:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:10:03,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:10:03,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:10:03,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:10:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:10:03,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047114315] [2023-04-01 09:10:03,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:10:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234406967] [2023-04-01 09:10:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234406967] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:10:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553508740] [2023-04-01 09:10:03,840 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:10:03,840 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:10:03,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:10:03,841 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:10:03,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:10:03,894 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:10:06,013 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 09:10:06,054 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:10:06,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:10:06,069 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:10:07,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1221#(and (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)))) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4) 97) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 3)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#valid)_BEFORE_CALL_11|)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 99) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= (select |v_old(#valid)_BEFORE_CALL_11| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 7) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2) 105) (= 8 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 115) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:10:07,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:10:07,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:10:07,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:10:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429697863] [2023-04-01 09:10:07,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:10:07,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:10:07,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:10:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:10:07,574 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:07,696 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-04-01 09:10:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:10:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-04-01 09:10:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:07,698 INFO L225 Difference]: With dead ends: 82 [2023-04-01 09:10:07,698 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 09:10:07,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:10:07,701 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:07,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 59 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:10:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 09:10:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-01 09:10:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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 09:10:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 09:10:07,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2023-04-01 09:10:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:07,727 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 09:10:07,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:10:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 09:10:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 09:10:07,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:07,729 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, 1, 1] [2023-04-01 09:10:07,739 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 09:10:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:07,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:07,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 942810239, now seen corresponding path program 4 times [2023-04-01 09:10:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:07,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294639047] [2023-04-01 09:10:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:07,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:07,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:07,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803944423] [2023-04-01 09:10:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:10:07,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:07,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:07,996 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 09:10:07,997 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 09:10:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:10:08,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 90 conjunts are in the unsatisfiable core [2023-04-01 09:10:08,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:10:08,095 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 10 treesize of output 8 [2023-04-01 09:10:08,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:10:08,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:10:08,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:10:08,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:10:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:10:08,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:10:15,321 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:10:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:10:15,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:10:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294639047] [2023-04-01 09:10:15,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:10:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803944423] [2023-04-01 09:10:15,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803944423] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:10:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987507724] [2023-04-01 09:10:15,351 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:10:15,352 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:10:15,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:10:15,352 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:10:15,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:10:15,417 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:10:17,494 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-04-01 09:10:17,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:10:17,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:10:17,570 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:10:20,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1656#(and (exists ((v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= (+ (* 2 ~N~0) (* ~N~0 ~N~0) 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0)) (= 97 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3)) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) |v_old(#length)_BEFORE_CALL_15|)) (= (select |v_old(#valid)_BEFORE_CALL_15| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 99) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2) 105) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 115) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 09:10:20,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:10:20,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:10:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 42 [2023-04-01 09:10:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138300525] [2023-04-01 09:10:20,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:10:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-04-01 09:10:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:10:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-04-01 09:10:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2985, Unknown=1, NotChecked=0, Total=3192 [2023-04-01 09:10:20,931 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)