/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:16:25,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:16:25,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:16:25,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:16:25,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:16:25,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:16:25,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:16:25,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:16:25,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:16:25,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:16:25,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:16:25,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:16:25,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:16:25,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:16:25,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:16:25,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:16:25,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:16:25,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:16:25,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:16:25,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:16:25,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:16:25,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:16:25,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:16:25,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:16:25,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:16:25,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:16:25,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:16:25,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:16:25,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:16:25,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:16:25,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:16:25,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:16:25,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:16:25,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:16:25,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:16:25,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:16:25,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:16:25,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:16:25,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:16:25,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:16:25,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:16:25,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:16:25,411 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:16:25,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:16:25,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:16:25,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:16:25,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:16:25,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:16:25,412 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:16:25,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:16:25,412 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:16:25,412 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:16:25,413 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:16:25,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:16:25,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:16:25,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:16:25,413 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:16:25,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:16:25,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:16:25,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:16:25,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:16:25,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:25,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:16:25,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:16:25,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:16:25,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:16:25,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:16:25,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:16:25,646 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:16:25,646 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:16:25,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2023-04-01 11:16:26,735 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:16:26,854 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:16:26,855 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2023-04-01 11:16:26,859 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5a55f4c/655dc13fc66647b087f7db11944453e2/FLAG550c31567 [2023-04-01 11:16:26,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da5a55f4c/655dc13fc66647b087f7db11944453e2 [2023-04-01 11:16:26,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:16:26,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:16:26,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:26,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:16:26,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:16:26,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:26" (1/1) ... [2023-04-01 11:16:26,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a92df44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:26, skipping insertion in model container [2023-04-01 11:16:26,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:26" (1/1) ... [2023-04-01 11:16:26,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:16:26,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:16:27,005 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/dijkstra-u_unwindbound10.c[525,538] [2023-04-01 11:16:27,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:27,034 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:16:27,043 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/dijkstra-u_unwindbound10.c[525,538] [2023-04-01 11:16:27,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:27,080 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:16:27,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27 WrapperNode [2023-04-01 11:16:27,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:27,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:16:27,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:16:27,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:16:27,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,101 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:16:27,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:16:27,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:16:27,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:16:27,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (1/1) ... [2023-04-01 11:16:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:27,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:16:27,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:16:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:16:27,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:16:27,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:16:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:16:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:16:27,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:16:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:16:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:16:27,231 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:16:27,233 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:16:27,472 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:16:27,508 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:16:27,508 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:16:27,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:27 BoogieIcfgContainer [2023-04-01 11:16:27,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:16:27,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:16:27,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:16:27,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:16:27,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:16:26" (1/3) ... [2023-04-01 11:16:27,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541d159d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:27, skipping insertion in model container [2023-04-01 11:16:27,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:27" (2/3) ... [2023-04-01 11:16:27,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541d159d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:27, skipping insertion in model container [2023-04-01 11:16:27,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:27" (3/3) ... [2023-04-01 11:16:27,515 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound10.c [2023-04-01 11:16:27,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:16:27,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:16:27,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:16:27,582 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;@4dff421b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:16:27,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:16:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:16:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:16:27,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:27,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:27,591 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:27,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1529025729, now seen corresponding path program 1 times [2023-04-01 11:16:27,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:27,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605850555] [2023-04-01 11:16:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:27,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605850555] [2023-04-01 11:16:27,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:16:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082709505] [2023-04-01 11:16:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:27,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:27,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:16:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:27,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:16:27,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:27,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:27,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082709505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:27,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:27,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:16:27,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003146743] [2023-04-01 11:16:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:27,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:16:27,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:16:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:16:27,859 INFO L87 Difference]: Start difference. First operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:27,915 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-04-01 11:16:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:16:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:16:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:27,921 INFO L225 Difference]: With dead ends: 56 [2023-04-01 11:16:27,921 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:16:27,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:16:27,927 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:27,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:16:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 11:16:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:16:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-04-01 11:16:27,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 15 [2023-04-01 11:16:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:27,981 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-04-01 11:16:27,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-04-01 11:16:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:16:27,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:27,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:27,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 11:16:28,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:28,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:28,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1095400856, now seen corresponding path program 1 times [2023-04-01 11:16:28,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888944679] [2023-04-01 11:16:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:28,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192737895] [2023-04-01 11:16:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:28,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:28,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:28,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:16:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:28,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:16:28,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:28,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:28,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888944679] [2023-04-01 11:16:28,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192737895] [2023-04-01 11:16:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192737895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:28,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:28,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:16:28,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264993078] [2023-04-01 11:16:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:16:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:16:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:16:28,283 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:28,299 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2023-04-01 11:16:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:16:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 11:16:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:28,300 INFO L225 Difference]: With dead ends: 50 [2023-04-01 11:16:28,300 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:16:28,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:16:28,301 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:28,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:16:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:16:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:16:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-01 11:16:28,307 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2023-04-01 11:16:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:28,307 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-01 11:16:28,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-01 11:16:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:16:28,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:28,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:28,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:16:28,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 11:16:28,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:28,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:28,514 INFO L85 PathProgramCache]: Analyzing trace with hash 56656903, now seen corresponding path program 1 times [2023-04-01 11:16:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086795580] [2023-04-01 11:16:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:28,525 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:28,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283092093] [2023-04-01 11:16:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:28,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:28,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:28,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:16:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:28,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:28,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:28,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:28,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086795580] [2023-04-01 11:16:28,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283092093] [2023-04-01 11:16:28,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283092093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:28,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:16:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102824154] [2023-04-01 11:16:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:16:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:16:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:16:28,600 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:28,622 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-04-01 11:16:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:16:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 11:16:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:28,623 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:16:28,624 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 11:16:28,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:16:28,624 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:28,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 11:16:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-04-01 11:16:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:16:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-04-01 11:16:28,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 18 [2023-04-01 11:16:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:28,630 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-04-01 11:16:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-04-01 11:16:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:16:28,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:28,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:28,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:28,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:28,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:28,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash 58146453, now seen corresponding path program 1 times [2023-04-01 11:16:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:28,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917121904] [2023-04-01 11:16:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:29,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:29,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917121904] [2023-04-01 11:16:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917121904] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:29,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:16:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458386881] [2023-04-01 11:16:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:16:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:16:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:16:29,171 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:31,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:33,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:35,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:35,438 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-04-01 11:16:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:16:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 11:16:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:35,439 INFO L225 Difference]: With dead ends: 67 [2023-04-01 11:16:35,439 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 11:16:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:16:35,440 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 103 Invalid, 4 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 11:16:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 11:16:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 11:16:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-04-01 11:16:35,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 18 [2023-04-01 11:16:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:35,450 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-04-01 11:16:35,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-04-01 11:16:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:16:35,451 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:35,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:35,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:16:35,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:35,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 45867820, now seen corresponding path program 1 times [2023-04-01 11:16:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595025457] [2023-04-01 11:16:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:35,458 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:35,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341228859] [2023-04-01 11:16:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:35,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:16:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:35,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:35,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:35,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:35,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595025457] [2023-04-01 11:16:35,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341228859] [2023-04-01 11:16:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341228859] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927298153] [2023-04-01 11:16:35,584 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:35,584 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:35,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:35,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:35,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:35,661 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:36,103 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 55 for LOIs [2023-04-01 11:16:36,112 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:36,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:36,125 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1927298153] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:37,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:16:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-01 11:16:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334759181] [2023-04-01 11:16:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:16:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:16:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-04-01 11:16:37,064 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:39,979 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2023-04-01 11:16:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:16:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 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 20 [2023-04-01 11:16:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:39,981 INFO L225 Difference]: With dead ends: 68 [2023-04-01 11:16:39,981 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 11:16:39,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:16:39,982 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:39,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 58 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 11:16:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 11:16:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-04-01 11:16:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-04-01 11:16:40,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2023-04-01 11:16:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:40,015 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-04-01 11:16:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-04-01 11:16:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:16:40,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:40,031 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:40,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:16:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:40,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:40,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 47357370, now seen corresponding path program 1 times [2023-04-01 11:16:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462530392] [2023-04-01 11:16:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:40,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462530392] [2023-04-01 11:16:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462530392] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412769868] [2023-04-01 11:16:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:40,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:40,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:40,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:40,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:16:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:40,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:40,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412769868] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:40,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308320291] [2023-04-01 11:16:40,462 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:40,462 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:40,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:40,462 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:40,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:40,528 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:40,786 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 11:16:40,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:40,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:40,813 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:41,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1238#(and (= (select |#length| 3) 12) (< ~counter~0 11) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:16:41,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:16:41,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:16:41,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-04-01 11:16:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989612001] [2023-04-01 11:16:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:16:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:16:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:16:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:16:41,943 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 11:16:49,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:49,247 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2023-04-01 11:16:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:16:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 20 [2023-04-01 11:16:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:49,248 INFO L225 Difference]: With dead ends: 103 [2023-04-01 11:16:49,248 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 11:16:49,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:16:49,251 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:49,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 174 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 11:16:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 11:16:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2023-04-01 11:16:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-04-01 11:16:49,267 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 20 [2023-04-01 11:16:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:49,267 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-04-01 11:16:49,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 11:16:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-04-01 11:16:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:16:49,268 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:49,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:49,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:16:49,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:49,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:49,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1077737041, now seen corresponding path program 1 times [2023-04-01 11:16:49,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:49,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244645059] [2023-04-01 11:16:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:49,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:49,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244645059] [2023-04-01 11:16:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244645059] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784646789] [2023-04-01 11:16:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:49,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:49,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:16:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:49,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 11:16:49,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:49,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784646789] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128049482] [2023-04-01 11:16:49,907 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:49,907 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:49,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:49,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:49,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:49,967 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:50,254 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 11:16:50,262 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:50,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:50,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:51,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [128049482] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:51,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:16:51,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 7, 7] total 28 [2023-04-01 11:16:51,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854139] [2023-04-01 11:16:51,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:51,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:16:51,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:16:51,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:16:51,324 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:54,289 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2023-04-01 11:16:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:16:54,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 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 21 [2023-04-01 11:16:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:54,291 INFO L225 Difference]: With dead ends: 89 [2023-04-01 11:16:54,291 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 11:16:54,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:16:54,293 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:54,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 11:16:54,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 11:16:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2023-04-01 11:16:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2023-04-01 11:16:54,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 21 [2023-04-01 11:16:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:54,303 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2023-04-01 11:16:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2023-04-01 11:16:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 11:16:54,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:54,303 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:54,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:16:54,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:54,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash 409817078, now seen corresponding path program 2 times [2023-04-01 11:16:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:54,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225925349] [2023-04-01 11:16:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:54,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:54,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225925349] [2023-04-01 11:16:54,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225925349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:54,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446139076] [2023-04-01 11:16:54,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:16:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:54,649 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:54,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:16:54,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-01 11:16:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:16:54,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:16:54,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:16:54,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446139076] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:54,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:16:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 11:16:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708577409] [2023-04-01 11:16:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:54,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:16:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:16:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:16:54,715 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:54,750 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2023-04-01 11:16:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:16:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-04-01 11:16:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:54,753 INFO L225 Difference]: With dead ends: 74 [2023-04-01 11:16:54,753 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:16:54,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:16:54,754 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:54,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:16:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-04-01 11:16:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2023-04-01 11:16:54,785 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 29 [2023-04-01 11:16:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:54,786 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2023-04-01 11:16:54,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2023-04-01 11:16:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 11:16:54,790 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:54,790 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:54,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:54,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,995 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:54,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2008937068, now seen corresponding path program 1 times [2023-04-01 11:16:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661148241] [2023-04-01 11:16:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:55,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:55,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702557451] [2023-04-01 11:16:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:55,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:55,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:55,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:16:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:55,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 11:16:55,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:16:55,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:16:55,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661148241] [2023-04-01 11:16:55,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:55,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702557451] [2023-04-01 11:16:55,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702557451] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:55,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92869483] [2023-04-01 11:16:55,208 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 11:16:55,208 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:55,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:55,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:55,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:55,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:17:02,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:17:02,075 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:17:02,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:17:02,084 INFO L180 IcfgInterpreter]: Interpretation finished