/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 IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:27:42,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:27:42,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:27:42,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:27:42,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:27:42,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:27:42,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:27:42,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:27:42,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:27:42,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:27:42,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:27:42,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:27:42,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:27:42,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:27:42,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:27:42,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:27:42,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:27:42,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:27:42,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:27:42,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:27:42,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:27:42,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:27:42,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:27:42,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:27:42,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:27:42,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:27:42,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:27:42,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:27:42,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:27:42,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:27:42,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:27:42,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:27:42,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:27:42,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:27:42,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:27:42,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:27:42,506 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 [2023-03-31 23:27:42,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:27:42,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:27:42,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:27:42,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:27:42,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:27:42,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:27:42,533 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:27:42,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:27:42,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:27:42,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:27:42,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:27:42,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:27:42,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:27:42,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:27:42,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:27:42,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:27:42,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:27:42,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:27:42,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:27:42,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:27:42,740 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:27:42,741 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:27:42,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2023-03-31 23:27:43,633 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:27:43,824 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:27:43,824 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2023-03-31 23:27:43,828 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee1d0dbe0/2ac20cb0649e4b7281dd4d3a8eb1eb16/FLAGe29237353 [2023-03-31 23:27:43,839 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee1d0dbe0/2ac20cb0649e4b7281dd4d3a8eb1eb16 [2023-03-31 23:27:43,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:27:43,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:27:43,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:27:43,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:27:43,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:27:43,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:27:43" (1/1) ... [2023-03-31 23:27:43,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e6273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:43, skipping insertion in model container [2023-03-31 23:27:43,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:27:43" (1/1) ... [2023-03-31 23:27:43,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:27:43,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:27:43,975 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/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2023-03-31 23:27:43,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:27:43,991 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:27:43,999 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/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2023-03-31 23:27:44,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:27:44,010 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:27:44,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44 WrapperNode [2023-03-31 23:27:44,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:27:44,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:27:44,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:27:44,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:27:44,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:27:44,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:27:44,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:27:44,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:27:44,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (1/1) ... [2023-03-31 23:27:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:27:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:44,048 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) [2023-03-31 23:27:44,050 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 [2023-03-31 23:27:44,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:27:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:27:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:27:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:27:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:27:44,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:27:44,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:27:44,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:27:44,136 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:27:44,138 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:27:44,282 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:27:44,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:27:44,307 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:27:44,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:27:44 BoogieIcfgContainer [2023-03-31 23:27:44,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:27:44,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:27:44,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:27:44,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:27:44,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:27:43" (1/3) ... [2023-03-31 23:27:44,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f955d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:27:44, skipping insertion in model container [2023-03-31 23:27:44,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:44" (2/3) ... [2023-03-31 23:27:44,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f955d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:27:44, skipping insertion in model container [2023-03-31 23:27:44,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:27:44" (3/3) ... [2023-03-31 23:27:44,337 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2023-03-31 23:27:44,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:27:44,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:27:44,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:27:44,403 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;@4a6e0d92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:27:44,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:27:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:27:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:27:44,411 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:44,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:44,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:44,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1070716929, now seen corresponding path program 1 times [2023-03-31 23:27:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:44,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680576941] [2023-03-31 23:27:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:44,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:44,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586984800] [2023-03-31 23:27:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:44,485 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) [2023-03-31 23:27:44,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:27:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:44,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 23:27:44,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:27:44,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:27:44,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680576941] [2023-03-31 23:27:44,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586984800] [2023-03-31 23:27:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586984800] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:27:44,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:27:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:27:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661208615] [2023-03-31 23:27:44,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:27:44,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:27:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:27:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:27:44,625 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-03-31 23:27:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:44,685 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-03-31 23:27:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:27:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 14 [2023-03-31 23:27:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:44,692 INFO L225 Difference]: With dead ends: 50 [2023-03-31 23:27:44,692 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 23:27:44,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:27:44,696 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:44,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:27:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 23:27:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 23:27:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:27:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-31 23:27:44,721 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2023-03-31 23:27:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:44,721 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-31 23:27:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-03-31 23:27:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-31 23:27:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:27:44,723 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:44,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:44,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:27:44,928 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 [2023-03-31 23:27:44,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:44,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1540599750, now seen corresponding path program 1 times [2023-03-31 23:27:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480198200] [2023-03-31 23:27:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:44,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:44,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:44,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990526800] [2023-03-31 23:27:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:44,946 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) [2023-03-31 23:27:44,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:27:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:44,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:27:44,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:27:45,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:27:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:27:45,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480198200] [2023-03-31 23:27:45,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990526800] [2023-03-31 23:27:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990526800] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:27:45,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938887246] [2023-03-31 23:27:45,245 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 23:27:45,246 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:27:45,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:27:45,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:27:45,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:27:45,299 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:27:45,473 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-03-31 23:27:45,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:27:45,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:27:45,569 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:27:48,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~x~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_11 Int) (v_main_~c~0_BEFORE_CALL_7 Int) (v_main_~k~0_BEFORE_CALL_9 Int)) (and (not (= (+ (* 2 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* v_main_~x~0_BEFORE_CALL_11 4))) (or (and (<= 0 v_main_~k~0_BEFORE_CALL_9) (<= 1 v_main_~y~0_BEFORE_CALL_11) (<= v_main_~k~0_BEFORE_CALL_9 20) (<= v_main_~c~0_BEFORE_CALL_7 21) (<= 1 v_main_~x~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (<= 1 v_main_~c~0_BEFORE_CALL_7) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 0 v_main_~k~0_BEFORE_CALL_9) (<= v_main_~k~0_BEFORE_CALL_9 20) (= v_main_~y~0_BEFORE_CALL_11 0) (= v_main_~x~0_BEFORE_CALL_11 0) (= v_main_~c~0_BEFORE_CALL_7 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:27:48,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:27:48,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:27:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-03-31 23:27:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168679497] [2023-03-31 23:27:48,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:27:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:27:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:27:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=467, Unknown=1, NotChecked=0, Total=552 [2023-03-31 23:27:48,100 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:27:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:48,195 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-03-31 23:27:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:27:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-03-31 23:27:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:48,196 INFO L225 Difference]: With dead ends: 38 [2023-03-31 23:27:48,196 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 23:27:48,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=101, Invalid=548, Unknown=1, NotChecked=0, Total=650 [2023-03-31 23:27:48,197 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:48,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 107 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:27:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 23:27:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-03-31 23:27:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:27:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-03-31 23:27:48,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2023-03-31 23:27:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:48,202 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-03-31 23:27:48,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:27:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-03-31 23:27:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 23:27:48,203 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:48,203 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:48,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:27:48,409 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 [2023-03-31 23:27:48,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:48,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1414863620, now seen corresponding path program 1 times [2023-03-31 23:27:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301119330] [2023-03-31 23:27:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:48,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:48,420 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133604283] [2023-03-31 23:27:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:48,425 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) [2023-03-31 23:27:48,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:27:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:48,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:27:48,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:27:48,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:28:20,133 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_13 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3)) 4) 0)))) is different from true [2023-03-31 23:28:38,179 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_13 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-03-31 23:28:44,217 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-03-31 23:28:46,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:28:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301119330] [2023-03-31 23:28:46,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:28:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133604283] [2023-03-31 23:28:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133604283] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:28:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256442198] [2023-03-31 23:28:46,244 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:28:46,244 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:28:46,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:28:46,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:28:46,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:28:46,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:28:46,390 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:28:46,393 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:28:46,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:28:46,402 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:28:46,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '568#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:28:46,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:28:46,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:28:46,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 23:28:46,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485889811] [2023-03-31 23:28:46,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:28:46,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:28:46,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:28:46,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:28:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=520, Unknown=4, NotChecked=144, Total=756 [2023-03-31 23:28:46,679 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 23:28:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:28:46,763 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-03-31 23:28:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:28:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-03-31 23:28:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:28:46,764 INFO L225 Difference]: With dead ends: 36 [2023-03-31 23:28:46,764 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 23:28:46,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=103, Invalid=607, Unknown=4, NotChecked=156, Total=870 [2023-03-31 23:28:46,765 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:28:46,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:28:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 23:28:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 23:28:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:28:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-03-31 23:28:46,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-03-31 23:28:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:28:46,770 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-03-31 23:28:46,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 23:28:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-03-31 23:28:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:28:46,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:28:46,771 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:28:46,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:28:46,973 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 [2023-03-31 23:28:46,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:28:46,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:28:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1826650261, now seen corresponding path program 2 times [2023-03-31 23:28:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:28:46,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557064857] [2023-03-31 23:28:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:28:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:28:46,983 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:28:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547989113] [2023-03-31 23:28:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:28:46,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:28:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:28:46,987 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) [2023-03-31 23:28:46,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:28:47,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:28:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:28:47,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:28:47,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:28:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:28:47,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:28:51,226 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false