/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/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:11:04,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:11:04,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:11:04,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:11:04,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:11:04,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:11:04,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:11:04,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:11:04,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:11:04,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:11:04,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:11:04,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:11:04,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:11:04,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:11:04,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:11:04,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:11:04,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:11:04,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:11:04,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:11:04,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:11:04,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:11:04,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:11:04,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:11:04,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:11:04,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:11:04,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:11:04,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:11:04,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:11:04,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:11:04,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:11:04,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:11:04,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:11:04,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:11:04,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:11:04,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:11:04,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:11:04,745 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 23:11:04,768 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:11:04,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:11:04,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:11:04,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:11:04,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:11:04,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:11:04,770 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:11:04,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:11:04,770 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:11:04,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:11:04,770 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:11:04,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:11:04,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:11:04,771 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:11:04,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:11:04,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:11:04,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:11:04,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:11:04,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:11:04,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:11:04,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:11:04,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:11:04,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:11:04,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:11:04,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:11:04,980 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:11:04,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-03-31 23:11:06,017 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:11:06,136 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:11:06,136 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound50.c [2023-03-31 23:11:06,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af736fe1/9ab8b3a8b4614a49ab146556a8803496/FLAG274359bec [2023-03-31 23:11:06,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af736fe1/9ab8b3a8b4614a49ab146556a8803496 [2023-03-31 23:11:06,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:11:06,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:11:06,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:11:06,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:11:06,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:11:06,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ac463e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06, skipping insertion in model container [2023-03-31 23:11:06,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:11:06,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:11:06,257 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/cohencu-ll_valuebound50.c[588,601] [2023-03-31 23:11:06,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:11:06,276 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:11:06,283 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/cohencu-ll_valuebound50.c[588,601] [2023-03-31 23:11:06,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:11:06,296 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:11:06,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06 WrapperNode [2023-03-31 23:11:06,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:11:06,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:11:06,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:11:06,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:11:06,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:11:06,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:11:06,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:11:06,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:11:06,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (1/1) ... [2023-03-31 23:11:06,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:11:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:06,340 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 23:11:06,345 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 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:11:06,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:11:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:11:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:11:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:11:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:11:06,416 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:11:06,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:11:06,540 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:11:06,554 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:11:06,555 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:11:06,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:11:06 BoogieIcfgContainer [2023-03-31 23:11:06,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:11:06,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:11:06,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:11:06,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:11:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:11:06" (1/3) ... [2023-03-31 23:11:06,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f52d22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:11:06, skipping insertion in model container [2023-03-31 23:11:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:06" (2/3) ... [2023-03-31 23:11:06,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f52d22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:11:06, skipping insertion in model container [2023-03-31 23:11:06,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:11:06" (3/3) ... [2023-03-31 23:11:06,561 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2023-03-31 23:11:06,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:11:06,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:11:06,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:11:06,616 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;@57c8be56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:11:06,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:11:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:11:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:11:06,625 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:06,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:06,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:06,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash -36751625, now seen corresponding path program 1 times [2023-03-31 23:11:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:06,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967154329] [2023-03-31 23:11:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:06,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:11:06,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967154329] [2023-03-31 23:11:06,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967154329] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:11:06,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:11:06,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:11:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989399988] [2023-03-31 23:11:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:11:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:11:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:11:07,022 INFO L87 Difference]: Start difference. First operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:11:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:07,111 INFO L93 Difference]: Finished difference Result 59 states and 94 transitions. [2023-03-31 23:11:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:11:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-03-31 23:11:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:07,118 INFO L225 Difference]: With dead ends: 59 [2023-03-31 23:11:07,118 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 23:11:07,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:11:07,125 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:07,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:11:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 23:11:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 23:11:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:11:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-03-31 23:11:07,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2023-03-31 23:11:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:07,161 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-03-31 23:11:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:11:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-03-31 23:11:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 23:11:07,162 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:07,162 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:11:07,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:07,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 726531578, now seen corresponding path program 1 times [2023-03-31 23:11:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:07,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299463026] [2023-03-31 23:11:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:07,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:07,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855795374] [2023-03-31 23:11:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:07,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:07,178 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 23:11:07,202 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 23:11:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:07,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:11:07,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:11:07,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:11:07,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299463026] [2023-03-31 23:11:07,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855795374] [2023-03-31 23:11:07,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855795374] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101629223] [2023-03-31 23:11:07,461 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 23:11:07,462 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:07,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:07,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:07,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:07,542 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:07,721 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-03-31 23:11:07,728 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:07,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:07,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:10,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1101629223] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:11:10,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:10,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-03-31 23:11:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72274080] [2023-03-31 23:11:10,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:11:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:11:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=383, Unknown=1, NotChecked=0, Total=462 [2023-03-31 23:11:10,004 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 23:11:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:10,777 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-03-31 23:11:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:11:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-03-31 23:11:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:10,778 INFO L225 Difference]: With dead ends: 63 [2023-03-31 23:11:10,778 INFO L226 Difference]: Without dead ends: 47 [2023-03-31 23:11:10,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=155, Invalid=714, Unknown=1, NotChecked=0, Total=870 [2023-03-31 23:11:10,780 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 11 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:11:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-03-31 23:11:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-03-31 23:11:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:11:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2023-03-31 23:11:10,797 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 19 [2023-03-31 23:11:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:10,797 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2023-03-31 23:11:10,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 23:11:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2023-03-31 23:11:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 23:11:10,798 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:10,799 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:10,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:11,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:11,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:11,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1549398967, now seen corresponding path program 1 times [2023-03-31 23:11:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:11,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756520724] [2023-03-31 23:11:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:11,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:11,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:11,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416914158] [2023-03-31 23:11:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:11,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:11,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:11,027 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 23:11:11,029 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 23:11:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:11,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 23:11:11,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 23:11:11,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 23:11:11,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756520724] [2023-03-31 23:11:11,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416914158] [2023-03-31 23:11:11,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416914158] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577978852] [2023-03-31 23:11:11,264 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:11:11,264 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:11,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:11,264 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:11,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:11,278 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:11,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:11,674 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:11,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:11,683 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:14,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:14,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:14,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-03-31 23:11:14,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645409689] [2023-03-31 23:11:14,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:11:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:11:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2023-03-31 23:11:14,042 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-03-31 23:11:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:14,415 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2023-03-31 23:11:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:11:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-03-31 23:11:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:14,416 INFO L225 Difference]: With dead ends: 70 [2023-03-31 23:11:14,416 INFO L226 Difference]: Without dead ends: 68 [2023-03-31 23:11:14,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=109, Invalid=702, Unknown=1, NotChecked=0, Total=812 [2023-03-31 23:11:14,418 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:14,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:11:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-03-31 23:11:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2023-03-31 23:11:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:11:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-03-31 23:11:14,433 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 46 [2023-03-31 23:11:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:14,434 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-03-31 23:11:14,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-03-31 23:11:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-03-31 23:11:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:11:14,435 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:14,435 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:14,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:11:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 23:11:14,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1775784186, now seen corresponding path program 2 times [2023-03-31 23:11:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068526500] [2023-03-31 23:11:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:14,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:14,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968664566] [2023-03-31 23:11:14,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:11:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:14,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:14,678 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 23:11:14,680 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 23:11:14,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 23:11:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:11:14,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:11:14,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-31 23:11:14,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-31 23:11:14,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:14,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068526500] [2023-03-31 23:11:14,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:14,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968664566] [2023-03-31 23:11:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968664566] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:14,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294416618] [2023-03-31 23:11:14,847 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:11:14,847 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:14,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:14,847 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:14,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:14,857 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:15,159 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:15,163 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:15,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:15,176 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:17,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1325#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:17,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:17,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:17,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 23:11:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317446999] [2023-03-31 23:11:17,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:11:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:11:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=477, Unknown=1, NotChecked=0, Total=552 [2023-03-31 23:11:17,489 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 23:11:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:17,654 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2023-03-31 23:11:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:11:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2023-03-31 23:11:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:17,655 INFO L225 Difference]: With dead ends: 91 [2023-03-31 23:11:17,655 INFO L226 Difference]: Without dead ends: 89 [2023-03-31 23:11:17,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=87, Invalid=562, Unknown=1, NotChecked=0, Total=650 [2023-03-31 23:11:17,656 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:17,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 103 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-03-31 23:11:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2023-03-31 23:11:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 39 states have internal predecessors, (39), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2023-03-31 23:11:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2023-03-31 23:11:17,678 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 51 [2023-03-31 23:11:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2023-03-31 23:11:17,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-03-31 23:11:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2023-03-31 23:11:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 23:11:17,679 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:17,679 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:17,686 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 23:11:17,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:17,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:17,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1077796183, now seen corresponding path program 3 times [2023-03-31 23:11:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:17,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303310971] [2023-03-31 23:11:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:17,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979437368] [2023-03-31 23:11:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:11:17,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:17,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:17,891 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 23:11:17,893 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 23:11:17,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:11:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:11:17,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 23:11:17,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:11:18,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:11:18,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303310971] [2023-03-31 23:11:18,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979437368] [2023-03-31 23:11:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979437368] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203710867] [2023-03-31 23:11:18,302 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:11:18,302 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:18,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:18,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:18,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:18,314 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:18,683 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:18,685 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:18,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:18,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:19,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1961#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:19,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:19,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-03-31 23:11:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232881044] [2023-03-31 23:11:19,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:11:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:11:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:11:19,064 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-31 23:11:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:20,166 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-03-31 23:11:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:11:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 56 [2023-03-31 23:11:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:20,168 INFO L225 Difference]: With dead ends: 98 [2023-03-31 23:11:20,168 INFO L226 Difference]: Without dead ends: 91 [2023-03-31 23:11:20,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:11:20,169 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:20,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 23:11:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-03-31 23:11:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-03-31 23:11:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 48 states have (on average 1.0625) internal successors, (51), 51 states have internal predecessors, (51), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-03-31 23:11:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-03-31 23:11:20,220 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 56 [2023-03-31 23:11:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-03-31 23:11:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-03-31 23:11:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-03-31 23:11:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 23:11:20,222 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:20,222 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:20,230 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 23:11:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:20,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:20,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash -72955691, now seen corresponding path program 1 times [2023-03-31 23:11:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:20,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402093987] [2023-03-31 23:11:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:20,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178139684] [2023-03-31 23:11:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:20,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:20,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:20,465 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 23:11:20,485 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 23:11:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:20,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 23:11:20,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-31 23:11:20,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-31 23:11:20,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:20,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402093987] [2023-03-31 23:11:20,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:20,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178139684] [2023-03-31 23:11:20,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178139684] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094236371] [2023-03-31 23:11:20,956 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:11:20,956 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:20,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:20,956 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:20,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:20,966 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:21,246 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:21,248 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:21,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:21,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:21,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2712#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:21,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:21,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:21,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-03-31 23:11:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408773769] [2023-03-31 23:11:21,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:21,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:11:21,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:11:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:11:21,726 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-03-31 23:11:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:22,166 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2023-03-31 23:11:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:11:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 72 [2023-03-31 23:11:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:22,167 INFO L225 Difference]: With dead ends: 108 [2023-03-31 23:11:22,167 INFO L226 Difference]: Without dead ends: 106 [2023-03-31 23:11:22,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:11:22,168 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:22,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 127 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:11:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-03-31 23:11:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-03-31 23:11:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-03-31 23:11:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2023-03-31 23:11:22,208 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 72 [2023-03-31 23:11:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:22,209 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2023-03-31 23:11:22,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-03-31 23:11:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2023-03-31 23:11:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 23:11:22,209 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:22,210 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:22,224 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 23:11:22,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:22,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:22,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 638285148, now seen corresponding path program 1 times [2023-03-31 23:11:22,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:22,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255634675] [2023-03-31 23:11:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:22,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:22,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866613710] [2023-03-31 23:11:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:22,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:22,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:22,425 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 23:11:22,438 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 23:11:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:22,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 23:11:22,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-03-31 23:11:22,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:22,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255634675] [2023-03-31 23:11:22,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:22,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866613710] [2023-03-31 23:11:22,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866613710] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:11:22,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345285247] [2023-03-31 23:11:22,750 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:11:22,750 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:22,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:22,751 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:22,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:22,761 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:23,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:23,055 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:23,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:23,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:23,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3430#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:23,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:23,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:11:23,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 23:11:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483966547] [2023-03-31 23:11:23,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:11:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:11:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:11:23,459 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 23:11:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:23,610 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2023-03-31 23:11:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:11:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 77 [2023-03-31 23:11:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:23,611 INFO L225 Difference]: With dead ends: 110 [2023-03-31 23:11:23,611 INFO L226 Difference]: Without dead ends: 101 [2023-03-31 23:11:23,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:11:23,612 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:23,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-03-31 23:11:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-03-31 23:11:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-03-31 23:11:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2023-03-31 23:11:23,639 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 77 [2023-03-31 23:11:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:23,639 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2023-03-31 23:11:23,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 23:11:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2023-03-31 23:11:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 23:11:23,640 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:23,640 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:23,652 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 23:11:23,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:23,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:23,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 914576601, now seen corresponding path program 2 times [2023-03-31 23:11:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:23,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638121714] [2023-03-31 23:11:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:23,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:23,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323177197] [2023-03-31 23:11:23,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:11:23,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:23,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:23,877 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 23:11:23,932 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 23:11:23,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:11:23,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:11:23,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-31 23:11:23,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-03-31 23:11:24,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-03-31 23:11:25,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638121714] [2023-03-31 23:11:25,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323177197] [2023-03-31 23:11:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323177197] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:25,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39087393] [2023-03-31 23:11:25,097 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:11:25,097 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:25,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:25,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:25,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:25,106 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:25,375 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:25,377 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:25,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:25,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:25,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4407#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:25,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:25,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:25,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-03-31 23:11:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416686759] [2023-03-31 23:11:25,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:25,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 23:11:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 23:11:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:11:25,916 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 10 states have call predecessors, (37), 9 states have call successors, (37) [2023-03-31 23:11:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:28,619 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2023-03-31 23:11:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 23:11:28,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 10 states have call predecessors, (37), 9 states have call successors, (37) Word has length 104 [2023-03-31 23:11:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:28,620 INFO L225 Difference]: With dead ends: 145 [2023-03-31 23:11:28,620 INFO L226 Difference]: Without dead ends: 135 [2023-03-31 23:11:28,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=256, Invalid=1550, Unknown=0, NotChecked=0, Total=1806 [2023-03-31 23:11:28,621 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:28,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 107 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 23:11:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-03-31 23:11:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-03-31 23:11:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 72 states have internal predecessors, (75), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 23:11:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2023-03-31 23:11:28,665 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 104 [2023-03-31 23:11:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:28,666 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2023-03-31 23:11:28,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (37), 10 states have call predecessors, (37), 9 states have call successors, (37) [2023-03-31 23:11:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2023-03-31 23:11:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-31 23:11:28,667 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:28,667 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:28,672 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 23:11:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:28,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:28,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:28,872 INFO L85 PathProgramCache]: Analyzing trace with hash 211428058, now seen corresponding path program 4 times [2023-03-31 23:11:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:28,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185777314] [2023-03-31 23:11:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:28,878 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:28,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43781989] [2023-03-31 23:11:28,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:11:28,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:28,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:28,883 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 23:11:28,885 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 23:11:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:28,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2023-03-31 23:11:28,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 77 proven. 80 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-03-31 23:11:29,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-03-31 23:11:29,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185777314] [2023-03-31 23:11:29,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43781989] [2023-03-31 23:11:29,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43781989] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:29,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1145498834] [2023-03-31 23:11:29,611 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:11:29,611 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:29,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:29,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:29,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:29,620 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:29,864 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:29,866 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:29,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:29,873 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:30,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5515#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:30,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:30,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:30,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-03-31 23:11:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29046332] [2023-03-31 23:11:30,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:30,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-31 23:11:30,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-31 23:11:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:11:30,299 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) [2023-03-31 23:11:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:31,266 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2023-03-31 23:11:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:11:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) Word has length 105 [2023-03-31 23:11:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:31,269 INFO L225 Difference]: With dead ends: 145 [2023-03-31 23:11:31,269 INFO L226 Difference]: Without dead ends: 143 [2023-03-31 23:11:31,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 23:11:31,270 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:31,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 143 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:11:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-03-31 23:11:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2023-03-31 23:11:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 23:11:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2023-03-31 23:11:31,350 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 105 [2023-03-31 23:11:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:31,351 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2023-03-31 23:11:31,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 11 states have call predecessors, (36), 10 states have call successors, (36) [2023-03-31 23:11:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2023-03-31 23:11:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-31 23:11:31,366 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:31,366 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:31,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:31,566 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,SelfDestructingSolverStorable8 [2023-03-31 23:11:31,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:31,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash 769975029, now seen corresponding path program 2 times [2023-03-31 23:11:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:31,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104237579] [2023-03-31 23:11:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:31,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:31,574 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:31,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173809060] [2023-03-31 23:11:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:11:31,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:31,577 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 23:11:31,578 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 23:11:31,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:11:31,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:11:31,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 23:11:31,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2023-03-31 23:11:32,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:32,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104237579] [2023-03-31 23:11:32,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173809060] [2023-03-31 23:11:32,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173809060] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:11:32,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081074565] [2023-03-31 23:11:32,209 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:11:32,209 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:32,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:32,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:32,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:32,233 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:32,523 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:32,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:32,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:32,532 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:32,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6379#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:32,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:32,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:11:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 23:11:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811826461] [2023-03-31 23:11:32,971 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:11:32,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:11:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:11:32,972 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-31 23:11:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:33,777 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2023-03-31 23:11:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:11:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 126 [2023-03-31 23:11:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:33,778 INFO L225 Difference]: With dead ends: 145 [2023-03-31 23:11:33,778 INFO L226 Difference]: Without dead ends: 143 [2023-03-31 23:11:33,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:11:33,779 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:33,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 23:11:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-03-31 23:11:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-03-31 23:11:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 78 states have internal predecessors, (81), 45 states have call successors, (45), 22 states have call predecessors, (45), 21 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 23:11:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2023-03-31 23:11:33,832 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 126 [2023-03-31 23:11:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:33,833 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2023-03-31 23:11:33,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2023-03-31 23:11:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2023-03-31 23:11:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 23:11:33,834 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:33,834 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:33,845 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 23:11:34,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:11:34,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:34,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash 363433749, now seen corresponding path program 1 times [2023-03-31 23:11:34,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:34,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432404653] [2023-03-31 23:11:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:34,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:34,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:34,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403559690] [2023-03-31 23:11:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:34,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:34,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:34,047 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 23:11:34,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 23:11:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:34,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 23:11:34,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 104 proven. 110 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-03-31 23:11:34,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:40,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432404653] [2023-03-31 23:11:40,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403559690] [2023-03-31 23:11:40,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403559690] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:11:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [110563425] [2023-03-31 23:11:40,794 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-03-31 23:11:40,794 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:40,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:40,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:40,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:40,806 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:41,123 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:41,125 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-03-31 23:11:41,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:41,131 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:42,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7483#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:42,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:42,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:11:42,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 23:11:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463802895] [2023-03-31 23:11:42,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:11:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:11:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=920, Unknown=2, NotChecked=0, Total=1056 [2023-03-31 23:11:42,628 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2023-03-31 23:11:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:42,990 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2023-03-31 23:11:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:11:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 136 [2023-03-31 23:11:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:42,992 INFO L225 Difference]: With dead ends: 169 [2023-03-31 23:11:42,992 INFO L226 Difference]: Without dead ends: 151 [2023-03-31 23:11:42,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=153, Invalid=1035, Unknown=2, NotChecked=0, Total=1190 [2023-03-31 23:11:42,993 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:42,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:11:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-03-31 23:11:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-03-31 23:11:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-03-31 23:11:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2023-03-31 23:11:43,069 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 136 [2023-03-31 23:11:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:43,069 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2023-03-31 23:11:43,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 7 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2023-03-31 23:11:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2023-03-31 23:11:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-03-31 23:11:43,071 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:43,071 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:43,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:43,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 23:11:43,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:43,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -858481288, now seen corresponding path program 2 times [2023-03-31 23:11:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:43,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773466640] [2023-03-31 23:11:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:43,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:43,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517131046] [2023-03-31 23:11:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:11:43,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:43,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:11:43,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 23:11:44,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:11:44,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:11:44,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 62 conjunts are in the unsatisfiable core [2023-03-31 23:11:44,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:12:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 428 proven. 75 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2023-03-31 23:12:20,620 INFO L327 TraceCheckSpWp]: Computing backward predicates...