/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:11:13,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:11:13,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:11:13,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:11:13,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:11:13,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:11:13,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:11:13,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:11:13,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:11:13,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:11:13,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:11:13,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:11:13,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:11:13,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:11:13,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:11:13,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:11:13,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:11:13,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:11:13,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:11:13,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:11:13,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:11:13,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:11:13,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:11:13,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:11:13,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:11:13,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:11:13,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:11:13,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:11:13,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:11:13,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:11:13,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:11:13,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:11:13,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:11:13,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:11:13,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:11:13,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:11:13,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:11:13,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:11:13,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:11:13,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:11:13,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:11:13,218 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 05:11:13,231 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:11:13,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:11:13,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:11:13,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:11:13,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:11:13,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:11:13,232 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:11:13,232 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:11:13,232 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:11:13,232 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:11:13,232 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:11:13,233 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:11:13,233 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:11:13,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:11:13,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:11:13,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:13,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:11:13,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:11:13,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:11:13,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:11:13,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:11:13,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:11:13,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:11:13,383 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:11:13,400 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:11:13,402 INFO L432 ainManager$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 05:11:14,627 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:11:14,817 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:11:14,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-04-01 05:11:14,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2145976/00f608c7a3c0488d83c39a9bbef01f86/FLAG36638b80a [2023-04-01 05:11:14,836 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d2145976/00f608c7a3c0488d83c39a9bbef01f86 [2023-04-01 05:11:14,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:11:14,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:11:14,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:14,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:11:14,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:11:14,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:14,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258f9f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14, skipping insertion in model container [2023-04-01 05:11:14,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:14,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:11:14,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:11:14,956 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 05:11:14,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:14,975 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:11:14,983 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 05:11:14,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:11:14,997 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:11:14,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14 WrapperNode [2023-04-01 05:11:14,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:11:14,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:11:14,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:11:14,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:11:15,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:11:15,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:11:15,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:11:15,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:11:15,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (1/1) ... [2023-04-01 05:11:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:11:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:15,049 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 05:11:15,061 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 05:11:15,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:11:15,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:11:15,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:11:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:11:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:11:15,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:11:15,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:11:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:11:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:11:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:11:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:11:15,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:11:15,148 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:11:15,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:11:15,342 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:11:15,356 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:11:15,356 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:11:15,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:15 BoogieIcfgContainer [2023-04-01 05:11:15,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:11:15,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:11:15,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:11:15,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:11:15,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:11:14" (1/3) ... [2023-04-01 05:11:15,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa3d2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:15, skipping insertion in model container [2023-04-01 05:11:15,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:11:14" (2/3) ... [2023-04-01 05:11:15,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa3d2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:11:15, skipping insertion in model container [2023-04-01 05:11:15,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:11:15" (3/3) ... [2023-04-01 05:11:15,363 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2023-04-01 05:11:15,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:11:15,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:11:15,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:11:15,408 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;@5eb675cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:11:15,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:11:15,410 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 05:11:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 05:11:15,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:15,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:15,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:15,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1647932821, now seen corresponding path program 1 times [2023-04-01 05:11:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:15,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72793012] [2023-04-01 05:11:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:15,524 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 05:11:15,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72793012] [2023-04-01 05:11:15,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72793012] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:15,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:15,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:11:15,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829044146] [2023-04-01 05:11:15,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:11:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:11:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:11:15,548 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 05:11:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:15,568 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2023-04-01 05:11:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:11:15,570 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 05:11:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:15,574 INFO L225 Difference]: With dead ends: 53 [2023-04-01 05:11:15,574 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 05:11:15,577 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 05:11:15,579 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 05:11:15,579 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 05:11:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 05:11:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 05:11:15,602 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 05:11:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2023-04-01 05:11:15,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 10 [2023-04-01 05:11:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:15,604 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2023-04-01 05:11:15,604 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 05:11:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2023-04-01 05:11:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:11:15,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:15,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:11:15,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:15,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash -78558798, now seen corresponding path program 1 times [2023-04-01 05:11:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728352385] [2023-04-01 05:11:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:15,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:15,706 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 05:11:15,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:15,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728352385] [2023-04-01 05:11:15,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728352385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:15,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:11:15,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470700955] [2023-04-01 05:11:15,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:15,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:11:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:11:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:11:15,709 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 05:11:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:15,724 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2023-04-01 05:11:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:11:15,725 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 05:11:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:15,726 INFO L225 Difference]: With dead ends: 39 [2023-04-01 05:11:15,726 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 05:11:15,726 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 05:11:15,727 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 05:11:15,727 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 05:11:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 05:11:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 05:11:15,732 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 05:11:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2023-04-01 05:11:15,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 11 [2023-04-01 05:11:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:15,737 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2023-04-01 05:11:15,737 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 05:11:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2023-04-01 05:11:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:11:15,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:15,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:15,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 05:11:15,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:15,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:15,739 INFO L85 PathProgramCache]: Analyzing trace with hash -77009666, now seen corresponding path program 1 times [2023-04-01 05:11:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:15,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496929322] [2023-04-01 05:11:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:15,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:15,846 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 05:11:15,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496929322] [2023-04-01 05:11:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496929322] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:15,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:11:15,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:11:15,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330498220] [2023-04-01 05:11:15,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:15,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:11:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:11:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:11:15,848 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 05:11:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:15,901 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 05:11:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:11:15,902 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 05:11:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:15,902 INFO L225 Difference]: With dead ends: 33 [2023-04-01 05:11:15,902 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 05:11:15,903 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 05:11:15,904 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 05:11:15,904 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 05:11:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 05:11:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 05:11:15,912 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 05:11:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-04-01 05:11:15,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2023-04-01 05:11:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:15,913 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-04-01 05:11:15,913 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 05:11:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-04-01 05:11:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 05:11:15,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:15,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:11:15,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:11:15,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:15,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1662799058, now seen corresponding path program 1 times [2023-04-01 05:11:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:15,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080365440] [2023-04-01 05:11:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:15,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:15,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527968601] [2023-04-01 05:11:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:15,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:15,957 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 05:11:15,958 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 05:11:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:15,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:11:16,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:16,067 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 05:11:16,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:16,152 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 05:11:16,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080365440] [2023-04-01 05:11:16,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527968601] [2023-04-01 05:11:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527968601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283606007] [2023-04-01 05:11:16,166 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 05:11:16,166 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:16,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:16,171 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:16,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:16,213 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:16,347 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-01 05:11:16,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:16,357 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1283606007] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:11:16,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:16,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-01 05:11:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425215636] [2023-04-01 05:11:16,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:11:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:11:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:11:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:16,635 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 05:11:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:16,999 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2023-04-01 05:11:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:11:17,000 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 05:11:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:17,000 INFO L225 Difference]: With dead ends: 53 [2023-04-01 05:11:17,000 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 05:11:17,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:17,002 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:11:17,002 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 05:11:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 05:11:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 05:11:17,010 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 05:11:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-04-01 05:11:17,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 16 [2023-04-01 05:11:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:17,011 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-04-01 05:11:17,011 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 05:11:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-04-01 05:11:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 05:11:17,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:17,012 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 05:11:17,020 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 05:11:17,217 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 05:11:17,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:17,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1441032967, now seen corresponding path program 1 times [2023-04-01 05:11:17,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:17,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17620204] [2023-04-01 05:11:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:17,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155337093] [2023-04-01 05:11:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:17,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:17,244 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 05:11:17,247 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 05:11:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:17,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:11:17,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:17,356 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 05:11:17,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:17,397 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 05:11:17,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:17,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17620204] [2023-04-01 05:11:17,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:17,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155337093] [2023-04-01 05:11:17,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155337093] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:17,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835342631] [2023-04-01 05:11:17,399 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:17,399 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:17,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:17,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:17,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:17,418 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:18,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:18,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:18,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:19,117 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '929#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:19,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:19,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 05:11:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705224208] [2023-04-01 05:11:19,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:19,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:11:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:11:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:11:19,119 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 05:11:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:19,235 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2023-04-01 05:11:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:11:19,235 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 05:11:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:19,236 INFO L225 Difference]: With dead ends: 111 [2023-04-01 05:11:19,237 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 05:11:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:11:19,238 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 05:11:19,238 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 05:11:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 05:11:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-04-01 05:11:19,249 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 05:11:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2023-04-01 05:11:19,250 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 44 [2023-04-01 05:11:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:19,251 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2023-04-01 05:11:19,251 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 05:11:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2023-04-01 05:11:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 05:11:19,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:19,252 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 05:11:19,267 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 05:11:19,456 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 05:11:19,457 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:19,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1933148283, now seen corresponding path program 1 times [2023-04-01 05:11:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:19,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048613608] [2023-04-01 05:11:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:19,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244368795] [2023-04-01 05:11:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:19,485 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 05:11:19,486 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 05:11:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:19,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 05:11:19,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:19,626 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 05:11:19,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:19,787 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 05:11:19,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048613608] [2023-04-01 05:11:19,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244368795] [2023-04-01 05:11:19,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244368795] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064863817] [2023-04-01 05:11:19,789 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:19,789 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:19,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:19,790 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:19,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:19,832 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:20,682 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:20,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:20,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:21,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1542#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:21,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:21,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:21,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 05:11:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030825532] [2023-04-01 05:11:21,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:11:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:11:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:11:21,156 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 05:11:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:21,491 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-04-01 05:11:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:21,491 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 05:11:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:21,492 INFO L225 Difference]: With dead ends: 109 [2023-04-01 05:11:21,492 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 05:11:21,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:21,493 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:21,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:11:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 05:11:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 05:11:21,529 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 05:11:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2023-04-01 05:11:21,533 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 44 [2023-04-01 05:11:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:21,534 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2023-04-01 05:11:21,535 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 05:11:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2023-04-01 05:11:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 05:11:21,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:21,541 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 05:11:21,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 05:11:21,751 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 05:11:21,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:21,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash -82151627, now seen corresponding path program 2 times [2023-04-01 05:11:21,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:21,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035865437] [2023-04-01 05:11:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:21,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:21,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:21,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281115053] [2023-04-01 05:11:21,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:21,769 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 05:11:21,773 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 05:11:21,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:11:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:21,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 05:11:21,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:21,888 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 05:11:21,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:21,945 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 05:11:21,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035865437] [2023-04-01 05:11:21,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281115053] [2023-04-01 05:11:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281115053] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961576569] [2023-04-01 05:11:21,946 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:21,947 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:21,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:21,947 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:21,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:21,962 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:22,813 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:22,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:22,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:23,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2197#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:23,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:23,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:23,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 05:11:23,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49484836] [2023-04-01 05:11:23,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:23,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:11:23,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:11:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:23,217 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 05:11:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:23,426 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2023-04-01 05:11:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:11:23,426 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 05:11:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:23,427 INFO L225 Difference]: With dead ends: 121 [2023-04-01 05:11:23,427 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 05:11:23,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:11:23,428 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:23,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 05:11:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-04-01 05:11:23,470 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 05:11:23,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2023-04-01 05:11:23,472 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 49 [2023-04-01 05:11:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:23,472 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2023-04-01 05:11:23,473 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 05:11:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2023-04-01 05:11:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 05:11:23,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:23,477 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 05:11:23,483 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 05:11:23,677 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 05:11:23,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:23,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1692777595, now seen corresponding path program 3 times [2023-04-01 05:11:23,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:23,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898648200] [2023-04-01 05:11:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:23,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:23,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601758354] [2023-04-01 05:11:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:11:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:23,696 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 05:11:23,697 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 05:11:23,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:11:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:23,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 05:11:23,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:23,871 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 05:11:23,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:24,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:24,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898648200] [2023-04-01 05:11:24,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:24,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601758354] [2023-04-01 05:11:24,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601758354] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:24,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945323615] [2023-04-01 05:11:24,196 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:24,196 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:24,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:24,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:24,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:24,218 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:25,213 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:11:25,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:25,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:25,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2814#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:25,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:25,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-04-01 05:11:25,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336081713] [2023-04-01 05:11:25,534 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:25,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:11:25,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:25,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:11:25,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-04-01 05:11:25,535 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 05:11:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:25,692 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2023-04-01 05:11:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:11:25,694 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 05:11:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:25,695 INFO L225 Difference]: With dead ends: 125 [2023-04-01 05:11:25,695 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 05:11:25,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 05:11:25,696 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:25,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 79 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:11:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 05:11:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-04-01 05:11:25,718 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 05:11:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-04-01 05:11:25,719 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 54 [2023-04-01 05:11:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:25,720 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-04-01 05:11:25,720 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 05:11:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-04-01 05:11:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 05:11:25,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:25,722 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 05:11:25,738 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 05:11:25,928 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 05:11:25,929 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:25,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1446194315, now seen corresponding path program 1 times [2023-04-01 05:11:25,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:25,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405359301] [2023-04-01 05:11:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:25,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:25,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697171443] [2023-04-01 05:11:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:25,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:25,957 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 05:11:25,989 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 05:11:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:26,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 05:11:26,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:26,183 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 05:11:26,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:26,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405359301] [2023-04-01 05:11:26,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697171443] [2023-04-01 05:11:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697171443] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992703613] [2023-04-01 05:11:26,369 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:26,369 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:26,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:26,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:26,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:26,385 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:27,240 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:27,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:27,246 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:27,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3536#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:27,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:27,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:11:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738352928] [2023-04-01 05:11:27,779 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:27,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:11:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:11:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:11:27,781 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 05:11:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:27,974 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2023-04-01 05:11:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:27,974 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 05:11:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:27,975 INFO L225 Difference]: With dead ends: 127 [2023-04-01 05:11:27,975 INFO L226 Difference]: Without dead ends: 125 [2023-04-01 05:11:27,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:27,976 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 05:11:27,976 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 05:11:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-01 05:11:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-04-01 05:11:28,023 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 05:11:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-04-01 05:11:28,025 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 70 [2023-04-01 05:11:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:28,025 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-04-01 05:11:28,025 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 05:11:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-04-01 05:11:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 05:11:28,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:28,027 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 05:11:28,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:11:28,233 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 05:11:28,233 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:28,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2131269829, now seen corresponding path program 1 times [2023-04-01 05:11:28,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:28,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668732319] [2023-04-01 05:11:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:28,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101141014] [2023-04-01 05:11:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:28,256 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 05:11:28,257 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 05:11:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:28,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 05:11:28,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:28,488 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 05:11:28,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:28,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668732319] [2023-04-01 05:11:28,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101141014] [2023-04-01 05:11:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101141014] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815516980] [2023-04-01 05:11:28,683 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:28,683 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:28,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:28,683 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:28,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:28,700 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:29,501 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:11:29,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:29,506 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:30,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4298#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:30,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:30,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:11:30,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243176893] [2023-04-01 05:11:30,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:30,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:11:30,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:30,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:11:30,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:11:30,027 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 05:11:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:30,248 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2023-04-01 05:11:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:11:30,250 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 05:11:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:30,251 INFO L225 Difference]: With dead ends: 135 [2023-04-01 05:11:30,251 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 05:11:30,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:11:30,252 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:30,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 05:11:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-04-01 05:11:30,265 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 05:11:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2023-04-01 05:11:30,266 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 75 [2023-04-01 05:11:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:30,266 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2023-04-01 05:11:30,267 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 05:11:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2023-04-01 05:11:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 05:11:30,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:30,267 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 05:11:30,278 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 05:11:30,473 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 05:11:30,473 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:30,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash -794288980, now seen corresponding path program 4 times [2023-04-01 05:11:30,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:30,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746653205] [2023-04-01 05:11:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:30,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:30,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:30,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021829611] [2023-04-01 05:11:30,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:11:30,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:30,490 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 05:11:30,491 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 05:11:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:11:30,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 05:11:30,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:30,722 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 05:11:30,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:30,967 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 05:11:30,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:30,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746653205] [2023-04-01 05:11:30,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:30,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021829611] [2023-04-01 05:11:30,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021829611] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:30,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179496985] [2023-04-01 05:11:30,968 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:30,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:30,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:30,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:30,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:30,992 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:31,657 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:31,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:31,665 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:32,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5186#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:32,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:32,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-01 05:11:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412044049] [2023-04-01 05:11:32,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:32,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:11:32,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:11:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:32,084 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 05:11:34,658 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 05:11:35,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:11:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:36,055 INFO L93 Difference]: Finished difference Result 164 states and 203 transitions. [2023-04-01 05:11:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:11:36,056 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 05:11:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:36,058 INFO L225 Difference]: With dead ends: 164 [2023-04-01 05:11:36,058 INFO L226 Difference]: Without dead ends: 148 [2023-04-01 05:11:36,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 05:11:36,059 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:36,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 564 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 05:11:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-04-01 05:11:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2023-04-01 05:11:36,089 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 05:11:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 141 transitions. [2023-04-01 05:11:36,090 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 141 transitions. Word has length 77 [2023-04-01 05:11:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:36,091 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 141 transitions. [2023-04-01 05:11:36,091 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 05:11:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 141 transitions. [2023-04-01 05:11:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-01 05:11:36,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:36,092 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 05:11:36,106 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 05:11:36,297 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 05:11:36,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:36,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1512565092, now seen corresponding path program 5 times [2023-04-01 05:11:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:36,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434311615] [2023-04-01 05:11:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:36,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570851692] [2023-04-01 05:11:36,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:36,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:36,309 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 05:11:36,372 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 05:11:36,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:36,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:36,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 05:11:36,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:36,644 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 05:11:36,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:37,107 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 05:11:37,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434311615] [2023-04-01 05:11:37,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570851692] [2023-04-01 05:11:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570851692] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:37,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35824438] [2023-04-01 05:11:37,111 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 05:11:37,111 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:37,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:37,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:37,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:37,126 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:37,827 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:37,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:37,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:38,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6158#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:38,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:38,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-04-01 05:11:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362529808] [2023-04-01 05:11:38,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:38,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:11:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:11:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:11:38,523 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 05:11:41,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:11:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:42,528 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2023-04-01 05:11:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:11:42,528 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 05:11:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:42,529 INFO L225 Difference]: With dead ends: 137 [2023-04-01 05:11:42,529 INFO L226 Difference]: Without dead ends: 130 [2023-04-01 05:11:42,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 213 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:11:42,530 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 64 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:42,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 373 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 05:11:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-01 05:11:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-04-01 05:11:42,555 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 05:11:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2023-04-01 05:11:42,557 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 82 [2023-04-01 05:11:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:42,557 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2023-04-01 05:11:42,558 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 05:11:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2023-04-01 05:11:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 05:11:42,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:42,562 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 05:11:42,569 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 05:11:42,769 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 05:11:42,770 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:42,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2010254942, now seen corresponding path program 2 times [2023-04-01 05:11:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:42,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177610371] [2023-04-01 05:11:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:42,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:42,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118609010] [2023-04-01 05:11:42,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:42,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:42,809 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 05:11:42,810 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 05:11:42,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:42,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 05:11:42,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:43,095 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 05:11:43,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:44,249 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 05:11:44,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177610371] [2023-04-01 05:11:44,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118609010] [2023-04-01 05:11:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118609010] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58932012] [2023-04-01 05:11:44,251 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:44,251 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:44,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:44,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:44,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:44,263 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:45,012 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:45,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:45,018 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:45,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7164#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:45,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:45,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:45,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-04-01 05:11:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149500672] [2023-04-01 05:11:45,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:11:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:11:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:45,938 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 05:11:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:47,443 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2023-04-01 05:11:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 05:11:47,444 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 05:11:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:47,444 INFO L225 Difference]: With dead ends: 140 [2023-04-01 05:11:47,445 INFO L226 Difference]: Without dead ends: 136 [2023-04-01 05:11:47,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 259 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:11:47,445 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:47,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 117 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 05:11:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-01 05:11:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-01 05:11:47,485 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 05:11:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2023-04-01 05:11:47,485 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 98 [2023-04-01 05:11:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:47,486 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2023-04-01 05:11:47,486 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 05:11:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2023-04-01 05:11:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-01 05:11:47,486 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:47,486 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 05:11:47,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-01 05:11:47,687 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 05:11:47,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:47,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash 884970994, now seen corresponding path program 2 times [2023-04-01 05:11:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:47,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355499196] [2023-04-01 05:11:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:47,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097443762] [2023-04-01 05:11:47,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:47,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:47,725 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 05:11:47,726 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 05:11:47,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:11:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:47,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 05:11:47,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:47,992 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 05:11:47,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:48,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:48,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355499196] [2023-04-01 05:11:48,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:48,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097443762] [2023-04-01 05:11:48,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097443762] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:48,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402479108] [2023-04-01 05:11:48,710 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:48,710 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:48,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:48,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:48,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:48,723 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:49,485 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:49,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:49,491 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:50,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8034#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:50,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:50,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 05:11:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127896069] [2023-04-01 05:11:50,084 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:50,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:11:50,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:11:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:11:50,085 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 05:11:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:50,319 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2023-04-01 05:11:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:11:50,320 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 05:11:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:50,321 INFO L225 Difference]: With dead ends: 138 [2023-04-01 05:11:50,322 INFO L226 Difference]: Without dead ends: 127 [2023-04-01 05:11:50,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 213 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 05:11:50,323 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:50,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 124 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-04-01 05:11:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-04-01 05:11:50,346 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 05:11:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2023-04-01 05:11:50,346 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 103 [2023-04-01 05:11:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:50,347 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2023-04-01 05:11:50,347 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 05:11:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2023-04-01 05:11:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 05:11:50,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:50,348 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 05:11:50,352 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 05:11:50,552 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 05:11:50,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:50,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:50,553 INFO L85 PathProgramCache]: Analyzing trace with hash -689366782, now seen corresponding path program 2 times [2023-04-01 05:11:50,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525919640] [2023-04-01 05:11:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:50,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332302156] [2023-04-01 05:11:50,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:11:50,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:50,571 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 05:11:50,581 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 05:11:50,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-04-01 05:11:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:50,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 05:11:50,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:50,838 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 05:11:50,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:50,949 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 05:11:50,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525919640] [2023-04-01 05:11:50,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332302156] [2023-04-01 05:11:50,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332302156] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:11:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1195101087] [2023-04-01 05:11:50,952 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 05:11:50,952 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:50,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:50,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:50,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:50,964 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:51,605 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2023-04-01 05:11:51,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:51,621 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:52,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9212#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:52,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:52,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:11:52,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 05:11:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509455515] [2023-04-01 05:11:52,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:52,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 05:11:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 05:11:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:11:52,053 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 05:11:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:11:52,423 INFO L93 Difference]: Finished difference Result 369 states and 401 transitions. [2023-04-01 05:11:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 05:11:52,423 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 05:11:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:11:52,424 INFO L225 Difference]: With dead ends: 369 [2023-04-01 05:11:52,425 INFO L226 Difference]: Without dead ends: 355 [2023-04-01 05:11:52,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 350 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 05:11:52,426 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:11:52,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 144 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:11:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-04-01 05:11:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 288. [2023-04-01 05:11:52,482 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 05:11:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 314 transitions. [2023-04-01 05:11:52,483 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 314 transitions. Word has length 128 [2023-04-01 05:11:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:11:52,483 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 314 transitions. [2023-04-01 05:11:52,483 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 05:11:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 314 transitions. [2023-04-01 05:11:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-01 05:11:52,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:11:52,484 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 05:11:52,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 05:11:52,692 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 05:11:52,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:11:52,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:11:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash -810345431, now seen corresponding path program 3 times [2023-04-01 05:11:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:11:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468377268] [2023-04-01 05:11:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:11:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:11:52,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:11:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13197171] [2023-04-01 05:11:52,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:11:52,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:11:52,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:11:52,706 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 05:11:52,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 05:11:55,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:11:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:11:55,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:11:55,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:11:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 143 proven. 188 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 05:11:55,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:11:56,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:11:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468377268] [2023-04-01 05:11:56,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:11:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13197171] [2023-04-01 05:11:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13197171] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:11:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597529644] [2023-04-01 05:11:56,454 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:11:56,454 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:11:56,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:11:56,454 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:11:56,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:11:56,466 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:11:57,661 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:11:57,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:11:57,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:11:58,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10721#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:11:58,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:11:58,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:11:58,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 05:11:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635045464] [2023-04-01 05:11:58,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:11:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:11:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:11:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:11:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:11:58,702 INFO L87 Difference]: Start difference. First operand 288 states and 314 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:12:01,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:03,866 WARN L539 Checker$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 05:12:05,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:12:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:12:08,095 INFO L93 Difference]: Finished difference Result 300 states and 326 transitions. [2023-04-01 05:12:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:12:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2023-04-01 05:12:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:12:08,097 INFO L225 Difference]: With dead ends: 300 [2023-04-01 05:12:08,097 INFO L226 Difference]: Without dead ends: 296 [2023-04-01 05:12:08,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 266 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:12:08,099 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:12:08,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 192 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2023-04-01 05:12:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-04-01 05:12:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2023-04-01 05:12:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 178 states have (on average 1.050561797752809) internal successors, (187), 185 states have internal predecessors, (187), 68 states have call successors, (68), 50 states have call predecessors, (68), 48 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2023-04-01 05:12:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 320 transitions. [2023-04-01 05:12:08,207 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 320 transitions. Word has length 131 [2023-04-01 05:12:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:12:08,207 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 320 transitions. [2023-04-01 05:12:08,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 05:12:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 320 transitions. [2023-04-01 05:12:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 05:12:08,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:12:08,209 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 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, 1, 1] [2023-04-01 05:12:08,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 05:12:08,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 05:12:08,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:12:08,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:12:08,431 INFO L85 PathProgramCache]: Analyzing trace with hash 721651399, now seen corresponding path program 1 times [2023-04-01 05:12:08,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:12:08,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425800331] [2023-04-01 05:12:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:08,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:12:08,444 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:12:08,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698250996] [2023-04-01 05:12:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:12:08,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:12:08,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:12:08,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:12:08,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 05:12:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:12:08,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 05:12:08,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:12:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-04-01 05:12:09,017 INFO L327 TraceCheckSpWp]: Computing backward predicates...