/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:14:51,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:14:51,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:14:51,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:14:51,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:14:51,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:14:51,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:14:51,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:14:51,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:14:51,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:14:51,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:14:51,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:14:51,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:14:51,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:14:51,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:14:51,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:14:51,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:14:51,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:14:51,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:14:51,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:14:51,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:14:51,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:14:51,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:14:51,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:14:51,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:14:51,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:14:51,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:14:51,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:14:51,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:14:51,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:14:51,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:14:51,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:14:51,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:14:51,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:14:51,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:14:51,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:14:51,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:14:51,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:14:51,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:14:51,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:14:51,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:14:51,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:14:51,239 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:14:51,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:14:51,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:14:51,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:14:51,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:14:51,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:14:51,240 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:14:51,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:14:51,241 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:14:51,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:14:51,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:14:51,242 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:14:51,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:14:51,242 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:14:51,243 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:14:51,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:14:51,244 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:14:51,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:14:51,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:14:51,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:14:51,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:14:51,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:14:51,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:14:51,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:14:51,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:14:51,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:14:51,437 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:14:51,438 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:14:51,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-04-01 11:14:52,448 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:14:52,651 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:14:52,652 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-04-01 11:14:52,657 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e9634ce/7bd8ed9103f14282a442c0541100a028/FLAG72e4a41d3 [2023-04-01 11:14:52,668 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91e9634ce/7bd8ed9103f14282a442c0541100a028 [2023-04-01 11:14:52,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:14:52,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:14:52,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:14:52,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:14:52,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:14:52,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c30ebf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52, skipping insertion in model container [2023-04-01 11:14:52,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:14:52,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:14:52,828 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_unwindbound100.c[588,601] [2023-04-01 11:14:52,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:14:52,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:14:52,863 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_unwindbound100.c[588,601] [2023-04-01 11:14:52,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:14:52,881 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:14:52,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52 WrapperNode [2023-04-01 11:14:52,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:14:52,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:14:52,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:14:52,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:14:52,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,918 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:14:52,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:14:52,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:14:52,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:14:52,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (1/1) ... [2023-04-01 11:14:52,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:14:52,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:14:52,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:14:52,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:14:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:14:52,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:14:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:14:53,031 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:14:53,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:14:53,163 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:14:53,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:14:53,177 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:14:53,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:14:53 BoogieIcfgContainer [2023-04-01 11:14:53,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:14:53,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:14:53,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:14:53,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:14:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:14:52" (1/3) ... [2023-04-01 11:14:53,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b985e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:14:53, skipping insertion in model container [2023-04-01 11:14:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:14:52" (2/3) ... [2023-04-01 11:14:53,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b985e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:14:53, skipping insertion in model container [2023-04-01 11:14:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:14:53" (3/3) ... [2023-04-01 11:14:53,184 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2023-04-01 11:14:53,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:14:53,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:14:53,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:14:53,233 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;@481d624a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:14:53,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:14:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 11:14:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 11:14:53,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:14:53,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:14:53,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:14:53,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:14:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1647932821, now seen corresponding path program 1 times [2023-04-01 11:14:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:14:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933401151] [2023-04-01 11:14:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:53,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:14:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:14:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:14:53,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:14:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933401151] [2023-04-01 11:14:53,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933401151] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:14:53,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:14:53,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:14:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523419672] [2023-04-01 11:14:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:14:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:14:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:14:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:14:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:14:53,373 INFO L87 Difference]: Start difference. First operand has 29 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:14:53,390 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2023-04-01 11:14:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:14:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 11:14:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:14:53,396 INFO L225 Difference]: With dead ends: 53 [2023-04-01 11:14:53,396 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 11:14:53,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:14:53,400 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:14:53,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:14:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 11:14:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 11:14:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:14:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2023-04-01 11:14:53,424 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 10 [2023-04-01 11:14:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:14:53,424 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2023-04-01 11:14:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2023-04-01 11:14:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:14:53,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:14:53,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:14:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:14:53,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:14:53,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:14:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -78558798, now seen corresponding path program 1 times [2023-04-01 11:14:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:14:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640635737] [2023-04-01 11:14:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:14:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:14:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:14:53,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:14:53,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640635737] [2023-04-01 11:14:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640635737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:14:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:14:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:14:53,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468191444] [2023-04-01 11:14:53,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:14:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:14:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:14:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:14:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:14:53,523 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:14:53,538 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2023-04-01 11:14:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:14:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:14:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:14:53,539 INFO L225 Difference]: With dead ends: 39 [2023-04-01 11:14:53,539 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 11:14:53,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:14:53,541 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:14:53,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:14:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 11:14:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 11:14:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:14:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-04-01 11:14:53,548 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 11 [2023-04-01 11:14:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:14:53,548 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-04-01 11:14:53,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-04-01 11:14:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:14:53,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:14:53,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:14:53,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:14:53,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:14:53,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:14:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash -77009666, now seen corresponding path program 1 times [2023-04-01 11:14:53,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:14:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479680433] [2023-04-01 11:14:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:14:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:14:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:14:53,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:14:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479680433] [2023-04-01 11:14:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479680433] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:14:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:14:53,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:14:53,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721260414] [2023-04-01 11:14:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:14:53,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:14:53,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:14:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:14:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:14:53,669 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:14:53,723 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 11:14:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:14:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:14:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:14:53,724 INFO L225 Difference]: With dead ends: 33 [2023-04-01 11:14:53,724 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:14:53,724 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 [2023-04-01 11:14:53,725 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:14:53,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:14:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:14:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 11:14:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:14:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-04-01 11:14:53,734 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2023-04-01 11:14:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:14:53,734 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-04-01 11:14:53,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:14:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-04-01 11:14:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 11:14:53,735 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:14:53,735 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:14:53,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 11:14:53,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:14:53,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:14:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1662799058, now seen corresponding path program 1 times [2023-04-01 11:14:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:14:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919255829] [2023-04-01 11:14:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:14:53,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:14:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370329084] [2023-04-01 11:14:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:53,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:14:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:14:53,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:14:53,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:14:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:14:53,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:14:53,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:14:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:14:53,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:14:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:14:54,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:14:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919255829] [2023-04-01 11:14:54,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:14:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370329084] [2023-04-01 11:14:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370329084] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:14:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521361046] [2023-04-01 11:14:54,068 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 11:14:54,068 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:14:54,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:14:54,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:14:54,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:14:54,200 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:14:54,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:14:54,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:14:54,586 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:14:55,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [521361046] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:14:55,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:14:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-01 11:14:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308239231] [2023-04-01 11:14:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:14:55,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:14:55,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:14:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:14:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:14:55,332 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:14:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:14:55,785 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2023-04-01 11:14:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:14:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 11:14:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:14:55,788 INFO L225 Difference]: With dead ends: 53 [2023-04-01 11:14:55,788 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 11:14:55,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:14:55,791 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:14:55,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:14:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 11:14:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 11:14:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:14:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-04-01 11:14:55,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 16 [2023-04-01 11:14:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:14:55,815 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-04-01 11:14:55,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:14:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-04-01 11:14:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 11:14:55,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:14:55,817 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:14:55,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:14:56,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:14:56,022 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:14:56,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:14:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1441032967, now seen corresponding path program 1 times [2023-04-01 11:14:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:14:56,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197217113] [2023-04-01 11:14:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:56,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:14:56,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:14:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697927637] [2023-04-01 11:14:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:14:56,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:14:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:14:56,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:14:56,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:14:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:14:56,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:14:56,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:14:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 11:14:56,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:14:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:14:56,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:14:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197217113] [2023-04-01 11:14:56,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:14:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697927637] [2023-04-01 11:14:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697927637] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:14:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065958963] [2023-04-01 11:14:56,178 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:14:56,178 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:14:56,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:14:56,179 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:14:56,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:14:56,215 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:14:58,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:14:58,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:14:58,683 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:14:59,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '929#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:14:59,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:14:59,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:14:59,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 11:14:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739909504] [2023-04-01 11:14:59,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:14:59,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:14:59,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:14:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:14:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:14:59,896 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 11:15:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:00,006 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-04-01 11:15:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:15:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 44 [2023-04-01 11:15:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:00,009 INFO L225 Difference]: With dead ends: 111 [2023-04-01 11:15:00,009 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 11:15:00,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:15:00,012 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 51 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:00,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 147 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 11:15:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-04-01 11:15:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 40 states have call successors, (40), 10 states have call predecessors, (40), 9 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 11:15:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2023-04-01 11:15:00,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 44 [2023-04-01 11:15:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:00,043 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2023-04-01 11:15:00,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 11:15:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2023-04-01 11:15:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 11:15:00,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:00,046 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:00,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:00,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:00,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1933148283, now seen corresponding path program 1 times [2023-04-01 11:15:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993689758] [2023-04-01 11:15:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:00,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:00,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390241448] [2023-04-01 11:15:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:00,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:00,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:15:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:00,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 11:15:00,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 11:15:00,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 11:15:00,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:00,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993689758] [2023-04-01 11:15:00,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:00,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390241448] [2023-04-01 11:15:00,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390241448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:00,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255921441] [2023-04-01 11:15:00,516 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:15:00,516 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:00,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:00,516 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:00,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:00,537 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:02,725 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:02,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:02,739 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:04,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1547#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:15:04,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:04,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:04,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 11:15:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867367310] [2023-04-01 11:15:04,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:04,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:15:04,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:04,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:15:04,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:15:04,027 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 11:15:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:04,274 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-04-01 11:15:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:15:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 44 [2023-04-01 11:15:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:04,276 INFO L225 Difference]: With dead ends: 109 [2023-04-01 11:15:04,276 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 11:15:04,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:15:04,277 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:04,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:15:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 11:15:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 11:15:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 56 states have internal predecessors, (60), 40 states have call successors, (40), 14 states have call predecessors, (40), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 11:15:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2023-04-01 11:15:04,301 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 44 [2023-04-01 11:15:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:04,303 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2023-04-01 11:15:04,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 11:15:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2023-04-01 11:15:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 11:15:04,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:04,310 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:04,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:04,511 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:04,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:04,511 INFO L85 PathProgramCache]: Analyzing trace with hash -82151627, now seen corresponding path program 2 times [2023-04-01 11:15:04,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:04,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825229296] [2023-04-01 11:15:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:04,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:04,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:04,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043848402] [2023-04-01 11:15:04,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:04,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:04,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:04,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:04,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:15:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 11:15:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:04,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 11:15:04,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 11:15:04,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 11:15:04,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825229296] [2023-04-01 11:15:04,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043848402] [2023-04-01 11:15:04,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043848402] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:04,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186069421] [2023-04-01 11:15:04,757 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:15:04,757 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:04,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:04,757 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:04,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:04,778 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:09,517 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 84#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (< ~counter~0 101) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 86#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (not (= ~counter~0 101)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:09,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 11:15:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917680780] [2023-04-01 11:15:09,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:09,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:15:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:15:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-01 11:15:09,520 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:15:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:09,676 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2023-04-01 11:15:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:15:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 49 [2023-04-01 11:15:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:09,677 INFO L225 Difference]: With dead ends: 121 [2023-04-01 11:15:09,677 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 11:15:09,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:15:09,678 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:09,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 11:15:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-04-01 11:15:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 11:15:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2023-04-01 11:15:09,706 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 49 [2023-04-01 11:15:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:09,721 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2023-04-01 11:15:09,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:15:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2023-04-01 11:15:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 11:15:09,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:09,722 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:09,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:09,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:09,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:09,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1692777595, now seen corresponding path program 3 times [2023-04-01 11:15:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622258646] [2023-04-01 11:15:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:09,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:09,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54799128] [2023-04-01 11:15:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:15:09,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:09,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:09,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:15:09,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:15:09,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:09,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 11:15:09,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 11:15:10,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:11,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622258646] [2023-04-01 11:15:11,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54799128] [2023-04-01 11:15:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54799128] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:15:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500342639] [2023-04-01 11:15:11,394 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:15:11,395 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:11,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:11,395 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:11,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:11,415 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:13,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:13,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:13,374 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:14,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2811#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:15:14,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:14,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:15:14,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-04-01 11:15:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614388754] [2023-04-01 11:15:14,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:14,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:15:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:15:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:15:14,608 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 11:15:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:14,756 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2023-04-01 11:15:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:15:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2023-04-01 11:15:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:14,759 INFO L225 Difference]: With dead ends: 125 [2023-04-01 11:15:14,760 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 11:15:14,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:15:14,767 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:14,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 11:15:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-04-01 11:15:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 68 states have internal predecessors, (72), 38 states have call successors, (38), 18 states have call predecessors, (38), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-01 11:15:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-04-01 11:15:14,795 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 54 [2023-04-01 11:15:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:14,795 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-04-01 11:15:14,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 11:15:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-04-01 11:15:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 11:15:14,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:14,796 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:14,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:15,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:15,012 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:15,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:15,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1446194315, now seen corresponding path program 1 times [2023-04-01 11:15:15,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:15,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018817273] [2023-04-01 11:15:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:15,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:15,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528738999] [2023-04-01 11:15:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:15,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:15,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:15,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:15:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:15,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 11:15:15,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 11:15:15,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:15,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018817273] [2023-04-01 11:15:15,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528738999] [2023-04-01 11:15:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528738999] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:15:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931880398] [2023-04-01 11:15:15,403 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:15:15,403 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:15,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:15,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:15,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:15,425 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:17,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:17,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:17,597 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:20,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3538#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:15:20,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:20,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:15:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 11:15:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284984755] [2023-04-01 11:15:20,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:20,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:15:20,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:15:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:15:20,250 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 11:15:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:20,481 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2023-04-01 11:15:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:15:20,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2023-04-01 11:15:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:20,487 INFO L225 Difference]: With dead ends: 127 [2023-04-01 11:15:20,487 INFO L226 Difference]: Without dead ends: 125 [2023-04-01 11:15:20,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:15:20,502 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:20,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-01 11:15:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-04-01 11:15:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 71 states have internal predecessors, (75), 38 states have call successors, (38), 19 states have call predecessors, (38), 18 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-01 11:15:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-04-01 11:15:20,530 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 70 [2023-04-01 11:15:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:20,530 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-04-01 11:15:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 11:15:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-04-01 11:15:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 11:15:20,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:20,537 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 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] [2023-04-01 11:15:20,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:15:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:20,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:20,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2131269829, now seen corresponding path program 1 times [2023-04-01 11:15:20,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:20,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657845867] [2023-04-01 11:15:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:20,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906604597] [2023-04-01 11:15:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:20,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:20,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:20,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:15:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:20,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:15:20,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-01 11:15:20,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:21,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657845867] [2023-04-01 11:15:21,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906604597] [2023-04-01 11:15:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906604597] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:15:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084332506] [2023-04-01 11:15:21,086 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:15:21,086 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:21,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:21,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:21,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:21,110 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:25,771 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 80#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (< ~counter~0 101) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 82#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (not (= ~counter~0 101)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:25,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:15:25,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 11:15:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434795582] [2023-04-01 11:15:25,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:15:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:15:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:15:25,775 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 11:15:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:25,994 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2023-04-01 11:15:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:15:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2023-04-01 11:15:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:25,995 INFO L225 Difference]: With dead ends: 135 [2023-04-01 11:15:25,995 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 11:15:25,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:15:25,996 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:25,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:15:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 11:15:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-04-01 11:15:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.082191780821918) internal successors, (79), 75 states have internal predecessors, (79), 38 states have call successors, (38), 21 states have call predecessors, (38), 19 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-01 11:15:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2023-04-01 11:15:26,011 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 75 [2023-04-01 11:15:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2023-04-01 11:15:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-04-01 11:15:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2023-04-01 11:15:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 11:15:26,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:26,012 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:26,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:26,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:26,218 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:26,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -794288980, now seen corresponding path program 4 times [2023-04-01 11:15:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810544461] [2023-04-01 11:15:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:26,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:26,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575243368] [2023-04-01 11:15:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:15:26,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:26,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:26,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:15:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:26,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 11:15:26,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-04-01 11:15:26,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-04-01 11:15:26,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810544461] [2023-04-01 11:15:26,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575243368] [2023-04-01 11:15:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575243368] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081500141] [2023-04-01 11:15:26,669 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:15:26,669 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:26,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:26,670 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:26,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:26,690 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:28,757 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:28,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:28,770 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:30,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5180#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:15:30,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:30,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:30,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-01 11:15:30,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39118519] [2023-04-01 11:15:30,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:30,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:15:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:15:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:15:30,128 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2023-04-01 11:15:31,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:15:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:31,976 INFO L93 Difference]: Finished difference Result 147 states and 171 transitions. [2023-04-01 11:15:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:15:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 77 [2023-04-01 11:15:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:32,003 INFO L225 Difference]: With dead ends: 147 [2023-04-01 11:15:32,003 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 11:15:32,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 11:15:32,004 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:32,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 131 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:15:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 11:15:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2023-04-01 11:15:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 states have internal predecessors, (76), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-01 11:15:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2023-04-01 11:15:32,030 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 77 [2023-04-01 11:15:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:32,031 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2023-04-01 11:15:32,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2023-04-01 11:15:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2023-04-01 11:15:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 11:15:32,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:32,032 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:32,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:32,237 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,SelfDestructingSolverStorable10 [2023-04-01 11:15:32,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:32,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1512565092, now seen corresponding path program 5 times [2023-04-01 11:15:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:32,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791259559] [2023-04-01 11:15:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:32,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:32,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503227911] [2023-04-01 11:15:32,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:32,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:32,254 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:32,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:15:32,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:15:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:32,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 11:15:32,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-01 11:15:32,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-04-01 11:15:33,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791259559] [2023-04-01 11:15:33,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503227911] [2023-04-01 11:15:33,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503227911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712934018] [2023-04-01 11:15:33,406 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:15:33,406 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:33,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:33,406 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:33,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:33,426 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:38,174 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 84#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (< ~counter~0 101) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 86#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (not (= ~counter~0 101)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:38,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-04-01 11:15:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832681005] [2023-04-01 11:15:38,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:15:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:15:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:15:38,175 INFO L87 Difference]: Start difference. First operand 125 states and 141 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) [2023-04-01 11:15:41,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:15:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:41,688 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2023-04-01 11:15:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:15:41,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) Word has length 82 [2023-04-01 11:15:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:41,690 INFO L225 Difference]: With dead ends: 137 [2023-04-01 11:15:41,690 INFO L226 Difference]: Without dead ends: 130 [2023-04-01 11:15:41,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:15:41,691 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:41,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 110 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 337 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 11:15:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-01 11:15:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-04-01 11:15:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 11:15:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2023-04-01 11:15:41,711 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 82 [2023-04-01 11:15:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:41,712 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2023-04-01 11:15:41,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 7 states have call predecessors, (27), 9 states have call successors, (27) [2023-04-01 11:15:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2023-04-01 11:15:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 11:15:41,713 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:41,713 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:41,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:41,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:41,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:41,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2010254942, now seen corresponding path program 2 times [2023-04-01 11:15:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:41,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916920759] [2023-04-01 11:15:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:41,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315849196] [2023-04-01 11:15:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:41,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:41,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:15:41,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:15:41,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:41,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 11:15:41,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 76 proven. 25 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-04-01 11:15:42,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-04-01 11:15:43,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916920759] [2023-04-01 11:15:43,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315849196] [2023-04-01 11:15:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315849196] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715790833] [2023-04-01 11:15:43,529 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:15:43,529 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:43,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:43,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:43,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:43,548 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:48,191 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 84#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (< ~counter~0 101) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 86#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= ~counter~0 4)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (not (= ~counter~0 101)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= ~counter~0 8)) (not (= main_~x~0 (+ main_~n~0 11))) (not (= ~counter~0 49)) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (= |old(~counter~0)| 0) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (not (= ~counter~0 main_~n~0)) (not (= ~counter~0 13)) (= (select |#valid| 0) 0) (not (= ~counter~0 14)) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (not (= ~counter~0 7)) (= |#NULL.offset| 0) (not (= (+ main_~n~0 main_~y~0) (+ ~counter~0 main_~x~0))) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= ~counter~0 1)) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:48,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:48,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-01 11:15:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62954760] [2023-04-01 11:15:48,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:15:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:15:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:15:48,193 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-01 11:15:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:49,858 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2023-04-01 11:15:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:15:49,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 98 [2023-04-01 11:15:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:49,860 INFO L225 Difference]: With dead ends: 140 [2023-04-01 11:15:49,860 INFO L226 Difference]: Without dead ends: 136 [2023-04-01 11:15:49,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-04-01 11:15:49,860 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:49,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 11:15:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-01 11:15:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-01 11:15:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.048780487804878) internal successors, (86), 84 states have internal predecessors, (86), 31 states have call successors, (31), 24 states have call predecessors, (31), 22 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 11:15:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2023-04-01 11:15:49,882 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 98 [2023-04-01 11:15:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:49,882 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2023-04-01 11:15:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2023-04-01 11:15:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2023-04-01 11:15:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 11:15:49,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:49,883 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 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] [2023-04-01 11:15:49,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:50,087 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,SelfDestructingSolverStorable12 [2023-04-01 11:15:50,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:50,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 884970994, now seen corresponding path program 2 times [2023-04-01 11:15:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18178476] [2023-04-01 11:15:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:50,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:50,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475253260] [2023-04-01 11:15:50,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:50,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:50,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:50,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:15:50,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:15:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:50,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 11:15:50,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 107 proven. 41 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 11:15:50,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:50,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18178476] [2023-04-01 11:15:50,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475253260] [2023-04-01 11:15:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475253260] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:15:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665894716] [2023-04-01 11:15:50,935 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:15:50,935 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:50,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:50,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:50,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:50,971 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:52,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:52,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:52,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:55,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7967#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:15:55,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:55,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:15:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 11:15:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285938745] [2023-04-01 11:15:55,837 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:15:55,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:15:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 11:15:55,838 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 11:15:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:56,117 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2023-04-01 11:15:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:15:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2023-04-01 11:15:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:56,117 INFO L225 Difference]: With dead ends: 138 [2023-04-01 11:15:56,118 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 11:15:56,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 11:15:56,118 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:56,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:15:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 11:15:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 11:15:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 79 states have internal predecessors, (80), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 11:15:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2023-04-01 11:15:56,148 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 103 [2023-04-01 11:15:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:56,148 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2023-04-01 11:15:56,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 11:15:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2023-04-01 11:15:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 11:15:56,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:56,149 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:56,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 11:15:56,354 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:56,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash -689366782, now seen corresponding path program 2 times [2023-04-01 11:15:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37803041] [2023-04-01 11:15:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:56,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307669950] [2023-04-01 11:15:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:56,367 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:15:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 11:15:56,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-04-01 11:15:56,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:56,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 11:15:56,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-04-01 11:15:56,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-04-01 11:15:56,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37803041] [2023-04-01 11:15:56,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307669950] [2023-04-01 11:15:56,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307669950] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101843763] [2023-04-01 11:15:56,733 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:15:56,733 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:56,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:56,733 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:56,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:56,754 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:15:58,757 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2023-04-01 11:15:58,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:15:58,770 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:00,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9151#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:16:00,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:16:00,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:16:00,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 11:16:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243708036] [2023-04-01 11:16:00,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:16:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:16:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:16:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:16:00,088 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2023-04-01 11:16:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:00,386 INFO L93 Difference]: Finished difference Result 369 states and 401 transitions. [2023-04-01 11:16:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 11:16:00,387 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) Word has length 128 [2023-04-01 11:16:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:00,388 INFO L225 Difference]: With dead ends: 369 [2023-04-01 11:16:00,388 INFO L226 Difference]: Without dead ends: 355 [2023-04-01 11:16:00,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=1349, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 11:16:00,389 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:00,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 147 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:16:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-04-01 11:16:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 288. [2023-04-01 11:16:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.0578034682080926) internal successors, (183), 181 states have internal predecessors, (183), 67 states have call successors, (67), 48 states have call predecessors, (67), 47 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2023-04-01 11:16:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 314 transitions. [2023-04-01 11:16:00,444 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 314 transitions. Word has length 128 [2023-04-01 11:16:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:00,444 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 314 transitions. [2023-04-01 11:16:00,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 12 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (44), 11 states have call predecessors, (44), 10 states have call successors, (44) [2023-04-01 11:16:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 314 transitions. [2023-04-01 11:16:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 11:16:00,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:00,445 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 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] [2023-04-01 11:16:00,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 11:16:00,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:00,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash -810345431, now seen corresponding path program 3 times [2023-04-01 11:16:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:00,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287859586] [2023-04-01 11:16:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:00,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265887061] [2023-04-01 11:16:00,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:16:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:00,658 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:00,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process