/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/ps6-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:30:29,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:30:29,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:30:29,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:30:29,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:30:29,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:30:29,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:30:29,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:30:29,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:30:29,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:30:29,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:30:29,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:30:29,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:30:29,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:30:29,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:30:29,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:30:29,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:30:29,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:30:29,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:30:29,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:30:29,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:30:29,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:30:29,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:30:29,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:30:29,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:30:29,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:30:29,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:30:29,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:30:29,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:30:29,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:30:29,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:30:29,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:30:29,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:30:29,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:30:29,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:30:29,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:30:29,378 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 23:30:29,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:30:29,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:30:29,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:30:29,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:30:29,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:30:29,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:30:29,403 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:30:29,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:30:29,403 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:30:29,403 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:30:29,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:30:29,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:30:29,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:30:29,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:30:29,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:30:29,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:30:29,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:30:29,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:30:29,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:30:29,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:30:29,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:30:29,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:30:29,619 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:30:29,619 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:30:29,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound20.c [2023-03-31 23:30:30,652 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:30:30,816 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:30:30,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound20.c [2023-03-31 23:30:30,821 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fd7f114/e36253f71aad4eaaa0e721c03d79ca05/FLAGb1404cbbc [2023-03-31 23:30:30,836 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fd7f114/e36253f71aad4eaaa0e721c03d79ca05 [2023-03-31 23:30:30,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:30:30,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:30:30,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:30:30,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:30:30,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:30:30,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:30:30" (1/1) ... [2023-03-31 23:30:30,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f5675d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:30, skipping insertion in model container [2023-03-31 23:30:30,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:30:30" (1/1) ... [2023-03-31 23:30:30,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:30:30,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:30:30,966 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/ps6-ll_valuebound20.c[458,471] [2023-03-31 23:30:30,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:30:30,989 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:30:30,997 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/ps6-ll_valuebound20.c[458,471] [2023-03-31 23:30:31,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:30:31,010 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:30:31,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31 WrapperNode [2023-03-31 23:30:31,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:30:31,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:30:31,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:30:31,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:30:31,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:30:31,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:30:31,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:30:31,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:30:31,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (1/1) ... [2023-03-31 23:30:31,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:30:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:31,051 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 23:30:31,053 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 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:30:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:30:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:30:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:30:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:30:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:30:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:30:31,135 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:30:31,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:30:31,237 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:30:31,252 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:30:31,252 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:30:31,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:30:31 BoogieIcfgContainer [2023-03-31 23:30:31,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:30:31,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:30:31,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:30:31,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:30:31,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:30:30" (1/3) ... [2023-03-31 23:30:31,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305cf8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:30:31, skipping insertion in model container [2023-03-31 23:30:31,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:30:31" (2/3) ... [2023-03-31 23:30:31,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305cf8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:30:31, skipping insertion in model container [2023-03-31 23:30:31,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:30:31" (3/3) ... [2023-03-31 23:30:31,259 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.c [2023-03-31 23:30:31,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:30:31,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:30:31,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:30:31,313 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;@73ba5d9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:30:31,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:30:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 23:30:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 23:30:31,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:31,322 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:31,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:31,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 395619074, now seen corresponding path program 1 times [2023-03-31 23:30:31,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:31,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075050416] [2023-03-31 23:30:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:31,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:31,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244188497] [2023-03-31 23:30:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:31,401 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 23:30:31,402 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 23:30:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:30:31,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 23:30:31,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:30:31,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:30:31,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:31,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075050416] [2023-03-31 23:30:31,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:31,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244188497] [2023-03-31 23:30:31,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244188497] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:30:31,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:30:31,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:30:31,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805243694] [2023-03-31 23:30:31,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:30:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:30:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:30:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:30:31,645 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:30:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:31,714 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-03-31 23:30:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:30:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 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 17 [2023-03-31 23:30:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:31,720 INFO L225 Difference]: With dead ends: 51 [2023-03-31 23:30:31,720 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 23:30:31,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:30:31,724 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:31,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:30:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 23:30:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 23:30:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:30:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-03-31 23:30:31,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2023-03-31 23:30:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:31,753 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-03-31 23:30:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:30:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-03-31 23:30:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:30:31,755 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:31,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:31,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:30:31,961 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 23:30:31,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:31,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash 398349892, now seen corresponding path program 1 times [2023-03-31 23:30:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:31,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422841223] [2023-03-31 23:30:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:31,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:31,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:31,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867838344] [2023-03-31 23:30:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:31,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:31,994 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 23:30:31,997 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 23:30:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:30:32,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:30:32,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:30:32,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:30:34,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422841223] [2023-03-31 23:30:34,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867838344] [2023-03-31 23:30:34,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867838344] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:30:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556187982] [2023-03-31 23:30:34,437 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:30:34,438 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:34,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:34,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:34,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:34,496 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:34,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-03-31 23:30:34,873 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:34,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:34,882 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:39,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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_11 Int)) (and (or (and (<= v_main_~k~0_BEFORE_CALL_11 20) (= v_main_~y~0_BEFORE_CALL_11 0) (= v_main_~x~0_BEFORE_CALL_11 0) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= v_main_~c~0_BEFORE_CALL_7 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= v_main_~k~0_BEFORE_CALL_11 20) (<= 1 v_main_~y~0_BEFORE_CALL_11) (<= v_main_~c~0_BEFORE_CALL_7 21) (<= 1 v_main_~x~0_BEFORE_CALL_11) (<= 0 v_main_~k~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (<= 1 v_main_~c~0_BEFORE_CALL_7) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (not (= (+ (* v_main_~x~0_BEFORE_CALL_11 12) (* 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) 6) (* (* 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) 2) (* 5 (* 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))))))))' at error location [2023-03-31 23:30:39,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:39,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:30:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-03-31 23:30:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110548275] [2023-03-31 23:30:39,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:39,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:30:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:30:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=424, Unknown=3, NotChecked=0, Total=506 [2023-03-31 23:30:39,772 INFO L87 Difference]: Start difference. First operand 28 states and 31 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, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:30:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:39,907 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-03-31 23:30:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:30:39,907 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, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-03-31 23:30:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:39,908 INFO L225 Difference]: With dead ends: 39 [2023-03-31 23:30:39,908 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 23:30:39,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=96, Invalid=501, Unknown=3, NotChecked=0, Total=600 [2023-03-31 23:30:39,910 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:39,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:30:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 23:30:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-03-31 23:30:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:30:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-03-31 23:30:39,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2023-03-31 23:30:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:39,917 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-03-31 23:30:39,917 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, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:30:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-03-31 23:30:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 23:30:39,918 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:39,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:39,937 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 23:30:40,140 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 23:30:40,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:40,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2024645172, now seen corresponding path program 1 times [2023-03-31 23:30:40,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:40,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154794747] [2023-03-31 23:30:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:40,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91961478] [2023-03-31 23:30:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:40,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:40,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:40,185 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 23:30:40,186 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 23:30:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:30:40,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:30:40,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 23:30:40,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:40,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154794747] [2023-03-31 23:30:40,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91961478] [2023-03-31 23:30:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91961478] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:30:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337727790] [2023-03-31 23:30:40,547 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:40,547 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:40,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:40,548 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:40,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:40,560 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:40,690 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:40,693 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:40,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:40,709 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:41,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '645#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:41,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:41,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:30:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 23:30:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120505657] [2023-03-31 23:30:41,020 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:30:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:30:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:30:41,021 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 23:30:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:41,131 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-03-31 23:30:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:30:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2023-03-31 23:30:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:41,132 INFO L225 Difference]: With dead ends: 43 [2023-03-31 23:30:41,132 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 23:30:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:30:41,133 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:30:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 23:30:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-31 23:30:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 23:30:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-03-31 23:30:41,139 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 35 [2023-03-31 23:30:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:41,139 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-03-31 23:30:41,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 23:30:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-03-31 23:30:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 23:30:41,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:41,140 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:41,147 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 23:30:41,344 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 23:30:41,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:41,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash -170934026, now seen corresponding path program 2 times [2023-03-31 23:30:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555476767] [2023-03-31 23:30:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:41,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:41,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394193995] [2023-03-31 23:30:41,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:30:41,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:41,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:41,362 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 23:30:41,377 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 23:30:41,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:30:41,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:30:41,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:30:41,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 23:30:41,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:30:41,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555476767] [2023-03-31 23:30:41,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394193995] [2023-03-31 23:30:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394193995] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:30:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362596938] [2023-03-31 23:30:41,763 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:41,763 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:41,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:41,763 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:41,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:41,775 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:41,907 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:41,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:41,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:41,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:42,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:42,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:42,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:30:42,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-03-31 23:30:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424023669] [2023-03-31 23:30:42,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:42,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:30:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:30:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:30:42,331 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-31 23:30:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:42,674 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-03-31 23:30:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 23:30:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 42 [2023-03-31 23:30:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:42,675 INFO L225 Difference]: With dead ends: 55 [2023-03-31 23:30:42,675 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 23:30:42,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:30:42,676 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:42,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:30:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 23:30:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-03-31 23:30:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:30:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-03-31 23:30:42,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 42 [2023-03-31 23:30:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:42,686 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-03-31 23:30:42,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 9 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-31 23:30:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-03-31 23:30:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 23:30:42,687 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:42,687 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:42,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:30:42,892 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 [2023-03-31 23:30:42,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:42,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1677453900, now seen corresponding path program 3 times [2023-03-31 23:30:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:42,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442228403] [2023-03-31 23:30:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:42,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:42,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712936534] [2023-03-31 23:30:42,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:30:42,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:42,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:42,915 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) [2023-03-31 23:30:42,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:30:42,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:30:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:30:42,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:30:42,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-03-31 23:30:43,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:43,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442228403] [2023-03-31 23:30:43,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712936534] [2023-03-31 23:30:43,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712936534] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:30:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910073545] [2023-03-31 23:30:43,209 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:43,209 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:43,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:43,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:43,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:43,219 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:43,353 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:43,357 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:43,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:43,361 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:43,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1488#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:43,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:43,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:30:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-03-31 23:30:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99214962] [2023-03-31 23:30:43,679 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:43,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:30:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:30:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:30:43,681 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-03-31 23:30:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:43,819 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-03-31 23:30:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:30:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 63 [2023-03-31 23:30:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:43,821 INFO L225 Difference]: With dead ends: 55 [2023-03-31 23:30:43,821 INFO L226 Difference]: Without dead ends: 49 [2023-03-31 23:30:43,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:30:43,822 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:43,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 203 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:30:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-03-31 23:30:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-03-31 23:30:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 23:30:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-03-31 23:30:43,834 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 63 [2023-03-31 23:30:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:43,835 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-03-31 23:30:43,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-03-31 23:30:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-03-31 23:30:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 23:30:43,844 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:43,844 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:43,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:30:44,045 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 [2023-03-31 23:30:44,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:44,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1653056138, now seen corresponding path program 4 times [2023-03-31 23:30:44,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141646562] [2023-03-31 23:30:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:44,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:44,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463452774] [2023-03-31 23:30:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:30:44,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:44,059 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) [2023-03-31 23:30:44,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:30:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:30:44,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 23:30:44,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-03-31 23:30:44,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:44,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141646562] [2023-03-31 23:30:44,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463452774] [2023-03-31 23:30:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463452774] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:30:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115423809] [2023-03-31 23:30:44,500 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:44,500 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:44,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:44,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:44,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:44,537 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:44,626 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:44,631 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:44,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:44,635 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:45,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1944#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:45,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:45,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:30:45,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-03-31 23:30:45,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917680780] [2023-03-31 23:30:45,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:45,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:30:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:30:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:30:45,056 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:30:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:45,438 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-03-31 23:30:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:30:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2023-03-31 23:30:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:45,439 INFO L225 Difference]: With dead ends: 58 [2023-03-31 23:30:45,439 INFO L226 Difference]: Without dead ends: 52 [2023-03-31 23:30:45,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:30:45,440 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:45,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 222 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:30:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-03-31 23:30:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-03-31 23:30:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:30:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2023-03-31 23:30:45,451 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 70 [2023-03-31 23:30:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:45,452 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2023-03-31 23:30:45,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 23:30:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2023-03-31 23:30:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 23:30:45,452 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:45,452 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:45,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:30:45,657 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 [2023-03-31 23:30:45,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:45,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -40224908, now seen corresponding path program 5 times [2023-03-31 23:30:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918346849] [2023-03-31 23:30:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:45,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:45,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:45,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870090221] [2023-03-31 23:30:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:30:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:45,685 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) [2023-03-31 23:30:45,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:30:46,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-03-31 23:30:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:30:46,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 23:30:46,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-03-31 23:30:46,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:46,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918346849] [2023-03-31 23:30:46,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870090221] [2023-03-31 23:30:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870090221] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:30:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669550635] [2023-03-31 23:30:46,375 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:46,375 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:46,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:46,375 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:46,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:46,387 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:46,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:46,479 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:46,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:46,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:46,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2432#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:46,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:46,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:30:46,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-03-31 23:30:46,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462444485] [2023-03-31 23:30:46,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:46,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:30:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:30:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:30:46,830 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-31 23:30:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:47,102 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-03-31 23:30:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 23:30:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 77 [2023-03-31 23:30:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:47,103 INFO L225 Difference]: With dead ends: 61 [2023-03-31 23:30:47,103 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 23:30:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:30:47,104 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:47,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 253 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:30:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 23:30:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-03-31 23:30:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 23:30:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-03-31 23:30:47,113 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 77 [2023-03-31 23:30:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:47,113 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-03-31 23:30:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-03-31 23:30:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-03-31 23:30:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-03-31 23:30:47,119 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:47,119 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:47,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:30:47,342 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 [2023-03-31 23:30:47,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:47,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1456260022, now seen corresponding path program 6 times [2023-03-31 23:30:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434565029] [2023-03-31 23:30:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:47,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:47,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308905953] [2023-03-31 23:30:47,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:30:47,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:47,373 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) [2023-03-31 23:30:47,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:30:47,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:30:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:30:47,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 44 conjunts are in the unsatisfiable core [2023-03-31 23:30:47,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-03-31 23:30:47,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:48,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:30:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434565029] [2023-03-31 23:30:48,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:30:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308905953] [2023-03-31 23:30:48,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308905953] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:30:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904175561] [2023-03-31 23:30:48,144 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:30:48,144 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:30:48,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:30:48,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:30:48,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:30:48,153 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:30:48,262 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:30:48,264 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:30:48,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:30:48,268 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:30:48,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3105#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:30:48,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:30:48,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:30:48,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-03-31 23:30:48,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669556198] [2023-03-31 23:30:48,720 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:30:48,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:30:48,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:30:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:30:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 23:30:48,721 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-03-31 23:30:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:30:48,993 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-03-31 23:30:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:30:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 84 [2023-03-31 23:30:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:30:48,994 INFO L225 Difference]: With dead ends: 64 [2023-03-31 23:30:48,994 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 23:30:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 23:30:48,995 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:30:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 291 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:30:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 23:30:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-03-31 23:30:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:30:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-03-31 23:30:49,004 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 84 [2023-03-31 23:30:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:30:49,005 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-03-31 23:30:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-03-31 23:30:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-03-31 23:30:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 23:30:49,005 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:30:49,005 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:30:49,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 23:30:49,210 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 [2023-03-31 23:30:49,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:30:49,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:30:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1913501388, now seen corresponding path program 7 times [2023-03-31 23:30:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:30:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284984755] [2023-03-31 23:30:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:30:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:30:49,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:30:49,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801496882] [2023-03-31 23:30:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:30:49,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:30:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:30:49,219 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) [2023-03-31 23:30:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:30:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:30:49,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 23:30:49,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:30:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 51 proven. 136 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-03-31 23:30:49,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:30:53,898 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-03-31 23:31:13,953 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_168 Int) (v_main_~y~0_BEFORE_CALL_158 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 10) .cse0 (* 7 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158) (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 6)) 12) 0) (= .cse0 (* v_main_~k~0_BEFORE_CALL_168 v_main_~y~0_BEFORE_CALL_158)))))) is different from true [2023-03-31 23:31:32,058 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((v_main_~k~0_BEFORE_CALL_168 Int) (v_main_~y~0_BEFORE_CALL_158 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 10) .cse0 (* 7 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158) (* v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 v_main_~y~0_BEFORE_CALL_158 6)) 12) 0) (= .cse0 (* v_main_~k~0_BEFORE_CALL_168 v_main_~y~0_BEFORE_CALL_158)))))) is different from true [2023-03-31 23:31:36,083 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (< c_main_~c~0 c_main_~k~0) (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-03-31 23:31:44,177 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 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) .cse0 1)))))) is different from false [2023-03-31 23:31:46,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:31:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284984755] [2023-03-31 23:31:46,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:31:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801496882] [2023-03-31 23:31:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801496882] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:31:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352061470] [2023-03-31 23:31:46,221 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:31:46,221 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:31:46,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:31:46,221 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:31:46,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:31:46,260 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:31:46,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:31:46,452 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 13 for LOIs [2023-03-31 23:31:46,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:31:46,456 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:31:46,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3660#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:31:46,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:31:46,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:31:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-03-31 23:31:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826644514] [2023-03-31 23:31:46,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:31:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:31:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:31:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:31:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=794, Unknown=5, NotChecked=300, Total=1190 [2023-03-31 23:31:46,812 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-03-31 23:31:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:31:47,160 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-03-31 23:31:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 23:31:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 91 [2023-03-31 23:31:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:31:47,161 INFO L225 Difference]: With dead ends: 67 [2023-03-31 23:31:47,161 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 23:31:47,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=104, Invalid=903, Unknown=5, NotChecked=320, Total=1332 [2023-03-31 23:31:47,162 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:31:47,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:31:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 23:31:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-03-31 23:31:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:31:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-03-31 23:31:47,176 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 91 [2023-03-31 23:31:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:31:47,176 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-03-31 23:31:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-03-31 23:31:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-03-31 23:31:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 23:31:47,179 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:31:47,179 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:31:47,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:31:47,386 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 [2023-03-31 23:31:47,386 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:31:47,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:31:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 273758710, now seen corresponding path program 8 times [2023-03-31 23:31:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:31:47,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684253218] [2023-03-31 23:31:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:31:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:31:47,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:31:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418842192] [2023-03-31 23:31:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:31:47,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:31:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:31:47,404 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) [2023-03-31 23:31:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process