/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-fpi/ifeqn4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:01:43,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:01:43,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:01:43,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:01:43,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:01:43,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:01:43,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:01:43,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:01:43,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:01:43,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:01:43,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:01:43,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:01:43,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:01:43,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:01:43,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:01:43,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:01:43,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:01:43,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:01:43,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:01:43,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:01:43,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:01:43,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:01:43,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:01:43,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:01:43,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:01:43,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:01:43,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:01:43,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:01:43,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:01:43,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:01:43,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:01:43,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:01:43,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:01:43,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:01:43,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:01:43,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:01:43,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:01:43,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:01:43,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:01:43,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:01:43,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:01:43,654 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 03:01:43,683 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:01:43,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:01:43,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:01:43,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:01:43,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:01:43,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:01:43,685 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:01:43,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:01:43,686 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:01:43,686 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:01:43,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:01:43,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:01:43,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:01:43,688 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:01:43,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:01:43,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:01:43,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:01:43,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:01:43,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:01:43,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:01:43,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:01:43,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:01:43,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:01:43,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:01:43,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:01:43,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:01:43,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:01:43,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:01:43,947 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:01:43,948 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:01:43,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4.c [2023-04-01 03:01:45,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:01:45,370 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:01:45,370 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4.c [2023-04-01 03:01:45,376 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cbc945a4/58b0fcbf04f3455eaddce4847ef97ae6/FLAGf8d549d29 [2023-04-01 03:01:45,393 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cbc945a4/58b0fcbf04f3455eaddce4847ef97ae6 [2023-04-01 03:01:45,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:01:45,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:01:45,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:01:45,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:01:45,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:01:45,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f28560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45, skipping insertion in model container [2023-04-01 03:01:45,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:01:45,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:01:45,573 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/ifeqn4.c[589,602] [2023-04-01 03:01:45,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:01:45,603 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:01:45,611 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/ifeqn4.c[589,602] [2023-04-01 03:01:45,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:01:45,630 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:01:45,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45 WrapperNode [2023-04-01 03:01:45,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:01:45,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:01:45,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:01:45,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:01:45,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,676 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:01:45,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:01:45,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:01:45,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:01:45,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (1/1) ... [2023-04-01 03:01:45,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:01:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:45,718 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 03:01:45,722 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 03:01:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:01:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:01:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:01:45,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:01:45,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:01:45,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:01:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:01:45,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:01:45,819 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:01:45,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:01:45,982 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:01:46,086 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:01:46,087 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:01:46,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:01:46 BoogieIcfgContainer [2023-04-01 03:01:46,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:01:46,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:01:46,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:01:46,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:01:46,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:01:45" (1/3) ... [2023-04-01 03:01:46,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a802e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:01:46, skipping insertion in model container [2023-04-01 03:01:46,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:01:45" (2/3) ... [2023-04-01 03:01:46,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a802e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:01:46, skipping insertion in model container [2023-04-01 03:01:46,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:01:46" (3/3) ... [2023-04-01 03:01:46,114 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2023-04-01 03:01:46,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:01:46,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:01:46,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:01:46,226 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;@fb1d563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:01:46,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:01:46,231 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 03:01:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:01:46,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:46,240 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 03:01:46,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:46,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -329856190, now seen corresponding path program 1 times [2023-04-01 03:01:46,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:46,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887309210] [2023-04-01 03:01:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:46,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315575845] [2023-04-01 03:01:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:46,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:46,381 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 03:01:46,389 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 03:01:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:46,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 03:01:46,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:46,604 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 03:01:46,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:01:46,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887309210] [2023-04-01 03:01:46,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315575845] [2023-04-01 03:01:46,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315575845] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:01:46,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:01:46,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:01:46,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78623635] [2023-04-01 03:01:46,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:01:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:01:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:01:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:01:46,658 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), 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 03:01:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:46,766 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-04-01 03:01:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:01:46,769 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), 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 17 [2023-04-01 03:01:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:46,777 INFO L225 Difference]: With dead ends: 48 [2023-04-01 03:01:46,778 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:01:46,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 03:01:46,786 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:46,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:01:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 03:01:46,817 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 03:01:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 03:01:46,818 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 03:01:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:46,819 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 03:01:46,819 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), 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 03:01:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 03:01:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:01:46,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:46,820 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 03:01:46,827 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 03:01:47,021 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 03:01:47,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:47,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash 276511424, now seen corresponding path program 1 times [2023-04-01 03:01:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457701110] [2023-04-01 03:01:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:47,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:47,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640434430] [2023-04-01 03:01:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:47,065 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 03:01:47,077 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 03:01:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:47,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 03:01:47,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:47,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:01:47,333 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 03:01:47,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:47,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:47,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 03:01:47,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:47,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:01:47,632 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 03:01:47,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:47,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457701110] [2023-04-01 03:01:47,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640434430] [2023-04-01 03:01:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640434430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388216185] [2023-04-01 03:01:47,661 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:47,661 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:47,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:47,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:47,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:47,781 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:48,211 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:48,243 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:48,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:48,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:48,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (exists ((v_main_~b~0.base_BEFORE_CALL_1 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_1) 0) 1)) (<= (+ v_main_~b~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|))) (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:48,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:48,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:48,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2023-04-01 03:01:48,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682200327] [2023-04-01 03:01:48,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 03:01:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 03:01:48,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2023-04-01 03:01:48,965 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:49,142 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 03:01:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 03:01:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 03:01:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:49,144 INFO L225 Difference]: With dead ends: 39 [2023-04-01 03:01:49,144 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 03:01:49,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:01:49,146 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:49,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 03:01:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 03:01:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 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 03:01:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 03:01:49,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2023-04-01 03:01:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:49,153 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 03:01:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 03:01:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 03:01:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:01:49,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:49,154 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:49,169 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 03:01:49,361 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 03:01:49,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:49,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1073576919, now seen corresponding path program 2 times [2023-04-01 03:01:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:49,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288259782] [2023-04-01 03:01:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:49,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:49,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:49,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348378109] [2023-04-01 03:01:49,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:01:49,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:49,428 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 03:01:49,431 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 03:01:49,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:01:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:49,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:01:49,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:49,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:49,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:49,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288259782] [2023-04-01 03:01:49,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:49,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348378109] [2023-04-01 03:01:49,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348378109] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:49,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040860597] [2023-04-01 03:01:49,579 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:49,579 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:49,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:49,579 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:49,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:49,611 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:49,911 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:49,927 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:49,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:49,936 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:50,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_2 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_2 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_2) 0) 1)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:50,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:50,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:50,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 03:01:50,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169518035] [2023-04-01 03:01:50,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:01:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:50,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:01:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-04-01 03:01:50,517 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 03:01:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:50,617 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-04-01 03:01:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:01:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 20 [2023-04-01 03:01:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:50,619 INFO L225 Difference]: With dead ends: 51 [2023-04-01 03:01:50,619 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 03:01:50,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:01:50,621 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:50,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 03:01:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-04-01 03:01:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 03:01:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 03:01:50,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-04-01 03:01:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:50,627 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 03:01:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 03:01:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 03:01:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:01:50,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:50,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:50,636 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 03:01:50,834 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 03:01:50,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:50,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -737043390, now seen corresponding path program 3 times [2023-04-01 03:01:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580485197] [2023-04-01 03:01:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:50,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:50,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416293308] [2023-04-01 03:01:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:01:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:50,892 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 03:01:50,915 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 03:01:51,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:01:51,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:51,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 03:01:51,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:51,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:01:51,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 03:01:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:51,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:51,275 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 03:01:51,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:51,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 03:01:51,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:51,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:01:51,367 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 28 treesize of output 16 [2023-04-01 03:01:51,374 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 26 treesize of output 24 [2023-04-01 03:01:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:01:51,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580485197] [2023-04-01 03:01:51,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416293308] [2023-04-01 03:01:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416293308] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:51,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133149606] [2023-04-01 03:01:51,394 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:51,394 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:51,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:51,394 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:51,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:51,422 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:51,686 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:51,702 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:51,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:51,713 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:52,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '834#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_3 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_3 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_3) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:52,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:52,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:52,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-04-01 03:01:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685032030] [2023-04-01 03:01:52,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:01:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:01:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:01:52,352 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 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 03:01:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:52,574 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-04-01 03:01:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:01:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 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 21 [2023-04-01 03:01:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:52,576 INFO L225 Difference]: With dead ends: 48 [2023-04-01 03:01:52,576 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 03:01:52,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-04-01 03:01:52,577 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:52,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:01:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 03:01:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2023-04-01 03:01:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 03:01:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 03:01:52,589 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2023-04-01 03:01:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:52,590 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 03:01:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 3 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 03:01:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 03:01:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:01:52,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:52,592 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:52,601 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 03:01:52,798 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 03:01:52,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:52,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash 944203426, now seen corresponding path program 4 times [2023-04-01 03:01:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:52,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578531633] [2023-04-01 03:01:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:52,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:52,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502495993] [2023-04-01 03:01:52,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:01:52,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:52,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:52,835 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 03:01:52,838 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 03:01:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:52,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:01:52,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:52,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:52,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578531633] [2023-04-01 03:01:52,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502495993] [2023-04-01 03:01:52,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502495993] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:52,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427526767] [2023-04-01 03:01:52,992 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:52,993 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:52,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:52,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:52,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:53,014 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:53,216 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:53,228 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:53,235 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:53,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1128#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_4 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_4 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_4) 0) 1)))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:53,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:53,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 03:01:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884671164] [2023-04-01 03:01:53,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:01:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:01:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:01:53,818 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 03:01:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:53,964 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-04-01 03:01:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:01:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 03:01:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:53,967 INFO L225 Difference]: With dead ends: 70 [2023-04-01 03:01:53,967 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 03:01:53,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:01:53,968 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:53,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:01:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 03:01:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-04-01 03:01:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 03:01:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-04-01 03:01:53,981 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 23 [2023-04-01 03:01:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:53,981 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-04-01 03:01:53,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 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 03:01:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-04-01 03:01:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:01:53,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:53,983 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:54,001 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 03:01:54,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:54,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:54,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:54,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1248848471, now seen corresponding path program 5 times [2023-04-01 03:01:54,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:54,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675201900] [2023-04-01 03:01:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:54,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:54,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242961419] [2023-04-01 03:01:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:01:54,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:54,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:54,235 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 03:01:54,236 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 03:01:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:01:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:54,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 03:01:54,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:54,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:54,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675201900] [2023-04-01 03:01:54,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242961419] [2023-04-01 03:01:54,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242961419] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [568923236] [2023-04-01 03:01:54,561 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:54,561 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:54,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:54,562 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:54,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:54,580 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:54,769 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:54,780 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:54,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:54,787 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:55,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1487#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_5 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_5 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_5) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:55,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:55,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 03:01:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503074274] [2023-04-01 03:01:55,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 03:01:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 03:01:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-04-01 03:01:55,356 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 03:01:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:55,638 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2023-04-01 03:01:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 03:01:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 24 [2023-04-01 03:01:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:55,639 INFO L225 Difference]: With dead ends: 77 [2023-04-01 03:01:55,639 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 03:01:55,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:01:55,641 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:55,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 74 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:01:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 03:01:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2023-04-01 03:01:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:01:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-04-01 03:01:55,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 24 [2023-04-01 03:01:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:55,684 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-04-01 03:01:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 03:01:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-04-01 03:01:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 03:01:55,685 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:55,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:01:55,699 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 03:01:55,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:55,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:55,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2102910274, now seen corresponding path program 6 times [2023-04-01 03:01:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:55,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579623518] [2023-04-01 03:01:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:55,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:55,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767271939] [2023-04-01 03:01:55,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:01:55,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:55,925 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 03:01:55,930 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 03:01:56,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:01:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:01:56,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 03:01:56,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:56,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 03:01:56,585 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 03:01:56,609 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 03:01:56,626 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 03:01:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:01:56,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:01:56,833 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 03:01:56,997 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 03:01:57,175 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 03:01:57,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:57,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 03:01:57,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:01:57,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:01:57,346 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 50 treesize of output 38 [2023-04-01 03:01:57,349 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 322 treesize of output 318 [2023-04-01 03:01:57,390 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 8 treesize of output 4 [2023-04-01 03:01:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 03:01:57,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:01:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579623518] [2023-04-01 03:01:57,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:01:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767271939] [2023-04-01 03:01:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767271939] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:01:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912883581] [2023-04-01 03:01:57,411 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:01:57,411 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:01:57,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:01:57,411 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:01:57,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:01:57,434 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:01:57,636 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:01:57,648 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:01:57,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:01:57,658 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:01:58,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1898#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_6 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_6 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_6) 0) 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:01:58,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:01:58,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:01:58,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-04-01 03:01:58,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772242526] [2023-04-01 03:01:58,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:01:58,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 03:01:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:01:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 03:01:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 03:01:58,313 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 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 03:01:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:01:59,018 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-04-01 03:01:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 03:01:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 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 25 [2023-04-01 03:01:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:01:59,020 INFO L225 Difference]: With dead ends: 96 [2023-04-01 03:01:59,020 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 03:01:59,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:01:59,022 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:01:59,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:01:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 03:01:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2023-04-01 03:01:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 03:01:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-04-01 03:01:59,037 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 25 [2023-04-01 03:01:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:01:59,037 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-04-01 03:01:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 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 03:01:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-04-01 03:01:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 03:01:59,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:01:59,038 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 03:01:59,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 03:01:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:59,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:01:59,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:01:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 137138764, now seen corresponding path program 1 times [2023-04-01 03:01:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:01:59,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241286167] [2023-04-01 03:01:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:01:59,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:01:59,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797622666] [2023-04-01 03:01:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:01:59,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:01:59,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:01:59,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:01:59,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:01:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:01:59,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 03:01:59,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:01:59,416 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 03:01:59,442 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 03:01:59,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:01:59,502 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 03:01:59,533 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 03:01:59,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:01:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:01:59,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:00,111 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 03:02:06,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:06,617 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 33 treesize of output 47 [2023-04-01 03:02:06,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:06,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:02:06,691 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 152 treesize of output 138 [2023-04-01 03:02:06,720 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 35 treesize of output 31 [2023-04-01 03:02:06,738 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 29 treesize of output 21 [2023-04-01 03:02:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:08,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241286167] [2023-04-01 03:02:08,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:02:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797622666] [2023-04-01 03:02:08,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797622666] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113232740] [2023-04-01 03:02:08,847 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:02:08,847 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:08,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:08,848 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:08,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:08,880 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:09,301 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:02:09,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:09,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:09,375 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:14,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2375#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~b~0.base_BEFORE_CALL_13 Int) (v_main_~i~0_BEFORE_CALL_17 Int) (|v_main_#t~mem13_BEFORE_CALL_15| Int)) (and (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_17)) (<= 0 v_main_~i~0_BEFORE_CALL_17) (<= 1 (+ v_main_~i~0_BEFORE_CALL_17 ~N~0)) (<= (+ v_main_~b~0.base_BEFORE_CALL_13 1) |#StackHeapBarrier|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_17 |#StackHeapBarrier|)) (not (= (+ (* v_main_~i~0_BEFORE_CALL_17 4) 1 (* 4 (* v_main_~i~0_BEFORE_CALL_17 v_main_~i~0_BEFORE_CALL_17))) |v_main_#t~mem13_BEFORE_CALL_15|)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 2147483647) (= |v_main_#t~mem13_BEFORE_CALL_15| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_13) (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 8)))) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_17 4294967296)) (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_13) (+ (* (mod v_main_~i~0_BEFORE_CALL_17 4294967296) 8) (- 34359738368))) |v_main_#t~mem13_BEFORE_CALL_15|))) (< v_main_~i~0_BEFORE_CALL_17 ~N~0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:14,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:14,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:02:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-04-01 03:02:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526293617] [2023-04-01 03:02:14,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:14,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 03:02:14,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 03:02:14,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1492, Unknown=19, NotChecked=0, Total=1640 [2023-04-01 03:02:14,980 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:02:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:18,588 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2023-04-01 03:02:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 03:02:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-04-01 03:02:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:18,589 INFO L225 Difference]: With dead ends: 89 [2023-04-01 03:02:18,589 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 03:02:18,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=239, Invalid=2289, Unknown=22, NotChecked=0, Total=2550 [2023-04-01 03:02:18,591 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:18,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 202 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 03:02:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 03:02:18,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-04-01 03:02:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 58 states have internal predecessors, (65), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 03:02:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2023-04-01 03:02:18,605 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 28 [2023-04-01 03:02:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:18,606 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2023-04-01 03:02:18,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:02:18,606 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2023-04-01 03:02:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 03:02:18,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:18,607 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:18,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:02:18,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 03:02:18,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:18,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1871586814, now seen corresponding path program 7 times [2023-04-01 03:02:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:18,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021057836] [2023-04-01 03:02:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:18,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:02:18,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689927642] [2023-04-01 03:02:18,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:02:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:18,847 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:02:18,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:02:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:02:19,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 03:02:19,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:02:19,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:02:19,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021057836] [2023-04-01 03:02:19,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:02:19,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689927642] [2023-04-01 03:02:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689927642] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:19,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84640114] [2023-04-01 03:02:19,704 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:02:19,705 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:19,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:19,705 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:19,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:19,726 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:19,912 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:02:19,926 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:19,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:19,935 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:21,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2867#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_16 Int)) (and (<= (+ v_main_~b~0.base_BEFORE_CALL_16 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_16) 0) 1)))) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:21,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:21,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:02:21,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 03:02:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088632281] [2023-04-01 03:02:21,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:21,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 03:02:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:21,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 03:02:21,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2023-04-01 03:02:21,574 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 03:02:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:22,432 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-04-01 03:02:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 03:02:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 29 [2023-04-01 03:02:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:22,433 INFO L225 Difference]: With dead ends: 131 [2023-04-01 03:02:22,433 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 03:02:22,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:02:22,435 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:22,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 88 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:02:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 03:02:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2023-04-01 03:02:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 03:02:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2023-04-01 03:02:22,457 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 29 [2023-04-01 03:02:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:22,458 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2023-04-01 03:02:22,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 03:02:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2023-04-01 03:02:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 03:02:22,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:22,459 INFO L195 NwaCegarLoop]: trace histogram [4, 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 03:02:22,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 03:02:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:22,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:22,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash -637714516, now seen corresponding path program 2 times [2023-04-01 03:02:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:22,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161022517] [2023-04-01 03:02:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:22,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:02:22,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168388159] [2023-04-01 03:02:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:02:22,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:22,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:02:22,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 03:02:22,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:02:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:02:22,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 03:02:22,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:02:23,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 03:02:23,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161022517] [2023-04-01 03:02:23,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:02:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168388159] [2023-04-01 03:02:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168388159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473601484] [2023-04-01 03:02:23,115 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:02:23,115 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:23,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:23,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:23,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:23,158 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:23,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:02:23,617 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:23,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:23,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:27,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3456#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((v_main_~b~0.base_BEFORE_CALL_21 Int) (v_main_~i~0_BEFORE_CALL_25 Int) (|v_main_#t~mem13_BEFORE_CALL_23| Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_25) (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_25)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_25 4294967296) 2147483647) (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_21) (* (mod v_main_~i~0_BEFORE_CALL_25 4294967296) 8)) |v_main_#t~mem13_BEFORE_CALL_23|)) (and (= |v_main_#t~mem13_BEFORE_CALL_23| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_21) (+ (* (mod v_main_~i~0_BEFORE_CALL_25 4294967296) 8) (- 34359738368)))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_25 4294967296)))) (not (= (+ (* (* v_main_~i~0_BEFORE_CALL_25 v_main_~i~0_BEFORE_CALL_25) 4) (* v_main_~i~0_BEFORE_CALL_25 4) 1) |v_main_#t~mem13_BEFORE_CALL_23|)) (<= (+ v_main_~b~0.base_BEFORE_CALL_21 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_25 ~N~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_25 ~N~0)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_25 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:27,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:27,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:02:27,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-04-01 03:02:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697915972] [2023-04-01 03:02:27,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:02:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:02:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=815, Unknown=1, NotChecked=0, Total=930 [2023-04-01 03:02:27,568 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:02:28,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:28,391 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2023-04-01 03:02:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 03:02:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-01 03:02:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:28,393 INFO L225 Difference]: With dead ends: 110 [2023-04-01 03:02:28,393 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 03:02:28,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=209, Invalid=1350, Unknown=1, NotChecked=0, Total=1560 [2023-04-01 03:02:28,394 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:28,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 122 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 03:02:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 03:02:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2023-04-01 03:02:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 03:02:28,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2023-04-01 03:02:28,413 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 30 [2023-04-01 03:02:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:28,413 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2023-04-01 03:02:28,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 03:02:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2023-04-01 03:02:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 03:02:28,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:28,414 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:28,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 03:02:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 03:02:28,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:28,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1682701833, now seen corresponding path program 8 times [2023-04-01 03:02:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752997527] [2023-04-01 03:02:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:28,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:28,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:02:28,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947347817] [2023-04-01 03:02:28,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:02:28,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:28,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:28,650 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:02:28,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 03:02:30,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 03:02:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:02:30,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 03:02:30,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:30,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:30,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:30,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752997527] [2023-04-01 03:02:30,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:02:30,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947347817] [2023-04-01 03:02:30,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947347817] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:30,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385703467] [2023-04-01 03:02:30,882 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:02:30,883 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:30,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:30,883 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:30,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:30,906 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:31,105 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-04-01 03:02:31,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:31,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:31,133 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:32,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4004#(and (exists ((v_main_~b~0.base_BEFORE_CALL_24 Int)) (and (not (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_24) 0) 1)) (<= (+ v_main_~b~0.base_BEFORE_CALL_24 1) |#StackHeapBarrier|))) (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:32,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:32,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:02:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-04-01 03:02:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260536506] [2023-04-01 03:02:32,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:32,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 03:02:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 03:02:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 03:02:32,915 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 03:02:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:34,953 INFO L93 Difference]: Finished difference Result 199 states and 250 transitions. [2023-04-01 03:02:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 03:02:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 30 [2023-04-01 03:02:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:34,955 INFO L225 Difference]: With dead ends: 199 [2023-04-01 03:02:34,955 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 03:02:34,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=797, Invalid=4173, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 03:02:34,957 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:34,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 100 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 03:02:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 03:02:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2023-04-01 03:02:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 95 states have internal predecessors, (109), 17 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 03:02:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2023-04-01 03:02:34,990 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 30 [2023-04-01 03:02:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:34,990 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2023-04-01 03:02:34,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 03:02:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2023-04-01 03:02:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 03:02:34,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:34,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:35,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 03:02:35,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 03:02:35,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:35,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1333055156, now seen corresponding path program 3 times [2023-04-01 03:02:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539546623] [2023-04-01 03:02:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:35,223 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 03:02:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046911811] [2023-04-01 03:02:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:02:35,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:35,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:02:35,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 03:02:35,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:02:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:02:35,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-01 03:02:35,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:35,761 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 03:02:35,786 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 03:02:35,820 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 21 treesize of output 20 [2023-04-01 03:02:35,863 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 21 treesize of output 20 [2023-04-01 03:02:35,899 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 21 treesize of output 20 [2023-04-01 03:02:35,964 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 03:02:36,009 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 28 treesize of output 30 [2023-04-01 03:02:36,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:36,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2023-04-01 03:02:36,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:36,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2023-04-01 03:02:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:36,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:37,712 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 03:02:40,900 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_main_~i~0 0))) (and (or .cse0 (let ((.cse1 (+ c_main_~i~0 3))) (and (not (= .cse1 0)) (forall ((v_ArrVal_764 Int) (main_~b~0.offset Int) (v_ArrVal_759 Int) (v_ArrVal_753 (Array Int Int))) (= 9 (select (store (store (store v_ArrVal_753 (+ main_~b~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8)) (let ((.cse2 (* (mod c_main_~i~0 4294967296) 8))) (+ (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_753) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2)) (select v_ArrVal_753 (+ main_~b~0.offset .cse2))))) (+ main_~b~0.offset (* (mod (+ c_main_~i~0 2) 4294967296) 8)) v_ArrVal_759) (+ main_~b~0.offset (* 8 (mod .cse1 4294967296))) v_ArrVal_764) (+ main_~b~0.offset 8))))))) (or (forall ((main_~b~0.offset Int)) (= 8 (select (select (store |c_#memory_int| c_main_~b~0.base (store (select |c_#memory_int| c_main_~b~0.base) main_~b~0.offset 1)) c_main_~a~0.base) c_main_~a~0.offset))) (not .cse0)))) is different from false [2023-04-01 03:02:41,082 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 03:02:41,492 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 03:02:42,094 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 03:02:42,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:42,523 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 33 treesize of output 47 [2023-04-01 03:02:42,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:42,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:02:42,602 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 69 treesize of output 57 [2023-04-01 03:02:42,634 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 322 treesize of output 318 [2023-04-01 03:02:42,755 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 8 treesize of output 4 [2023-04-01 03:02:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-01 03:02:42,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539546623] [2023-04-01 03:02:42,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 03:02:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046911811] [2023-04-01 03:02:42,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046911811] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:42,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856587690] [2023-04-01 03:02:42,771 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 03:02:42,771 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:42,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:42,771 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:42,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:42,790 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:43,132 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 03:02:43,191 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:43,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:43,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:45,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4841#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (exists ((v_main_~b~0.base_BEFORE_CALL_31 Int) (|v_main_#t~mem13_BEFORE_CALL_33| Int) (v_main_~i~0_BEFORE_CALL_36 Int)) (and (<= ~N~0 (+ 2147483647 v_main_~i~0_BEFORE_CALL_36)) (<= 0 v_main_~i~0_BEFORE_CALL_36) (<= (+ v_main_~b~0.base_BEFORE_CALL_31 1) |#StackHeapBarrier|) (not (= (+ (* (* v_main_~i~0_BEFORE_CALL_36 v_main_~i~0_BEFORE_CALL_36) 4) (* v_main_~i~0_BEFORE_CALL_36 4) 1) |v_main_#t~mem13_BEFORE_CALL_33|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_36 ~N~0)) (or (and (= |v_main_#t~mem13_BEFORE_CALL_33| (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_31) (* (mod v_main_~i~0_BEFORE_CALL_36 4294967296) 8))) (<= (mod v_main_~i~0_BEFORE_CALL_36 4294967296) 2147483647)) (and (= (select (select |#memory_int| v_main_~b~0.base_BEFORE_CALL_31) (+ (* (mod v_main_~i~0_BEFORE_CALL_36 4294967296) 8) (- 34359738368))) |v_main_#t~mem13_BEFORE_CALL_33|) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_36 4294967296)))) (< v_main_~i~0_BEFORE_CALL_36 ~N~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_36 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:45,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:45,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:02:45,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2023-04-01 03:02:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328732365] [2023-04-01 03:02:45,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 03:02:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 03:02:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2085, Unknown=1, NotChecked=92, Total=2352 [2023-04-01 03:02:45,856 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 33 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4)