./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 18:20:24,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 18:20:24,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 18:20:24,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 18:20:24,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 18:20:24,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 18:20:24,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 18:20:24,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 18:20:24,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 18:20:24,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 18:20:24,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 18:20:24,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 18:20:24,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 18:20:24,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 18:20:24,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 18:20:24,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 18:20:24,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 18:20:24,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 18:20:24,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 18:20:24,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 18:20:24,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 18:20:24,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 18:20:24,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 18:20:24,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 18:20:24,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 18:20:24,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 18:20:24,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 18:20:24,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 18:20:24,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 18:20:24,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 18:20:24,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 18:20:24,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 18:20:24,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 18:20:24,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 18:20:24,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 18:20:24,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 18:20:24,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 18:20:24,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 18:20:24,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 18:20:24,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 18:20:24,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 18:20:24,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 18:20:24,168 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 18:20:24,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 18:20:24,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 18:20:24,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 18:20:24,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 18:20:24,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 18:20:24,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 18:20:24,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 18:20:24,171 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 18:20:24,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 18:20:24,172 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 18:20:24,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 18:20:24,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 18:20:24,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 18:20:24,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 18:20:24,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 18:20:24,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 18:20:24,174 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 18:20:24,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 18:20:24,174 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 18:20:24,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 18:20:24,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 18:20:24,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 18:20:24,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 18:20:24,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:20:24,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 18:20:24,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 18:20:24,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 18:20:24,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 18:20:24,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 18:20:24,176 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 18:20:24,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 18:20:24,177 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 18:20:24,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 18:20:24,177 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 18:20:24,177 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2023-02-18 18:20:24,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 18:20:24,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 18:20:24,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 18:20:24,406 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 18:20:24,407 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 18:20:24,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2023-02-18 18:20:25,478 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 18:20:25,687 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 18:20:25,687 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2023-02-18 18:20:25,692 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb96902d3/00a58d95b7174b9b83e8b39663c78e3e/FLAG2491c0f8c [2023-02-18 18:20:25,701 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb96902d3/00a58d95b7174b9b83e8b39663c78e3e [2023-02-18 18:20:25,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 18:20:25,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 18:20:25,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 18:20:25,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 18:20:25,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 18:20:25,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73487c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25, skipping insertion in model container [2023-02-18 18:20:25,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 18:20:25,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 18:20:25,842 WARN L237 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/hard2_unwindbound20.c[526,539] [2023-02-18 18:20:25,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:20:25,861 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 18:20:25,872 WARN L237 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/hard2_unwindbound20.c[526,539] [2023-02-18 18:20:25,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:20:25,888 INFO L208 MainTranslator]: Completed translation [2023-02-18 18:20:25,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25 WrapperNode [2023-02-18 18:20:25,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 18:20:25,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 18:20:25,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 18:20:25,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 18:20:25,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,912 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-18 18:20:25,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 18:20:25,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 18:20:25,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 18:20:25,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 18:20:25,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 18:20:25,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 18:20:25,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 18:20:25,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 18:20:25,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (1/1) ... [2023-02-18 18:20:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:20:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:25,958 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) [2023-02-18 18:20:25,965 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 [2023-02-18 18:20:25,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 18:20:25,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 18:20:25,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 18:20:25,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 18:20:25,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 18:20:25,994 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 18:20:26,049 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 18:20:26,051 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 18:20:26,208 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 18:20:26,212 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 18:20:26,212 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 18:20:26,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:20:26 BoogieIcfgContainer [2023-02-18 18:20:26,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 18:20:26,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 18:20:26,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 18:20:26,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 18:20:26,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 06:20:25" (1/3) ... [2023-02-18 18:20:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b93d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:20:26, skipping insertion in model container [2023-02-18 18:20:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:20:25" (2/3) ... [2023-02-18 18:20:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b93d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:20:26, skipping insertion in model container [2023-02-18 18:20:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:20:26" (3/3) ... [2023-02-18 18:20:26,221 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2023-02-18 18:20:26,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 18:20:26,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 18:20:26,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 18:20:26,278 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=PETRI_NET, 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;@462171fe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 18:20:26,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 18:20:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 18:20:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:20:26,287 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:26,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:26,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-18 18:20:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:26,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319434476] [2023-02-18 18:20:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:26,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:26,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319434476] [2023-02-18 18:20:26,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:20:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754851426] [2023-02-18 18:20:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:26,421 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) [2023-02-18 18:20:26,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 18:20:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 18:20:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:20:26,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:20:26,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754851426] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:20:26,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:20:26,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 18:20:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657434460] [2023-02-18 18:20:26,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:20:26,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 18:20:26,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 18:20:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:20:26,570 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:26,599 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-18 18:20:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 18:20:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:20:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:26,606 INFO L225 Difference]: With dead ends: 50 [2023-02-18 18:20:26,606 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 18:20:26,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:20:26,616 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:26,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:20:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 18:20:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 18:20:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:20:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-18 18:20:26,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-18 18:20:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:26,645 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-18 18:20:26,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-18 18:20:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:20:26,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:26,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:26,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:26,848 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 [2023-02-18 18:20:26,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-18 18:20:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:26,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924662332] [2023-02-18 18:20:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:20:27,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:27,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924662332] [2023-02-18 18:20:27,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924662332] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:20:27,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:20:27,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:20:27,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361226908] [2023-02-18 18:20:27,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:20:27,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:20:27,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:20:27,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:20:27,009 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:27,050 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-18 18:20:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:20:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:20:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:27,052 INFO L225 Difference]: With dead ends: 36 [2023-02-18 18:20:27,052 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 18:20:27,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:20:27,054 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:27,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:20:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 18:20:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-18 18:20:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:20:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-18 18:20:27,063 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-18 18:20:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-18 18:20:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-18 18:20:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:20:27,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:27,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:27,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 18:20:27,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-18 18:20:27,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:27,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762202827] [2023-02-18 18:20:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762202827] [2023-02-18 18:20:27,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 18:20:27,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898385666] [2023-02-18 18:20:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:27,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:27,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:27,084 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) [2023-02-18 18:20:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 18:20:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 18:20:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:20:27,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:20:27,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898385666] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:20:27,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:20:27,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:20:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213650703] [2023-02-18 18:20:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:20:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 18:20:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 18:20:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:20:27,181 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:27,196 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-18 18:20:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:20:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 18:20:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:27,197 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:20:27,198 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 18:20:27,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:20:27,199 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:27,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:20:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 18:20:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 18:20:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:20:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 18:20:27,211 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 18:20:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:27,213 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 18:20:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:20:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 18:20:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 18:20:27,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:27,214 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:27,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 18:20:27,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-18 18:20:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020196269] [2023-02-18 18:20:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 18:20:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:20:27,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:27,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020196269] [2023-02-18 18:20:27,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020196269] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:20:27,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:20:27,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:20:27,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701465790] [2023-02-18 18:20:27,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:20:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:20:27,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:20:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:20:27,544 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:20:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:27,620 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-18 18:20:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:20:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-18 18:20:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:27,622 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:20:27,622 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 18:20:27,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:20:27,623 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:27,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:20:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 18:20:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-18 18:20:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:20:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-18 18:20:27,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-18 18:20:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:27,635 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-18 18:20:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:20:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-18 18:20:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 18:20:27,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:27,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 18:20:27,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-18 18:20:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:27,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335794233] [2023-02-18 18:20:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:27,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:27,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91885203] [2023-02-18 18:20:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:27,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:27,666 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) [2023-02-18 18:20:27,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 18:20:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 18:20:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:20:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 18:20:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335794233] [2023-02-18 18:20:27,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:27,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91885203] [2023-02-18 18:20:27,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91885203] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:27,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:27,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 18:20:27,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490532535] [2023-02-18 18:20:27,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:20:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:20:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:20:27,922 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:20:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:28,148 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-18 18:20:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 18:20:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-18 18:20:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:28,151 INFO L225 Difference]: With dead ends: 71 [2023-02-18 18:20:28,151 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 18:20:28,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:20:28,153 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:28,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:20:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 18:20:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-18 18:20:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 18:20:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-18 18:20:28,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-18 18:20:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:28,166 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-18 18:20:28,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 18:20:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-18 18:20:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 18:20:28,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:28,168 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:28,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:28,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:28,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-18 18:20:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:28,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069534794] [2023-02-18 18:20:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:28,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227794754] [2023-02-18 18:20:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:28,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:28,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:28,407 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) [2023-02-18 18:20:28,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 18:20:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 18:20:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 18:20:28,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 18:20:28,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069534794] [2023-02-18 18:20:28,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227794754] [2023-02-18 18:20:28,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227794754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:28,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:28,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-18 18:20:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396283242] [2023-02-18 18:20:28,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 18:20:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 18:20:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:20:28,598 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 18:20:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:28,722 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-18 18:20:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 18:20:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-18 18:20:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:28,725 INFO L225 Difference]: With dead ends: 73 [2023-02-18 18:20:28,725 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 18:20:28,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:20:28,726 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:28,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:20:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 18:20:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-18 18:20:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 18:20:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-18 18:20:28,741 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-18 18:20:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:28,741 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-18 18:20:28,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 18:20:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-18 18:20:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 18:20:28,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:28,742 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:28,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:28,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:28,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-18 18:20:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806168967] [2023-02-18 18:20:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:28,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379186947] [2023-02-18 18:20:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:28,962 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) [2023-02-18 18:20:28,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 18:20:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:20:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 18:20:29,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 18:20:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806168967] [2023-02-18 18:20:29,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379186947] [2023-02-18 18:20:29,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379186947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:29,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:29,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 18:20:29,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547717410] [2023-02-18 18:20:29,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:29,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:20:29,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:20:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:20:29,058 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:20:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:29,138 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-18 18:20:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 18:20:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-18 18:20:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:29,141 INFO L225 Difference]: With dead ends: 165 [2023-02-18 18:20:29,141 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 18:20:29,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:20:29,146 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:29,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:20:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 18:20:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-18 18:20:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-18 18:20:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-18 18:20:29,186 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-18 18:20:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:29,186 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-18 18:20:29,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:20:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-18 18:20:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 18:20:29,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:29,192 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:29,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:29,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:29,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:29,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-18 18:20:29,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:29,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899575732] [2023-02-18 18:20:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:29,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:29,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:29,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500237856] [2023-02-18 18:20:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:29,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:29,408 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) [2023-02-18 18:20:29,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 18:20:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:20:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 18:20:29,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 18:20:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899575732] [2023-02-18 18:20:29,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500237856] [2023-02-18 18:20:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500237856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:29,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:29,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 18:20:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645775537] [2023-02-18 18:20:29,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:20:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:20:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:20:29,506 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:20:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:29,629 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-18 18:20:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:20:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-18 18:20:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:29,631 INFO L225 Difference]: With dead ends: 249 [2023-02-18 18:20:29,631 INFO L226 Difference]: Without dead ends: 228 [2023-02-18 18:20:29,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:20:29,632 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:29,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:20:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-18 18:20:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-18 18:20:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-18 18:20:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-18 18:20:29,658 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-18 18:20:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:29,658 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-18 18:20:29,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:20:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-18 18:20:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 18:20:29,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:29,660 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:29,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:29,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-18 18:20:29,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463104361] [2023-02-18 18:20:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:29,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:29,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041601415] [2023-02-18 18:20:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:29,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:29,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:29,881 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) [2023-02-18 18:20:29,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 18:20:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-18 18:20:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 18:20:30,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 18:20:30,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463104361] [2023-02-18 18:20:30,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041601415] [2023-02-18 18:20:30,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041601415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:30,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:30,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-18 18:20:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813315093] [2023-02-18 18:20:30,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:30,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 18:20:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 18:20:30,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:20:30,280 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 18:20:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:31,677 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-18 18:20:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:20:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-18 18:20:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:31,680 INFO L225 Difference]: With dead ends: 372 [2023-02-18 18:20:31,681 INFO L226 Difference]: Without dead ends: 299 [2023-02-18 18:20:31,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-18 18:20:31,682 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:31,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 18:20:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-18 18:20:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-18 18:20:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 18:20:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-18 18:20:31,736 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-18 18:20:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:31,737 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-18 18:20:31,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-18 18:20:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-18 18:20:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 18:20:31,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:31,738 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:31,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:31,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:31,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-18 18:20:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:31,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250863632] [2023-02-18 18:20:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:31,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:31,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009708267] [2023-02-18 18:20:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:31,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:31,955 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) [2023-02-18 18:20:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 18:20:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 18:20:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 18:20:32,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 18:20:32,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:32,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250863632] [2023-02-18 18:20:32,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009708267] [2023-02-18 18:20:32,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009708267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:32,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:32,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-18 18:20:32,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517801258] [2023-02-18 18:20:32,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:32,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 18:20:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 18:20:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-18 18:20:32,273 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 18:20:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:33,064 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-18 18:20:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 18:20:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-18 18:20:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:33,066 INFO L225 Difference]: With dead ends: 341 [2023-02-18 18:20:33,066 INFO L226 Difference]: Without dead ends: 260 [2023-02-18 18:20:33,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:20:33,067 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:33,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 137 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 18:20:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-18 18:20:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-18 18:20:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 18:20:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-18 18:20:33,108 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-18 18:20:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:33,109 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-18 18:20:33,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-18 18:20:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-18 18:20:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 18:20:33,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:33,110 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:33,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:33,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 18:20:33,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-18 18:20:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:33,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422779253] [2023-02-18 18:20:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:33,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375678318] [2023-02-18 18:20:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:33,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:33,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:33,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:20:33,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 18:20:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 18:20:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-18 18:20:33,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-18 18:20:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422779253] [2023-02-18 18:20:33,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375678318] [2023-02-18 18:20:33,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375678318] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:33,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:33,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-18 18:20:33,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438987973] [2023-02-18 18:20:33,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:33,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 18:20:33,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:33,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 18:20:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:20:33,538 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-18 18:20:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:33,784 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2023-02-18 18:20:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 18:20:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 74 [2023-02-18 18:20:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:33,786 INFO L225 Difference]: With dead ends: 263 [2023-02-18 18:20:33,786 INFO L226 Difference]: Without dead ends: 218 [2023-02-18 18:20:33,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:20:33,787 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 267 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:20:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-18 18:20:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-02-18 18:20:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-18 18:20:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2023-02-18 18:20:33,827 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2023-02-18 18:20:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:33,827 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2023-02-18 18:20:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-18 18:20:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2023-02-18 18:20:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 18:20:33,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:33,828 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 18:20:33,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:34,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:34,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-18 18:20:34,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:34,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662458435] [2023-02-18 18:20:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:34,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:34,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37591509] [2023-02-18 18:20:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:20:34,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:34,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:20:34,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 18:20:34,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:20:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:20:34,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 18:20:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 18:20:34,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-18 18:20:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662458435] [2023-02-18 18:20:35,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:35,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37591509] [2023-02-18 18:20:35,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37591509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:35,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:35,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-18 18:20:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638444673] [2023-02-18 18:20:35,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:35,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 18:20:35,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 18:20:35,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:20:35,923 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 18:20:40,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:20:45,306 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 [] [2023-02-18 18:20:46,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:46,293 INFO L93 Difference]: Finished difference Result 309 states and 397 transitions. [2023-02-18 18:20:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 18:20:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-18 18:20:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:46,295 INFO L225 Difference]: With dead ends: 309 [2023-02-18 18:20:46,295 INFO L226 Difference]: Without dead ends: 259 [2023-02-18 18:20:46,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-02-18 18:20:46,296 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 153 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:46,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 331 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-02-18 18:20:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-18 18:20:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2023-02-18 18:20:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 174 states have internal predecessors, (200), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-18 18:20:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2023-02-18 18:20:46,436 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 90 [2023-02-18 18:20:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:46,437 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2023-02-18 18:20:46,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 18:20:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2023-02-18 18:20:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 18:20:46,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:46,439 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:46,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 18:20:46,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-18 18:20:46,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:46,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120080410] [2023-02-18 18:20:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:46,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:46,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487337641] [2023-02-18 18:20:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:46,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:46,651 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:20:46,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 18:20:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:20:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 18:20:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 18:20:46,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-18 18:20:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:46,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120080410] [2023-02-18 18:20:46,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:46,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487337641] [2023-02-18 18:20:46,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487337641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:46,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:46,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 18:20:46,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15477871] [2023-02-18 18:20:46,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:46,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 18:20:46,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 18:20:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 18:20:46,793 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 18:20:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:20:47,352 INFO L93 Difference]: Finished difference Result 703 states and 939 transitions. [2023-02-18 18:20:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 18:20:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-18 18:20:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:20:47,356 INFO L225 Difference]: With dead ends: 703 [2023-02-18 18:20:47,356 INFO L226 Difference]: Without dead ends: 628 [2023-02-18 18:20:47,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:20:47,357 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 160 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:20:47,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 297 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:20:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-02-18 18:20:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 543. [2023-02-18 18:20:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 386 states have internal predecessors, (461), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-18 18:20:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 718 transitions. [2023-02-18 18:20:47,668 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 718 transitions. Word has length 96 [2023-02-18 18:20:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:20:47,668 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 718 transitions. [2023-02-18 18:20:47,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 18:20:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 718 transitions. [2023-02-18 18:20:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-18 18:20:47,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:20:47,670 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:20:47,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 18:20:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 18:20:47,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:20:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:20:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-18 18:20:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:20:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611017078] [2023-02-18 18:20:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:20:47,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:20:47,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:20:47,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425080674] [2023-02-18 18:20:47,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:20:47,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:20:47,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:20:47,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:20:47,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 18:20:47,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:20:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:20:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 18:20:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:20:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 18:20:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:20:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-18 18:20:49,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:20:49,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611017078] [2023-02-18 18:20:49,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:20:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425080674] [2023-02-18 18:20:49,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425080674] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:20:49,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:20:49,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-18 18:20:49,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406876121] [2023-02-18 18:20:49,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:20:49,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 18:20:49,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:20:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 18:20:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-18 18:20:49,180 INFO L87 Difference]: Start difference. First operand 543 states and 718 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:20:51,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:20:53,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:20:55,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 18:20:59,564 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 [] [2023-02-18 18:21:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:01,091 INFO L93 Difference]: Finished difference Result 674 states and 887 transitions. [2023-02-18 18:21:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 18:21:01,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2023-02-18 18:21:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:01,095 INFO L225 Difference]: With dead ends: 674 [2023-02-18 18:21:01,095 INFO L226 Difference]: Without dead ends: 546 [2023-02-18 18:21:01,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-02-18 18:21:01,096 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 104 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:01,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 235 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 876 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2023-02-18 18:21:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-18 18:21:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 498. [2023-02-18 18:21:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 330 states have (on average 1.2333333333333334) internal successors, (407), 352 states have internal predecessors, (407), 114 states have call successors, (114), 53 states have call predecessors, (114), 53 states have return successors, (111), 92 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-18 18:21:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 632 transitions. [2023-02-18 18:21:01,415 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 632 transitions. Word has length 101 [2023-02-18 18:21:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:01,416 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 632 transitions. [2023-02-18 18:21:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:21:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 632 transitions. [2023-02-18 18:21:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-18 18:21:01,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:01,417 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:01,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:01,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 18:21:01,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-18 18:21:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928026664] [2023-02-18 18:21:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:01,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:01,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:01,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828319753] [2023-02-18 18:21:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:01,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:01,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:01,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:01,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 18:21:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:21:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 18:21:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-18 18:21:01,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-18 18:21:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:01,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928026664] [2023-02-18 18:21:01,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828319753] [2023-02-18 18:21:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828319753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:21:01,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:21:01,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 18:21:01,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167635745] [2023-02-18 18:21:01,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:01,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:21:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:21:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:21:01,786 INFO L87 Difference]: Start difference. First operand 498 states and 632 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:21:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:02,620 INFO L93 Difference]: Finished difference Result 986 states and 1288 transitions. [2023-02-18 18:21:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 18:21:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2023-02-18 18:21:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:02,624 INFO L225 Difference]: With dead ends: 986 [2023-02-18 18:21:02,625 INFO L226 Difference]: Without dead ends: 947 [2023-02-18 18:21:02,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-18 18:21:02,626 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 249 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:02,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 377 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:21:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-18 18:21:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 922. [2023-02-18 18:21:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 610 states have (on average 1.1704918032786886) internal successors, (714), 654 states have internal predecessors, (714), 223 states have call successors, (223), 89 states have call predecessors, (223), 88 states have return successors, (215), 178 states have call predecessors, (215), 215 states have call successors, (215) [2023-02-18 18:21:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1152 transitions. [2023-02-18 18:21:03,155 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1152 transitions. Word has length 104 [2023-02-18 18:21:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:03,156 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1152 transitions. [2023-02-18 18:21:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-18 18:21:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1152 transitions. [2023-02-18 18:21:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 18:21:03,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:03,161 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:03,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:03,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 18:21:03,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:03,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2023-02-18 18:21:03,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:03,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676829406] [2023-02-18 18:21:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:03,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:03,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:03,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610078919] [2023-02-18 18:21:03,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:21:03,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:03,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:03,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:03,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 18:21:03,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:21:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:21:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 18:21:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 18:21:03,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-18 18:21:03,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676829406] [2023-02-18 18:21:03,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610078919] [2023-02-18 18:21:03,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610078919] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:21:03,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:21:03,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-02-18 18:21:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909812105] [2023-02-18 18:21:03,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:03,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 18:21:03,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 18:21:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:21:03,884 INFO L87 Difference]: Start difference. First operand 922 states and 1152 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 18:21:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:05,515 INFO L93 Difference]: Finished difference Result 1139 states and 1407 transitions. [2023-02-18 18:21:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 18:21:05,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 106 [2023-02-18 18:21:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:05,519 INFO L225 Difference]: With dead ends: 1139 [2023-02-18 18:21:05,520 INFO L226 Difference]: Without dead ends: 834 [2023-02-18 18:21:05,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:21:05,521 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 243 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 18:21:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-18 18:21:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2023-02-18 18:21:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 551 states have (on average 1.1506352087114338) internal successors, (634), 589 states have internal predecessors, (634), 197 states have call successors, (197), 77 states have call predecessors, (197), 77 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-18 18:21:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1020 transitions. [2023-02-18 18:21:05,961 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1020 transitions. Word has length 106 [2023-02-18 18:21:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:05,961 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1020 transitions. [2023-02-18 18:21:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-18 18:21:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1020 transitions. [2023-02-18 18:21:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-18 18:21:05,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:05,963 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-18 18:21:05,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:06,169 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-18 18:21:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:06,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111458106] [2023-02-18 18:21:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:06,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:06,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567091466] [2023-02-18 18:21:06,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:21:06,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:06,177 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 18:21:06,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:21:06,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:21:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 18:21:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-18 18:21:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:06,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111458106] [2023-02-18 18:21:06,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567091466] [2023-02-18 18:21:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567091466] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 18:21:06,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 18:21:06,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-18 18:21:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682876039] [2023-02-18 18:21:06,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:06,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:21:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:21:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:21:06,807 INFO L87 Difference]: Start difference. First operand 826 states and 1020 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 18:21:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:07,425 INFO L93 Difference]: Finished difference Result 857 states and 1050 transitions. [2023-02-18 18:21:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 18:21:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-02-18 18:21:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:07,429 INFO L225 Difference]: With dead ends: 857 [2023-02-18 18:21:07,429 INFO L226 Difference]: Without dead ends: 843 [2023-02-18 18:21:07,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-18 18:21:07,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:07,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 66 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:21:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2023-02-18 18:21:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 827. [2023-02-18 18:21:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 556 states have (on average 1.1384892086330936) internal successors, (633), 588 states have internal predecessors, (633), 192 states have call successors, (192), 79 states have call predecessors, (192), 78 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-18 18:21:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1014 transitions. [2023-02-18 18:21:07,804 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1014 transitions. Word has length 122 [2023-02-18 18:21:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:07,804 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1014 transitions. [2023-02-18 18:21:07,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 18:21:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1014 transitions. [2023-02-18 18:21:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-18 18:21:07,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:07,807 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:07,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:08,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 18:21:08,015 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-18 18:21:08,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:08,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646672598] [2023-02-18 18:21:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:08,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866131764] [2023-02-18 18:21:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:21:08,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:08,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:08,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 18:21:08,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:21:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:21:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 18:21:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-18 18:21:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 18:21:08,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646672598] [2023-02-18 18:21:08,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866131764] [2023-02-18 18:21:08,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866131764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:21:08,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:21:08,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-18 18:21:08,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790564516] [2023-02-18 18:21:08,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:08,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 18:21:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 18:21:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 18:21:08,227 INFO L87 Difference]: Start difference. First operand 827 states and 1014 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:21:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:08,804 INFO L93 Difference]: Finished difference Result 834 states and 1020 transitions. [2023-02-18 18:21:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 18:21:08,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-18 18:21:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:08,808 INFO L225 Difference]: With dead ends: 834 [2023-02-18 18:21:08,808 INFO L226 Difference]: Without dead ends: 824 [2023-02-18 18:21:08,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-18 18:21:08,809 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:08,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 104 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:21:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-18 18:21:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 525. [2023-02-18 18:21:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 352 states have (on average 1.1107954545454546) internal successors, (391), 371 states have internal predecessors, (391), 109 states have call successors, (109), 63 states have call predecessors, (109), 63 states have return successors, (108), 90 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-18 18:21:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 608 transitions. [2023-02-18 18:21:09,210 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 608 transitions. Word has length 133 [2023-02-18 18:21:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:09,211 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 608 transitions. [2023-02-18 18:21:09,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 18:21:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 608 transitions. [2023-02-18 18:21:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-18 18:21:09,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:09,214 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:09,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:09,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 18:21:09,420 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 888958317, now seen corresponding path program 1 times [2023-02-18 18:21:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:09,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030374376] [2023-02-18 18:21:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:09,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:09,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106409835] [2023-02-18 18:21:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:09,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:09,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 18:21:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:21:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 18:21:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 18:21:09,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-02-18 18:21:09,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030374376] [2023-02-18 18:21:09,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106409835] [2023-02-18 18:21:09,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106409835] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:21:09,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:21:09,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2023-02-18 18:21:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720129109] [2023-02-18 18:21:09,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 18:21:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 18:21:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-02-18 18:21:09,830 INFO L87 Difference]: Start difference. First operand 525 states and 608 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) [2023-02-18 18:21:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:10,956 INFO L93 Difference]: Finished difference Result 809 states and 970 transitions. [2023-02-18 18:21:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 18:21:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) Word has length 220 [2023-02-18 18:21:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:10,959 INFO L225 Difference]: With dead ends: 809 [2023-02-18 18:21:10,959 INFO L226 Difference]: Without dead ends: 796 [2023-02-18 18:21:10,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 406 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 18:21:10,961 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 227 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:10,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 466 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 18:21:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2023-02-18 18:21:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 795. [2023-02-18 18:21:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 532 states have (on average 1.118421052631579) internal successors, (595), 563 states have internal predecessors, (595), 169 states have call successors, (169), 93 states have call predecessors, (169), 93 states have return successors, (168), 138 states have call predecessors, (168), 168 states have call successors, (168) [2023-02-18 18:21:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 932 transitions. [2023-02-18 18:21:11,462 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 932 transitions. Word has length 220 [2023-02-18 18:21:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:11,463 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 932 transitions. [2023-02-18 18:21:11,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 24 states have internal predecessors, (140), 20 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 19 states have call predecessors, (64), 19 states have call successors, (64) [2023-02-18 18:21:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 932 transitions. [2023-02-18 18:21:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-02-18 18:21:11,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:11,468 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:11,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:11,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:11,675 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1616344757, now seen corresponding path program 2 times [2023-02-18 18:21:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:11,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066504058] [2023-02-18 18:21:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:11,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:11,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:11,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066703414] [2023-02-18 18:21:11,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:21:11,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:11,696 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:11,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 18:21:11,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:21:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:21:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 18:21:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:21:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2023-02-18 18:21:11,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:21:12,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:21:12,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066504058] [2023-02-18 18:21:12,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:21:12,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066703414] [2023-02-18 18:21:12,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066703414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 18:21:12,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 18:21:12,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-18 18:21:12,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871059872] [2023-02-18 18:21:12,215 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 18:21:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 18:21:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 18:21:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 18:21:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-18 18:21:12,216 INFO L87 Difference]: Start difference. First operand 795 states and 932 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-18 18:21:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:21:13,076 INFO L93 Difference]: Finished difference Result 1119 states and 1333 transitions. [2023-02-18 18:21:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:21:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 304 [2023-02-18 18:21:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:21:13,085 INFO L225 Difference]: With dead ends: 1119 [2023-02-18 18:21:13,085 INFO L226 Difference]: Without dead ends: 768 [2023-02-18 18:21:13,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 492 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-02-18 18:21:13,086 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 18 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:21:13,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:21:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-02-18 18:21:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2023-02-18 18:21:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 514 states have (on average 1.1167315175097277) internal successors, (574), 543 states have internal predecessors, (574), 162 states have call successors, (162), 91 states have call predecessors, (162), 91 states have return successors, (161), 133 states have call predecessors, (161), 161 states have call successors, (161) [2023-02-18 18:21:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 897 transitions. [2023-02-18 18:21:13,560 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 897 transitions. Word has length 304 [2023-02-18 18:21:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:21:13,560 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 897 transitions. [2023-02-18 18:21:13,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-02-18 18:21:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 897 transitions. [2023-02-18 18:21:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-02-18 18:21:13,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:21:13,566 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 16, 15, 15, 15, 15, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:21:13,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 18:21:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:13,774 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:21:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:21:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash -839385710, now seen corresponding path program 3 times [2023-02-18 18:21:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 18:21:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403709878] [2023-02-18 18:21:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:21:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 18:21:13,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 18:21:13,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650977853] [2023-02-18 18:21:13,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:21:13,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:21:13,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:21:13,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 18:21:13,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 18:21:14,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-02-18 18:21:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:21:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-18 18:21:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:29:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 18:29:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403709878] [2023-02-18 18:29:57,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 18:29:57,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650977853] [2023-02-18 18:29:57,272 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2023-02-18 18:29:57,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 18:29:57,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 18:29:57,473 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Probably an infinite loop! at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtils.preprocessDualFiniteJunction(QuantifierPushUtils.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:323) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-02-18 18:29:57,476 INFO L158 Benchmark]: Toolchain (without parser) took 571772.48ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 943.7MB). Free memory was 107.4MB in the beginning and 766.1MB in the end (delta: -658.8MB). Peak memory consumption was 658.0MB. Max. memory is 16.1GB. [2023-02-18 18:29:57,477 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 96.6MB in the beginning and 96.6MB in the end (delta: 27.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 18:29:57,477 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.57ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 96.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 18:29:57,477 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.92ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 95.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 18:29:57,477 INFO L158 Benchmark]: Boogie Preprocessor took 17.41ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 18:29:57,477 INFO L158 Benchmark]: RCFGBuilder took 283.08ms. Allocated memory is still 142.6MB. Free memory was 94.0MB in the beginning and 83.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 18:29:57,479 INFO L158 Benchmark]: TraceAbstraction took 571259.70ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 943.7MB). Free memory was 82.7MB in the beginning and 766.1MB in the end (delta: -683.4MB). Peak memory consumption was 634.9MB. Max. memory is 16.1GB. [2023-02-18 18:29:57,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 142.6MB. Free memory was 96.6MB in the beginning and 96.6MB in the end (delta: 27.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.57ms. Allocated memory is still 142.6MB. Free memory was 107.4MB in the beginning and 96.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.92ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 95.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.41ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.08ms. Allocated memory is still 142.6MB. Free memory was 94.0MB in the beginning and 83.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 571259.70ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 943.7MB). Free memory was 82.7MB in the beginning and 766.1MB in the end (delta: -683.4MB). Peak memory consumption was 634.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Probably an infinite loop! de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Probably an infinite loop!: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtils.preprocessDualFiniteJunction(QuantifierPushUtils.java:124) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-02-18 18:29:57,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 18:29:59,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 18:29:59,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 18:29:59,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 18:29:59,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 18:29:59,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 18:29:59,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 18:29:59,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 18:29:59,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 18:29:59,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 18:29:59,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 18:29:59,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 18:29:59,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 18:29:59,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 18:29:59,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 18:29:59,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 18:29:59,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 18:29:59,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 18:29:59,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 18:29:59,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 18:29:59,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 18:29:59,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 18:29:59,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 18:29:59,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 18:29:59,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 18:29:59,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 18:29:59,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 18:29:59,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 18:29:59,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 18:29:59,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 18:29:59,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 18:29:59,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 18:29:59,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 18:29:59,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 18:29:59,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 18:29:59,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 18:29:59,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 18:29:59,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 18:29:59,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 18:29:59,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 18:29:59,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 18:29:59,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-18 18:29:59,749 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 18:29:59,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 18:29:59,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 18:29:59,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 18:29:59,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 18:29:59,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 18:29:59,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 18:29:59,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 18:29:59,752 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 18:29:59,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 18:29:59,753 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 18:29:59,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 18:29:59,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 18:29:59,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 18:29:59,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 18:29:59,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 18:29:59,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 18:29:59,755 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-18 18:29:59,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-18 18:29:59,755 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 18:29:59,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 18:29:59,756 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 18:29:59,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 18:29:59,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:29:59,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 18:29:59,765 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 18:29:59,766 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2023-02-18 18:30:00,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 18:30:00,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 18:30:00,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 18:30:00,062 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 18:30:00,062 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 18:30:00,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2023-02-18 18:30:01,274 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 18:30:01,496 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 18:30:01,497 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2023-02-18 18:30:01,503 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a10f8960/54bec2ab76cd480f9af2d759c81d1785/FLAG0d3bea2f6 [2023-02-18 18:30:01,525 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a10f8960/54bec2ab76cd480f9af2d759c81d1785 [2023-02-18 18:30:01,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 18:30:01,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 18:30:01,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 18:30:01,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 18:30:01,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 18:30:01,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b48ea96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01, skipping insertion in model container [2023-02-18 18:30:01,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 18:30:01,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 18:30:01,717 WARN L237 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/hard2_unwindbound20.c[526,539] [2023-02-18 18:30:01,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:30:01,750 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 18:30:01,766 WARN L237 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/hard2_unwindbound20.c[526,539] [2023-02-18 18:30:01,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 18:30:01,798 INFO L208 MainTranslator]: Completed translation [2023-02-18 18:30:01,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01 WrapperNode [2023-02-18 18:30:01,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 18:30:01,802 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 18:30:01,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 18:30:01,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 18:30:01,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,837 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-02-18 18:30:01,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 18:30:01,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 18:30:01,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 18:30:01,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 18:30:01,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 18:30:01,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 18:30:01,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 18:30:01,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 18:30:01,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (1/1) ... [2023-02-18 18:30:01,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 18:30:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 18:30:01,922 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) [2023-02-18 18:30:01,952 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 [2023-02-18 18:30:01,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 18:30:01,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-18 18:30:01,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 18:30:01,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 18:30:01,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 18:30:01,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 18:30:02,033 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 18:30:02,035 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 18:30:02,311 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 18:30:02,315 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 18:30:02,316 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 18:30:02,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:30:02 BoogieIcfgContainer [2023-02-18 18:30:02,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 18:30:02,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 18:30:02,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 18:30:02,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 18:30:02,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 06:30:01" (1/3) ... [2023-02-18 18:30:02,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f762908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:30:02, skipping insertion in model container [2023-02-18 18:30:02,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 06:30:01" (2/3) ... [2023-02-18 18:30:02,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f762908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 06:30:02, skipping insertion in model container [2023-02-18 18:30:02,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 06:30:02" (3/3) ... [2023-02-18 18:30:02,325 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2023-02-18 18:30:02,339 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 18:30:02,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 18:30:02,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 18:30:02,395 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=PETRI_NET, 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;@3e177e2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 18:30:02,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 18:30:02,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 18:30:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:30:02,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:02,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:02,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-18 18:30:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:02,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552754185] [2023-02-18 18:30:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:02,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:02,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:02,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:02,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-18 18:30:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:02,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 18:30:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:30:02,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:02,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:02,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552754185] [2023-02-18 18:30:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552754185] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:02,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:02,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 18:30:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192485090] [2023-02-18 18:30:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 18:30:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 18:30:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:30:02,578 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:02,611 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-18 18:30:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 18:30:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:30:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:02,619 INFO L225 Difference]: With dead ends: 50 [2023-02-18 18:30:02,620 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 18:30:02,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 18:30:02,628 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:02,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:30:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 18:30:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 18:30:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:30:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-18 18:30:02,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-18 18:30:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:02,666 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-18 18:30:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-18 18:30:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 18:30:02,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:02,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:02,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:02,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:02,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-18 18:30:02,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:02,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311708468] [2023-02-18 18:30:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:02,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:02,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:02,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:02,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-18 18:30:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 18:30:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:30:02,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:02,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311708468] [2023-02-18 18:30:02,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311708468] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:02,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:02,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:30:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364720417] [2023-02-18 18:30:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:30:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:30:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:30:02,997 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:03,112 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-18 18:30:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:30:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 18:30:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:03,115 INFO L225 Difference]: With dead ends: 36 [2023-02-18 18:30:03,115 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 18:30:03,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:30:03,116 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:03,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 100 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:30:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 18:30:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-18 18:30:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:30:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-18 18:30:03,130 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-18 18:30:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:03,130 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-18 18:30:03,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-18 18:30:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 18:30:03,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:03,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:03,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:03,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:03,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-18 18:30:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:03,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254576222] [2023-02-18 18:30:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:03,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:03,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 18:30:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:03,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-18 18:30:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:30:03,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:03,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:03,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254576222] [2023-02-18 18:30:03,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254576222] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:03,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:03,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:30:03,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236002798] [2023-02-18 18:30:03,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:03,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 18:30:03,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 18:30:03,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:30:03,555 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:03,572 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-18 18:30:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 18:30:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 18:30:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:03,574 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:30:03,574 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 18:30:03,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 18:30:03,576 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:03,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 18:30:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 18:30:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 18:30:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:30:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-18 18:30:03,582 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-18 18:30:03,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:03,582 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-18 18:30:03,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 18:30:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-18 18:30:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 18:30:03,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:03,583 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:03,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:03,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:03,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-18 18:30:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:03,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436490469] [2023-02-18 18:30:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:03,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:03,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:03,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-18 18:30:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 18:30:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 18:30:03,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:03,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436490469] [2023-02-18 18:30:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436490469] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:03,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:03,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:30:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010479674] [2023-02-18 18:30:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:30:03,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:30:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:30:03,852 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:30:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:03,991 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-18 18:30:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:30:03,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-18 18:30:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:03,993 INFO L225 Difference]: With dead ends: 42 [2023-02-18 18:30:03,993 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 18:30:03,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:30:03,994 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:03,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 18:30:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 18:30:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-18 18:30:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 18:30:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-18 18:30:04,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-18 18:30:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:04,003 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-18 18:30:04,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 18:30:04,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-18 18:30:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 18:30:04,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:04,004 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:04,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:04,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:04,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-18 18:30:04,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:04,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044639723] [2023-02-18 18:30:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:04,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:04,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:04,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:04,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-18 18:30:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 18:30:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 18:30:04,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:04,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044639723] [2023-02-18 18:30:04,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044639723] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:04,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:04,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:30:04,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582291957] [2023-02-18 18:30:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:04,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:30:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:04,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:30:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:30:04,287 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 18:30:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:04,527 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2023-02-18 18:30:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:30:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-02-18 18:30:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:04,529 INFO L225 Difference]: With dead ends: 61 [2023-02-18 18:30:04,529 INFO L226 Difference]: Without dead ends: 46 [2023-02-18 18:30:04,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:30:04,530 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:04,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:30:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-18 18:30:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-18 18:30:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 18:30:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-18 18:30:04,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2023-02-18 18:30:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-18 18:30:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 18:30:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-18 18:30:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 18:30:04,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:04,542 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:04,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-02-18 18:30:04,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:04,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-18 18:30:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672015990] [2023-02-18 18:30:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:04,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:04,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-18 18:30:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:30:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 18:30:04,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:30:04,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672015990] [2023-02-18 18:30:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672015990] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:30:04,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:30:04,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 18:30:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309724696] [2023-02-18 18:30:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 18:30:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 18:30:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 18:30:04,849 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:30:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:05,042 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2023-02-18 18:30:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 18:30:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-02-18 18:30:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:05,044 INFO L225 Difference]: With dead ends: 60 [2023-02-18 18:30:05,044 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 18:30:05,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 18:30:05,045 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:05,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 18:30:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 18:30:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-18 18:30:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 18:30:05,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-18 18:30:05,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2023-02-18 18:30:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:05,053 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-18 18:30:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 18:30:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-18 18:30:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 18:30:05,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:05,055 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:05,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:05,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:05,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2023-02-18 18:30:05,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:05,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789935274] [2023-02-18 18:30:05,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:05,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:05,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-02-18 18:30:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 18:30:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 18:30:05,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:30:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 18:30:05,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789935274] [2023-02-18 18:30:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789935274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:30:05,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:30:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 18:30:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080906561] [2023-02-18 18:30:05,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:30:05,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 18:30:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 18:30:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 18:30:05,426 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:30:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:05,789 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2023-02-18 18:30:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 18:30:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-18 18:30:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:05,792 INFO L225 Difference]: With dead ends: 140 [2023-02-18 18:30:05,792 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 18:30:05,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 18:30:05,794 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:05,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 194 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 18:30:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 18:30:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2023-02-18 18:30:05,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 73 states have internal predecessors, (85), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 18:30:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2023-02-18 18:30:05,815 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 33 [2023-02-18 18:30:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:05,816 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2023-02-18 18:30:05,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 18:30:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2023-02-18 18:30:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 18:30:05,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:05,818 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:05,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:06,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:06,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2023-02-18 18:30:06,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:06,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927988699] [2023-02-18 18:30:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:06,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:06,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-02-18 18:30:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 18:30:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 18:30:06,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:30:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 18:30:06,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927988699] [2023-02-18 18:30:06,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927988699] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 18:30:06,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 18:30:06,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-02-18 18:30:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234340645] [2023-02-18 18:30:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:30:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 18:30:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 18:30:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:30:06,450 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 18:30:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:07,138 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2023-02-18 18:30:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 18:30:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-02-18 18:30:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:07,139 INFO L225 Difference]: With dead ends: 125 [2023-02-18 18:30:07,139 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 18:30:07,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 18:30:07,140 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:07,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 86 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 18:30:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 18:30:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2023-02-18 18:30:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 18:30:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-02-18 18:30:07,158 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2023-02-18 18:30:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:07,158 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-02-18 18:30:07,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 18:30:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-02-18 18:30:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 18:30:07,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:07,160 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:07,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:07,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-18 18:30:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288120044] [2023-02-18 18:30:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:07,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:07,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:07,372 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:07,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-18 18:30:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 18:30:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 18:30:07,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:30:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 18:30:07,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288120044] [2023-02-18 18:30:07,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288120044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:30:07,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:30:07,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-18 18:30:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104570904] [2023-02-18 18:30:07,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:30:07,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 18:30:07,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:07,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 18:30:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 18:30:07,513 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:30:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:30:08,355 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2023-02-18 18:30:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:30:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-18 18:30:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:30:08,358 INFO L225 Difference]: With dead ends: 241 [2023-02-18 18:30:08,358 INFO L226 Difference]: Without dead ends: 220 [2023-02-18 18:30:08,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 18:30:08,359 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 74 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 18:30:08,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 18:30:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-02-18 18:30:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2023-02-18 18:30:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2023-02-18 18:30:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2023-02-18 18:30:08,386 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2023-02-18 18:30:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:30:08,386 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2023-02-18 18:30:08,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 18:30:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2023-02-18 18:30:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 18:30:08,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:30:08,388 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:30:08,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-02-18 18:30:08,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:08,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:30:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:30:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-18 18:30:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:30:08,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553247284] [2023-02-18 18:30:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:30:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:30:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:30:08,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:30:08,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-18 18:30:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:30:08,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 18:30:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:30:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:30:08,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:30:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-18 18:30:13,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:30:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553247284] [2023-02-18 18:30:13,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553247284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:30:13,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:30:13,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-18 18:30:13,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679385367] [2023-02-18 18:30:13,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:30:13,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 18:30:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:30:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 18:30:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-02-18 18:30:13,667 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:30:23,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:25,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:30,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:32,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:34,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:39,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:44,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:30:49,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:05,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:22,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:31,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:33,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:35,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:43,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:46,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:50,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:52,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:55,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:31:57,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:32:01,727 INFO L93 Difference]: Finished difference Result 392 states and 500 transitions. [2023-02-18 18:32:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 18:32:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 58 [2023-02-18 18:32:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:32:01,748 INFO L225 Difference]: With dead ends: 392 [2023-02-18 18:32:01,749 INFO L226 Difference]: Without dead ends: 316 [2023-02-18 18:32:01,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=177, Invalid=572, Unknown=7, NotChecked=0, Total=756 [2023-02-18 18:32:01,750 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 86 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 124 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.1s IncrementalHoareTripleChecker+Time [2023-02-18 18:32:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 345 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 621 Invalid, 17 Unknown, 0 Unchecked, 73.1s Time] [2023-02-18 18:32:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-18 18:32:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 255. [2023-02-18 18:32:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 179 states have internal predecessors, (200), 51 states have call successors, (51), 33 states have call predecessors, (51), 33 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-18 18:32:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 299 transitions. [2023-02-18 18:32:01,814 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 299 transitions. Word has length 58 [2023-02-18 18:32:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:32:01,814 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 299 transitions. [2023-02-18 18:32:01,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-18 18:32:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 299 transitions. [2023-02-18 18:32:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 18:32:01,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:32:01,818 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:32:01,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-02-18 18:32:02,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:02,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:32:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:32:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-18 18:32:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:32:02,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336800075] [2023-02-18 18:32:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:32:02,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:32:02,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:32:02,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-02-18 18:32:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:32:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 18:32:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:32:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-18 18:32:02,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:32:03,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:32:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336800075] [2023-02-18 18:32:03,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336800075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 18:32:03,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [312145625] [2023-02-18 18:32:03,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:32:03,360 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 18:32:03,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 18:32:03,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 18:32:03,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-02-18 18:32:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:32:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 18:32:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:32:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:32:04,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:32:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 18:32:07,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [312145625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:32:07,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 18:32:07,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-02-18 18:32:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84276959] [2023-02-18 18:32:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 18:32:07,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 18:32:07,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:32:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 18:32:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-02-18 18:32:07,438 INFO L87 Difference]: Start difference. First operand 255 states and 299 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:32:16,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:22,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:29,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:36,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:46,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:48,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:50,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:32:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:32:53,937 INFO L93 Difference]: Finished difference Result 346 states and 424 transitions. [2023-02-18 18:32:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 18:32:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) Word has length 69 [2023-02-18 18:32:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:32:53,943 INFO L225 Difference]: With dead ends: 346 [2023-02-18 18:32:53,943 INFO L226 Difference]: Without dead ends: 270 [2023-02-18 18:32:53,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=134, Invalid=620, Unknown=2, NotChecked=0, Total=756 [2023-02-18 18:32:53,945 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 75 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2023-02-18 18:32:53,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 214 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 599 Invalid, 7 Unknown, 0 Unchecked, 33.7s Time] [2023-02-18 18:32:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-18 18:32:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2023-02-18 18:32:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 158 states have (on average 1.1962025316455696) internal successors, (189), 162 states have internal predecessors, (189), 47 states have call successors, (47), 30 states have call predecessors, (47), 29 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-18 18:32:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 280 transitions. [2023-02-18 18:32:53,990 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 280 transitions. Word has length 69 [2023-02-18 18:32:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:32:53,991 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 280 transitions. [2023-02-18 18:32:53,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 18:32:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 280 transitions. [2023-02-18 18:32:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-18 18:32:53,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:32:53,993 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:32:53,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-02-18 18:32:54,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-02-18 18:32:54,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:54,397 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:32:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:32:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1687889621, now seen corresponding path program 1 times [2023-02-18 18:32:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:32:54,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244025441] [2023-02-18 18:32:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 18:32:54,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:32:54,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:32:54,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-02-18 18:32:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 18:32:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 18:32:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:32:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-02-18 18:32:54,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 18:32:54,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:32:54,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244025441] [2023-02-18 18:32:54,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244025441] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 18:32:54,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 18:32:54,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 18:32:54,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390110056] [2023-02-18 18:32:54,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 18:32:54,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 18:32:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:32:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 18:32:54,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 18:32:54,561 INFO L87 Difference]: Start difference. First operand 235 states and 280 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 18:32:56,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 18:32:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:32:58,028 INFO L93 Difference]: Finished difference Result 259 states and 304 transitions. [2023-02-18 18:32:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 18:32:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2023-02-18 18:32:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:32:58,030 INFO L225 Difference]: With dead ends: 259 [2023-02-18 18:32:58,030 INFO L226 Difference]: Without dead ends: 229 [2023-02-18 18:32:58,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 18:32:58,031 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-18 18:32:58,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 72 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-18 18:32:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-02-18 18:32:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2023-02-18 18:32:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 157 states have internal predecessors, (181), 45 states have call successors, (45), 28 states have call predecessors, (45), 28 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2023-02-18 18:32:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 269 transitions. [2023-02-18 18:32:58,074 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 269 transitions. Word has length 78 [2023-02-18 18:32:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:32:58,075 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 269 transitions. [2023-02-18 18:32:58,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 18:32:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 269 transitions. [2023-02-18 18:32:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 18:32:58,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:32:58,078 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 18:32:58,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-02-18 18:32:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:58,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:32:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:32:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1867294778, now seen corresponding path program 2 times [2023-02-18 18:32:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:32:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108718798] [2023-02-18 18:32:58,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 18:32:58,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:32:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:32:58,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:32:58,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-02-18 18:32:58,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 18:32:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:32:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 18:32:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:32:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-18 18:32:58,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:33:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-18 18:33:02,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:33:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108718798] [2023-02-18 18:33:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108718798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 18:33:02,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 18:33:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-02-18 18:33:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587528556] [2023-02-18 18:33:02,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 18:33:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 18:33:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 18:33:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 18:33:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-18 18:33:02,337 INFO L87 Difference]: Start difference. First operand 227 states and 269 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 7 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-18 18:33:10,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:16,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:18,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:20,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:22,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:24,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:27,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:30,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:32,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:33,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:35,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:38,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:40,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:44,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:46,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:49,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:53,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 18:33:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 18:33:54,230 INFO L93 Difference]: Finished difference Result 328 states and 412 transitions. [2023-02-18 18:33:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 18:33:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 7 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 81 [2023-02-18 18:33:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 18:33:54,244 INFO L225 Difference]: With dead ends: 328 [2023-02-18 18:33:54,244 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 18:33:54,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2023-02-18 18:33:54,245 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 33 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.3s IncrementalHoareTripleChecker+Time [2023-02-18 18:33:54,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 440 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 363 Invalid, 16 Unknown, 0 Unchecked, 46.3s Time] [2023-02-18 18:33:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 18:33:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 262. [2023-02-18 18:33:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 174 states have (on average 1.1724137931034482) internal successors, (204), 181 states have internal predecessors, (204), 56 states have call successors, (56), 31 states have call predecessors, (56), 31 states have return successors, (54), 49 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 18:33:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 314 transitions. [2023-02-18 18:33:54,281 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 314 transitions. Word has length 81 [2023-02-18 18:33:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 18:33:54,282 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 314 transitions. [2023-02-18 18:33:54,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 11 states have internal predecessors, (41), 7 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-18 18:33:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 314 transitions. [2023-02-18 18:33:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-18 18:33:54,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 18:33:54,283 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-18 18:33:54,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-02-18 18:33:54,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:33:54,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 18:33:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 18:33:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 3 times [2023-02-18 18:33:54,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 18:33:54,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358548294] [2023-02-18 18:33:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:33:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 18:33:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 18:33:54,490 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 18:33:54,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-02-18 18:33:54,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:33:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:33:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 18:33:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:33:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 98 proven. 48 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-18 18:33:56,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 18:34:20,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 18:34:20,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358548294] [2023-02-18 18:34:20,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358548294] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 18:34:20,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429464469] [2023-02-18 18:34:20,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 18:34:20,552 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 18:34:20,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 18:34:20,553 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 18:34:20,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-02-18 18:34:20,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 18:34:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 18:34:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 18:34:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 18:34:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 18:34:22,947 INFO L328 TraceCheckSpWp]: Computing backward predicates...