./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/egcd3-ll_unwindbound100.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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:42:35,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:42:35,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:42:35,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:42:35,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:42:35,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:42:35,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:42:35,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:42:35,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:42:35,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:42:35,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:42:35,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:42:35,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:42:35,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:42:35,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:42:35,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:42:35,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:42:35,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:42:35,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:42:35,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:42:35,156 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:42:35,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:42:35,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:42:35,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:42:35,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:42:35,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:42:35,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:42:35,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:42:35,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:42:35,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:42:35,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:42:35,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:42:35,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:42:35,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:42:35,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:42:35,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:42:35,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:42:35,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:42:35,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:42:35,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:42:35,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:42:35,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:42:35,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:42:35,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:42:35,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:42:35,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:42:35,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:42:35,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:42:35,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:42:35,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:42:35,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:42:35,211 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:42:35,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:42:35,212 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:42:35,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:42:35,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:42:35,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:42:35,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:42:35,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:42:35,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:42:35,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:42:35,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:42:35,214 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:42:35,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:42:35,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:42:35,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:42:35,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:42:35,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:42:35,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:42:35,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:42:35,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:42:35,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:42:35,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:42:35,216 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:42:35,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:42:35,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:42:35,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2022-07-12 04:42:35,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:42:35,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:42:35,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:42:35,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:42:35,469 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:42:35,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-07-12 04:42:35,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82495a00/3f117984e5384a9b822aea2f671a7659/FLAG1a2963d9d [2022-07-12 04:42:35,939 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:42:35,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-07-12 04:42:35,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82495a00/3f117984e5384a9b822aea2f671a7659/FLAG1a2963d9d [2022-07-12 04:42:36,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82495a00/3f117984e5384a9b822aea2f671a7659 [2022-07-12 04:42:36,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:42:36,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:42:36,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:42:36,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:42:36,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:42:36,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2542eaa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36, skipping insertion in model container [2022-07-12 04:42:36,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:42:36,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:42:36,556 WARN L230 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/egcd3-ll_unwindbound100.c[490,503] [2022-07-12 04:42:36,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:42:36,609 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:42:36,622 WARN L230 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/egcd3-ll_unwindbound100.c[490,503] [2022-07-12 04:42:36,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:42:36,659 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:42:36,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36 WrapperNode [2022-07-12 04:42:36,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:42:36,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:42:36,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:42:36,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:42:36,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,696 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2022-07-12 04:42:36,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:42:36,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:42:36,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:42:36,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:42:36,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:42:36,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:42:36,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:42:36,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:42:36,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (1/1) ... [2022-07-12 04:42:36,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:42:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:36,768 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) [2022-07-12 04:42:36,770 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 [2022-07-12 04:42:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:42:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 04:42:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 04:42:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:42:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:42:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:42:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:42:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:42:36,849 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:42:36,850 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:42:36,970 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:42:36,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:42:36,976 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 04:42:36,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:42:36 BoogieIcfgContainer [2022-07-12 04:42:36,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:42:36,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:42:36,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:42:36,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:42:36,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:42:36" (1/3) ... [2022-07-12 04:42:36,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf46d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:42:36, skipping insertion in model container [2022-07-12 04:42:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:42:36" (2/3) ... [2022-07-12 04:42:36,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5acf46d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:42:36, skipping insertion in model container [2022-07-12 04:42:37,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:42:36" (3/3) ... [2022-07-12 04:42:37,003 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2022-07-12 04:42:37,020 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:42:37,031 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:42:37,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:42:37,113 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@16609a70, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c7b8f57 [2022-07-12 04:42:37,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:42:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:42:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:42:37,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:37,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:37,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2022-07-12 04:42:37,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:37,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032628610] [2022-07-12 04:42:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:37,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 04:42:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:37,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-12 04:42:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032628610] [2022-07-12 04:42:37,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032628610] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:37,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:37,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:42:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714626378] [2022-07-12 04:42:37,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:37,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:42:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:42:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:42:37,376 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:42:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:37,411 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-07-12 04:42:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:42:37,413 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-12 04:42:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:37,421 INFO L225 Difference]: With dead ends: 67 [2022-07-12 04:42:37,421 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 04:42:37,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:42:37,429 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-07-12 04:42:37,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 04:42:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-12 04:42:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-07-12 04:42:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-07-12 04:42:37,466 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2022-07-12 04:42:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:37,466 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-07-12 04:42:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:42:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-07-12 04:42:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:42:37,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:37,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:37,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:42:37,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2022-07-12 04:42:37,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:37,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952654681] [2022-07-12 04:42:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:37,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:37,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:37,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844861069] [2022-07-12 04:42:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:37,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:37,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:37,490 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) [2022-07-12 04:42:37,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:42:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 04:42:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:37,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952654681] [2022-07-12 04:42:37,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844861069] [2022-07-12 04:42:37,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844861069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:37,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:37,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:42:37,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911810260] [2022-07-12 04:42:37,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:37,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:42:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:37,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:42:37,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:42:37,666 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 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) [2022-07-12 04:42:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:37,689 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-07-12 04:42:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:42:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 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 19 [2022-07-12 04:42:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:37,691 INFO L225 Difference]: With dead ends: 40 [2022-07-12 04:42:37,691 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 04:42:37,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:42:37,693 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:37,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 04:42:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 04:42:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-07-12 04:42:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-12 04:42:37,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2022-07-12 04:42:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:37,709 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-12 04:42:37,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 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) [2022-07-12 04:42:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-12 04:42:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 04:42:37,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:37,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:37,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:37,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:37,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2022-07-12 04:42:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:37,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310836481] [2022-07-12 04:42:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:37,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:37,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388305345] [2022-07-12 04:42:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:37,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:37,953 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) [2022-07-12 04:42:37,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:42:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:42:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:38,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310836481] [2022-07-12 04:42:38,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:38,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388305345] [2022-07-12 04:42:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388305345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:38,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 04:42:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147012137] [2022-07-12 04:42:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:42:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:42:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:38,037 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:42:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:38,128 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-07-12 04:42:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:42:38,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-12 04:42:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:38,132 INFO L225 Difference]: With dead ends: 53 [2022-07-12 04:42:38,133 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 04:42:38,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:42:38,135 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:38,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 128 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 04:42:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2022-07-12 04:42:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-07-12 04:42:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-07-12 04:42:38,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2022-07-12 04:42:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:38,148 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-07-12 04:42:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:42:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-07-12 04:42:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:42:38,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:38,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:38,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 04:42:38,363 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 [2022-07-12 04:42:38,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2022-07-12 04:42:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:38,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189515740] [2022-07-12 04:42:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:38,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:38,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104288875] [2022-07-12 04:42:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:38,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:38,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:38,385 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) [2022-07-12 04:42:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:42:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:42:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:38,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189515740] [2022-07-12 04:42:38,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104288875] [2022-07-12 04:42:38,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104288875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:38,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:38,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:42:38,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484188666] [2022-07-12 04:42:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:38,482 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 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) [2022-07-12 04:42:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:38,504 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-07-12 04:42:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:42:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 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 25 [2022-07-12 04:42:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:38,505 INFO L225 Difference]: With dead ends: 58 [2022-07-12 04:42:38,505 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 04:42:38,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:38,507 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:38,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 04:42:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 04:42:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2022-07-12 04:42:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-07-12 04:42:38,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2022-07-12 04:42:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:38,514 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-07-12 04:42:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 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) [2022-07-12 04:42:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-07-12 04:42:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:42:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:38,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:38,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:38,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2022-07-12 04:42:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819727560] [2022-07-12 04:42:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:38,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:38,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348254629] [2022-07-12 04:42:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:38,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:38,735 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) [2022-07-12 04:42:38,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:42:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:42:38,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:38,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819727560] [2022-07-12 04:42:38,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348254629] [2022-07-12 04:42:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348254629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:38,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:38,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 04:42:38,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284013939] [2022-07-12 04:42:38,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:42:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:42:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:42:38,970 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:42:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:39,067 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-07-12 04:42:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:42:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-12 04:42:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:39,069 INFO L225 Difference]: With dead ends: 54 [2022-07-12 04:42:39,069 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 04:42:39,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:42:39,070 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:39,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 183 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 04:42:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-12 04:42:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-12 04:42:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-07-12 04:42:39,079 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2022-07-12 04:42:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:39,080 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-07-12 04:42:39,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:42:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-07-12 04:42:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:42:39,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:39,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:39,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:39,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2022-07-12 04:42:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069693930] [2022-07-12 04:42:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:39,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:39,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798157026] [2022-07-12 04:42:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:39,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:39,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:39,310 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) [2022-07-12 04:42:39,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:42:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:42:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069693930] [2022-07-12 04:42:39,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798157026] [2022-07-12 04:42:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798157026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:39,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:39,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-12 04:42:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999978824] [2022-07-12 04:42:39,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:42:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:42:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:42:39,459 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:39,588 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-07-12 04:42:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:42:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-07-12 04:42:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:39,591 INFO L225 Difference]: With dead ends: 147 [2022-07-12 04:42:39,591 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 04:42:39,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:42:39,593 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:39,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 201 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 04:42:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-07-12 04:42:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-12 04:42:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2022-07-12 04:42:39,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2022-07-12 04:42:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:39,620 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2022-07-12 04:42:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2022-07-12 04:42:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:42:39,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:39,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:39,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:39,843 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2022-07-12 04:42:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727427473] [2022-07-12 04:42:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:39,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:39,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129389407] [2022-07-12 04:42:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:39,860 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) [2022-07-12 04:42:39,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:42:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:42:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:39,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:40,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727427473] [2022-07-12 04:42:40,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:40,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129389407] [2022-07-12 04:42:40,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129389407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:40,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:40,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-12 04:42:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753986261] [2022-07-12 04:42:40,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:42:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:42:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:42:40,028 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:42:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:40,229 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-07-12 04:42:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:42:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-07-12 04:42:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:40,231 INFO L225 Difference]: With dead ends: 183 [2022-07-12 04:42:40,232 INFO L226 Difference]: Without dead ends: 171 [2022-07-12 04:42:40,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:42:40,233 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 113 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:40,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 277 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-12 04:42:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-07-12 04:42:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:42:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2022-07-12 04:42:40,256 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2022-07-12 04:42:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:40,257 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2022-07-12 04:42:40,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 04:42:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2022-07-12 04:42:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 04:42:40,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:40,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:40,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:40,472 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2022-07-12 04:42:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295092255] [2022-07-12 04:42:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:40,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:40,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79793123] [2022-07-12 04:42:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:40,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:40,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:40,485 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) [2022-07-12 04:42:40,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:42:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 04:42:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:40,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:40,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295092255] [2022-07-12 04:42:40,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79793123] [2022-07-12 04:42:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79793123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:40,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:40,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 04:42:40,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077970361] [2022-07-12 04:42:40,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:40,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:42:40,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:42:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:42:40,732 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 04:42:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:40,945 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2022-07-12 04:42:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:42:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-12 04:42:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:40,948 INFO L225 Difference]: With dead ends: 153 [2022-07-12 04:42:40,948 INFO L226 Difference]: Without dead ends: 151 [2022-07-12 04:42:40,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:42:40,949 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 211 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-12 04:42:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2022-07-12 04:42:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:42:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2022-07-12 04:42:40,984 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2022-07-12 04:42:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:40,985 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2022-07-12 04:42:40,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 04:42:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2022-07-12 04:42:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:42:40,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:40,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:41,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:41,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2022-07-12 04:42:41,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:41,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019879684] [2022-07-12 04:42:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:41,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:41,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:41,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660262016] [2022-07-12 04:42:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:41,232 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) [2022-07-12 04:42:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:42:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 04:42:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:42:41,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:41,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019879684] [2022-07-12 04:42:41,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:41,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660262016] [2022-07-12 04:42:41,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660262016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:41,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:41,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-07-12 04:42:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112319410] [2022-07-12 04:42:41,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:42:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:42:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:42:41,538 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:41,844 INFO L93 Difference]: Finished difference Result 183 states and 251 transitions. [2022-07-12 04:42:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:42:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-12 04:42:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:41,846 INFO L225 Difference]: With dead ends: 183 [2022-07-12 04:42:41,846 INFO L226 Difference]: Without dead ends: 181 [2022-07-12 04:42:41,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:42:41,847 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:41,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 317 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:42:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-12 04:42:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2022-07-12 04:42:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-12 04:42:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2022-07-12 04:42:41,866 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2022-07-12 04:42:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:41,867 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2022-07-12 04:42:41,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2022-07-12 04:42:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 04:42:41,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:41,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:41,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:42,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-12 04:42:42,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:42,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2022-07-12 04:42:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:42,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342602666] [2022-07-12 04:42:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:42,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41808874] [2022-07-12 04:42:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:42,101 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) [2022-07-12 04:42:42,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:42:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:42,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:42:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:42,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:42,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342602666] [2022-07-12 04:42:42,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41808874] [2022-07-12 04:42:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41808874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:42,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:42:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257855831] [2022-07-12 04:42:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:42,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:42:42,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:42:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:42,195 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 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) [2022-07-12 04:42:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:42,227 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-07-12 04:42:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:42:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 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 32 [2022-07-12 04:42:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:42,229 INFO L225 Difference]: With dead ends: 237 [2022-07-12 04:42:42,229 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 04:42:42,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:42,230 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:42,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 04:42:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-07-12 04:42:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-12 04:42:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2022-07-12 04:42:42,245 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2022-07-12 04:42:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:42,246 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2022-07-12 04:42:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 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) [2022-07-12 04:42:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2022-07-12 04:42:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 04:42:42,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:42,247 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:42,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:42,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 04:42:42,466 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2022-07-12 04:42:42,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:42,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663345202] [2022-07-12 04:42:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:42,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400397141] [2022-07-12 04:42:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:42,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:42,477 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) [2022-07-12 04:42:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:42:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:42:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 04:42:42,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663345202] [2022-07-12 04:42:42,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400397141] [2022-07-12 04:42:42,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400397141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:42,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:42,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:42:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78600205] [2022-07-12 04:42:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:42,583 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:42,648 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2022-07-12 04:42:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:42:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-12 04:42:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:42,651 INFO L225 Difference]: With dead ends: 235 [2022-07-12 04:42:42,652 INFO L226 Difference]: Without dead ends: 233 [2022-07-12 04:42:42,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:42,653 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:42,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-12 04:42:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2022-07-12 04:42:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-07-12 04:42:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2022-07-12 04:42:42,684 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2022-07-12 04:42:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2022-07-12 04:42:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2022-07-12 04:42:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 04:42:42,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:42,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:42,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:42,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-12 04:42:42,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2022-07-12 04:42:42,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:42,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736078116] [2022-07-12 04:42:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:42,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:42,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748962960] [2022-07-12 04:42:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:42,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:42,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:42,920 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) [2022-07-12 04:42:42,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:42:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 04:42:42,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:43,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:43,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:43,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736078116] [2022-07-12 04:42:43,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:43,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748962960] [2022-07-12 04:42:43,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748962960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:43,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:43,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-12 04:42:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136386151] [2022-07-12 04:42:43,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:43,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:42:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:42:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:42:43,219 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 04:42:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:44,467 INFO L93 Difference]: Finished difference Result 388 states and 574 transitions. [2022-07-12 04:42:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:42:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-12 04:42:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:44,469 INFO L225 Difference]: With dead ends: 388 [2022-07-12 04:42:44,469 INFO L226 Difference]: Without dead ends: 386 [2022-07-12 04:42:44,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:42:44,470 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 168 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:44,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 292 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 04:42:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-12 04:42:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 373. [2022-07-12 04:42:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 265 states have (on average 1.4264150943396225) internal successors, (378), 266 states have internal predecessors, (378), 91 states have call successors, (91), 16 states have call predecessors, (91), 16 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-07-12 04:42:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 559 transitions. [2022-07-12 04:42:44,516 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 559 transitions. Word has length 37 [2022-07-12 04:42:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:44,516 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 559 transitions. [2022-07-12 04:42:44,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 04:42:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 559 transitions. [2022-07-12 04:42:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:42:44,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:44,518 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:44,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:44,743 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,SelfDestructingSolverStorable11 [2022-07-12 04:42:44,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2022-07-12 04:42:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:44,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638354499] [2022-07-12 04:42:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:44,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169487969] [2022-07-12 04:42:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:44,758 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) [2022-07-12 04:42:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:42:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:44,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:42:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 04:42:44,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:44,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:44,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638354499] [2022-07-12 04:42:44,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:44,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169487969] [2022-07-12 04:42:44,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169487969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:44,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:44,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:42:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598678472] [2022-07-12 04:42:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:44,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:44,848 INFO L87 Difference]: Start difference. First operand 373 states and 559 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-07-12 04:42:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:44,931 INFO L93 Difference]: Finished difference Result 562 states and 883 transitions. [2022-07-12 04:42:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:42:44,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2022-07-12 04:42:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:44,935 INFO L225 Difference]: With dead ends: 562 [2022-07-12 04:42:44,935 INFO L226 Difference]: Without dead ends: 560 [2022-07-12 04:42:44,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:44,936 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:44,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-12 04:42:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 491. [2022-07-12 04:42:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 306 states have (on average 1.4281045751633987) internal successors, (437), 326 states have internal predecessors, (437), 167 states have call successors, (167), 17 states have call predecessors, (167), 17 states have return successors, (166), 147 states have call predecessors, (166), 166 states have call successors, (166) [2022-07-12 04:42:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 770 transitions. [2022-07-12 04:42:45,006 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 770 transitions. Word has length 40 [2022-07-12 04:42:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:45,006 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 770 transitions. [2022-07-12 04:42:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-07-12 04:42:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 770 transitions. [2022-07-12 04:42:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 04:42:45,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:45,008 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:45,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 04:42:45,223 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,SelfDestructingSolverStorable12 [2022-07-12 04:42:45,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2022-07-12 04:42:45,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:45,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116111162] [2022-07-12 04:42:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:45,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917170107] [2022-07-12 04:42:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:45,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:45,248 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) [2022-07-12 04:42:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:42:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:45,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:42:45,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:42:45,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:42:45,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116111162] [2022-07-12 04:42:45,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:45,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917170107] [2022-07-12 04:42:45,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917170107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:45,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:45,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-12 04:42:45,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937248368] [2022-07-12 04:42:45,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:45,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:42:45,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:42:45,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:42:45,394 INFO L87 Difference]: Start difference. First operand 491 states and 770 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:45,656 INFO L93 Difference]: Finished difference Result 1123 states and 1717 transitions. [2022-07-12 04:42:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:42:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-07-12 04:42:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:45,663 INFO L225 Difference]: With dead ends: 1123 [2022-07-12 04:42:45,663 INFO L226 Difference]: Without dead ends: 766 [2022-07-12 04:42:45,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:42:45,667 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 131 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:45,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 292 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-07-12 04:42:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 732. [2022-07-12 04:42:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 470 states have (on average 1.3638297872340426) internal successors, (641), 494 states have internal predecessors, (641), 222 states have call successors, (222), 39 states have call predecessors, (222), 39 states have return successors, (218), 198 states have call predecessors, (218), 218 states have call successors, (218) [2022-07-12 04:42:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1081 transitions. [2022-07-12 04:42:45,766 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1081 transitions. Word has length 38 [2022-07-12 04:42:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:45,767 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 1081 transitions. [2022-07-12 04:42:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1081 transitions. [2022-07-12 04:42:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 04:42:45,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:45,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:45,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:45,991 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,SelfDestructingSolverStorable13 [2022-07-12 04:42:45,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2022-07-12 04:42:45,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:45,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475079673] [2022-07-12 04:42:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:45,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:46,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419041083] [2022-07-12 04:42:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:46,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:46,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:46,001 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) [2022-07-12 04:42:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:42:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:42:46,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:46,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:42:46,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475079673] [2022-07-12 04:42:46,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419041083] [2022-07-12 04:42:46,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419041083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:46,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:46,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-12 04:42:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962943892] [2022-07-12 04:42:46,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:46,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:42:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:42:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:42:46,178 INFO L87 Difference]: Start difference. First operand 732 states and 1081 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:46,551 INFO L93 Difference]: Finished difference Result 1593 states and 2375 transitions. [2022-07-12 04:42:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 04:42:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-12 04:42:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:46,557 INFO L225 Difference]: With dead ends: 1593 [2022-07-12 04:42:46,557 INFO L226 Difference]: Without dead ends: 1115 [2022-07-12 04:42:46,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:42:46,561 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 286 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:46,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 390 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:42:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-07-12 04:42:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1068. [2022-07-12 04:42:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 696 states have (on average 1.3117816091954022) internal successors, (913), 729 states have internal predecessors, (913), 316 states have call successors, (316), 55 states have call predecessors, (316), 55 states have return successors, (310), 283 states have call predecessors, (310), 310 states have call successors, (310) [2022-07-12 04:42:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1539 transitions. [2022-07-12 04:42:46,692 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1539 transitions. Word has length 39 [2022-07-12 04:42:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:46,692 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1539 transitions. [2022-07-12 04:42:46,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 04:42:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1539 transitions. [2022-07-12 04:42:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 04:42:46,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:46,693 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:46,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:46,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:46,907 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash -827121215, now seen corresponding path program 2 times [2022-07-12 04:42:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:46,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419420171] [2022-07-12 04:42:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:46,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:46,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:46,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87523460] [2022-07-12 04:42:46,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:42:46,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:46,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:46,918 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) [2022-07-12 04:42:46,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:42:46,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:42:46,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:42:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:42:46,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:42:46,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:46,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:46,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419420171] [2022-07-12 04:42:46,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:46,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87523460] [2022-07-12 04:42:46,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87523460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:46,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:46,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:42:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277513270] [2022-07-12 04:42:46,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:46,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:46,986 INFO L87 Difference]: Start difference. First operand 1068 states and 1539 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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) [2022-07-12 04:42:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:47,186 INFO L93 Difference]: Finished difference Result 1696 states and 2535 transitions. [2022-07-12 04:42:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:42:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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 40 [2022-07-12 04:42:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:47,193 INFO L225 Difference]: With dead ends: 1696 [2022-07-12 04:42:47,193 INFO L226 Difference]: Without dead ends: 1230 [2022-07-12 04:42:47,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:42:47,195 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:47,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:42:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-07-12 04:42:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 991. [2022-07-12 04:42:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 659 states have (on average 1.3019726858877088) internal successors, (858), 689 states have internal predecessors, (858), 276 states have call successors, (276), 55 states have call predecessors, (276), 55 states have return successors, (270), 246 states have call predecessors, (270), 270 states have call successors, (270) [2022-07-12 04:42:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1404 transitions. [2022-07-12 04:42:47,318 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1404 transitions. Word has length 40 [2022-07-12 04:42:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1404 transitions. [2022-07-12 04:42:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 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) [2022-07-12 04:42:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1404 transitions. [2022-07-12 04:42:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 04:42:47,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:47,319 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:47,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:47,535 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,SelfDestructingSolverStorable15 [2022-07-12 04:42:47,535 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2022-07-12 04:42:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570773464] [2022-07-12 04:42:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:47,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:47,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406124063] [2022-07-12 04:42:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:47,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:47,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:47,549 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) [2022-07-12 04:42:47,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:42:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 04:42:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:42:48,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:42:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570773464] [2022-07-12 04:42:48,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:48,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406124063] [2022-07-12 04:42:48,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406124063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:48,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:48,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-07-12 04:42:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641967259] [2022-07-12 04:42:48,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:42:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:42:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:42:48,476 INFO L87 Difference]: Start difference. First operand 991 states and 1404 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 04:42:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:55,452 INFO L93 Difference]: Finished difference Result 1352 states and 1914 transitions. [2022-07-12 04:42:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 04:42:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 54 [2022-07-12 04:42:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:55,458 INFO L225 Difference]: With dead ends: 1352 [2022-07-12 04:42:55,458 INFO L226 Difference]: Without dead ends: 1344 [2022-07-12 04:42:55,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 04:42:55,460 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 220 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 595 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-12 04:42:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-07-12 04:42:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1194. [2022-07-12 04:42:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 812 states have (on average 1.293103448275862) internal successors, (1050), 837 states have internal predecessors, (1050), 310 states have call successors, (310), 71 states have call predecessors, (310), 71 states have return successors, (306), 285 states have call predecessors, (306), 306 states have call successors, (306) [2022-07-12 04:42:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1666 transitions. [2022-07-12 04:42:55,673 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1666 transitions. Word has length 54 [2022-07-12 04:42:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:55,673 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1666 transitions. [2022-07-12 04:42:55,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-12 04:42:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1666 transitions. [2022-07-12 04:42:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 04:42:55,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:55,674 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:55,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:55,883 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,SelfDestructingSolverStorable16 [2022-07-12 04:42:55,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2022-07-12 04:42:55,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027189655] [2022-07-12 04:42:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:55,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103175566] [2022-07-12 04:42:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:55,906 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) [2022-07-12 04:42:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:42:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:42:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 04:42:56,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 04:42:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027189655] [2022-07-12 04:42:56,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103175566] [2022-07-12 04:42:56,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103175566] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:42:56,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:42:56,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-12 04:42:56,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168799789] [2022-07-12 04:42:56,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:42:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:42:56,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:56,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:42:56,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:42:56,223 INFO L87 Difference]: Start difference. First operand 1194 states and 1666 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:42:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:56,969 INFO L93 Difference]: Finished difference Result 2551 states and 3669 transitions. [2022-07-12 04:42:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 04:42:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2022-07-12 04:42:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:56,981 INFO L225 Difference]: With dead ends: 2551 [2022-07-12 04:42:56,981 INFO L226 Difference]: Without dead ends: 2529 [2022-07-12 04:42:56,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:42:56,982 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 381 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:56,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 476 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:42:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-07-12 04:42:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2397. [2022-07-12 04:42:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1640 states have (on average 1.3073170731707318) internal successors, (2144), 1710 states have internal predecessors, (2144), 641 states have call successors, (641), 115 states have call predecessors, (641), 115 states have return successors, (634), 571 states have call predecessors, (634), 634 states have call successors, (634) [2022-07-12 04:42:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3419 transitions. [2022-07-12 04:42:57,426 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3419 transitions. Word has length 60 [2022-07-12 04:42:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:57,427 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3419 transitions. [2022-07-12 04:42:57,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:42:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3419 transitions. [2022-07-12 04:42:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 04:42:57,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:57,428 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:57,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 04:42:57,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:57,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2022-07-12 04:42:57,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:57,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738622689] [2022-07-12 04:42:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:57,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:57,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388117538] [2022-07-12 04:42:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:57,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:57,658 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) [2022-07-12 04:42:57,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:42:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:42:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-07-12 04:42:57,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:42:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-12 04:42:57,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:57,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738622689] [2022-07-12 04:42:57,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:57,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388117538] [2022-07-12 04:42:57,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388117538] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:42:57,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:42:57,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-07-12 04:42:57,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510776338] [2022-07-12 04:42:57,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:57,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:57,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:42:57,932 INFO L87 Difference]: Start difference. First operand 2397 states and 3419 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 04:42:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:58,249 INFO L93 Difference]: Finished difference Result 2458 states and 3479 transitions. [2022-07-12 04:42:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:42:58,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2022-07-12 04:42:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:58,259 INFO L225 Difference]: With dead ends: 2458 [2022-07-12 04:42:58,259 INFO L226 Difference]: Without dead ends: 2456 [2022-07-12 04:42:58,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:42:58,261 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:58,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 131 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-07-12 04:42:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2433. [2022-07-12 04:42:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1667 states have (on average 1.3011397720455908) internal successors, (2169), 1737 states have internal predecessors, (2169), 641 states have call successors, (641), 124 states have call predecessors, (641), 124 states have return successors, (634), 571 states have call predecessors, (634), 634 states have call successors, (634) [2022-07-12 04:42:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3444 transitions. [2022-07-12 04:42:58,739 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3444 transitions. Word has length 63 [2022-07-12 04:42:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:58,739 INFO L495 AbstractCegarLoop]: Abstraction has 2433 states and 3444 transitions. [2022-07-12 04:42:58,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 04:42:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3444 transitions. [2022-07-12 04:42:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 04:42:58,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:58,741 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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, 1, 1, 1, 1] [2022-07-12 04:42:58,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:42:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:58,955 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:42:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:42:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 1 times [2022-07-12 04:42:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:42:58,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854004276] [2022-07-12 04:42:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:42:58,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:42:58,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904281025] [2022-07-12 04:42:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:42:58,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:42:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:42:58,968 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) [2022-07-12 04:42:58,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:42:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:42:59,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:42:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:42:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:42:59,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:42:59,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:42:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854004276] [2022-07-12 04:42:59,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:42:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904281025] [2022-07-12 04:42:59,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904281025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:42:59,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:42:59,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:42:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958661636] [2022-07-12 04:42:59,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:42:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:42:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:42:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:42:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:42:59,042 INFO L87 Difference]: Start difference. First operand 2433 states and 3444 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:42:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:42:59,404 INFO L93 Difference]: Finished difference Result 4403 states and 6223 transitions. [2022-07-12 04:42:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:42:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2022-07-12 04:42:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:42:59,416 INFO L225 Difference]: With dead ends: 4403 [2022-07-12 04:42:59,416 INFO L226 Difference]: Without dead ends: 2613 [2022-07-12 04:42:59,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:42:59,422 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:42:59,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 134 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:42:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2022-07-12 04:42:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2417. [2022-07-12 04:42:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 1725 states have (on average 1.3014492753623188) internal successors, (2245), 1757 states have internal predecessors, (2245), 569 states have call successors, (569), 122 states have call predecessors, (569), 122 states have return successors, (562), 537 states have call predecessors, (562), 562 states have call successors, (562) [2022-07-12 04:42:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3376 transitions. [2022-07-12 04:42:59,841 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3376 transitions. Word has length 69 [2022-07-12 04:42:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:42:59,841 INFO L495 AbstractCegarLoop]: Abstraction has 2417 states and 3376 transitions. [2022-07-12 04:42:59,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-12 04:42:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3376 transitions. [2022-07-12 04:42:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-12 04:42:59,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:42:59,847 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:42:59,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:00,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:00,059 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 2 times [2022-07-12 04:43:00,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:00,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834863459] [2022-07-12 04:43:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:00,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660779377] [2022-07-12 04:43:00,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:43:00,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:00,069 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:43:00,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:43:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:43:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:43:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-12 04:43:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 04:43:00,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 04:43:01,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834863459] [2022-07-12 04:43:01,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660779377] [2022-07-12 04:43:01,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660779377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:01,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:01,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-07-12 04:43:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126144438] [2022-07-12 04:43:01,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:01,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:43:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:43:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:43:01,382 INFO L87 Difference]: Start difference. First operand 2417 states and 3376 transitions. Second operand has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-12 04:43:07,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:09,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:10,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:14,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:16,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:18,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:20,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:22,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:23,933 INFO L93 Difference]: Finished difference Result 3015 states and 4155 transitions. [2022-07-12 04:43:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 04:43:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 71 [2022-07-12 04:43:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:23,944 INFO L225 Difference]: With dead ends: 3015 [2022-07-12 04:43:23,945 INFO L226 Difference]: Without dead ends: 3013 [2022-07-12 04:43:23,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 04:43:23,947 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 197 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 210 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:23,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 694 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1100 Invalid, 5 Unknown, 0 Unchecked, 21.4s Time] [2022-07-12 04:43:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2022-07-12 04:43:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2909. [2022-07-12 04:43:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2124 states have (on average 1.3074387947269304) internal successors, (2777), 2161 states have internal predecessors, (2777), 627 states have call successors, (627), 157 states have call predecessors, (627), 157 states have return successors, (620), 590 states have call predecessors, (620), 620 states have call successors, (620) [2022-07-12 04:43:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4024 transitions. [2022-07-12 04:43:24,405 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4024 transitions. Word has length 71 [2022-07-12 04:43:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:24,406 INFO L495 AbstractCegarLoop]: Abstraction has 2909 states and 4024 transitions. [2022-07-12 04:43:24,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 10 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-12 04:43:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4024 transitions. [2022-07-12 04:43:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 04:43:24,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:24,407 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:43:24,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 04:43:24,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 04:43:24,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:24,624 INFO L85 PathProgramCache]: Analyzing trace with hash 940337767, now seen corresponding path program 1 times [2022-07-12 04:43:24,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:24,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322436979] [2022-07-12 04:43:24,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:24,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:24,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882575466] [2022-07-12 04:43:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:24,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:24,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:24,638 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:43:24,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:43:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 04:43:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-12 04:43:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:25,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322436979] [2022-07-12 04:43:25,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882575466] [2022-07-12 04:43:25,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882575466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:43:25,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:43:25,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-12 04:43:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125432258] [2022-07-12 04:43:25,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:43:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:43:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:43:25,574 INFO L87 Difference]: Start difference. First operand 2909 states and 4024 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-12 04:43:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:43:26,322 INFO L93 Difference]: Finished difference Result 3000 states and 4152 transitions. [2022-07-12 04:43:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:43:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 85 [2022-07-12 04:43:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:43:26,332 INFO L225 Difference]: With dead ends: 3000 [2022-07-12 04:43:26,332 INFO L226 Difference]: Without dead ends: 2998 [2022-07-12 04:43:26,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-07-12 04:43:26,334 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:43:26,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 295 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:43:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2022-07-12 04:43:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2989. [2022-07-12 04:43:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2168 states have (on average 1.305350553505535) internal successors, (2830), 2206 states have internal predecessors, (2830), 655 states have call successors, (655), 165 states have call predecessors, (655), 165 states have return successors, (648), 617 states have call predecessors, (648), 648 states have call successors, (648) [2022-07-12 04:43:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4133 transitions. [2022-07-12 04:43:26,739 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4133 transitions. Word has length 85 [2022-07-12 04:43:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:43:26,740 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4133 transitions. [2022-07-12 04:43:26,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-12 04:43:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4133 transitions. [2022-07-12 04:43:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 04:43:26,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:43:26,742 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1] [2022-07-12 04:43:26,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 04:43:26,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 04:43:26,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:43:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:43:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2022-07-12 04:43:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:43:26,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163953536] [2022-07-12 04:43:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:43:26,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:43:26,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346587215] [2022-07-12 04:43:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:43:26,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:43:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:43:26,965 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:43:26,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 04:43:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:43:27,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 04:43:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:43:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 39 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-12 04:43:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:43:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-12 04:43:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:43:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163953536] [2022-07-12 04:43:34,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:43:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346587215] [2022-07-12 04:43:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346587215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:43:34,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:43:34,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-07-12 04:43:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253433273] [2022-07-12 04:43:34,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:43:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:43:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:43:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:43:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:43:34,170 INFO L87 Difference]: Start difference. First operand 2989 states and 4133 transitions. Second operand has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:43:44,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:43:48,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:02,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:08,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:10,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:16,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:23,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:26,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:29,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:31,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:44:42,047 INFO L93 Difference]: Finished difference Result 3793 states and 5239 transitions. [2022-07-12 04:44:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 04:44:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 84 [2022-07-12 04:44:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:44:42,059 INFO L225 Difference]: With dead ends: 3793 [2022-07-12 04:44:42,059 INFO L226 Difference]: Without dead ends: 3756 [2022-07-12 04:44:42,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3631 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=1724, Invalid=8988, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 04:44:42,063 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 379 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 463 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:44:42,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1029 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 2152 Invalid, 9 Unknown, 0 Unchecked, 32.8s Time] [2022-07-12 04:44:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2022-07-12 04:44:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3437. [2022-07-12 04:44:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 2453 states have (on average 1.314309009376274) internal successors, (3224), 2499 states have internal predecessors, (3224), 799 states have call successors, (799), 184 states have call predecessors, (799), 184 states have return successors, (792), 753 states have call predecessors, (792), 792 states have call successors, (792) [2022-07-12 04:44:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 4815 transitions. [2022-07-12 04:44:42,810 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 4815 transitions. Word has length 84 [2022-07-12 04:44:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:44:42,810 INFO L495 AbstractCegarLoop]: Abstraction has 3437 states and 4815 transitions. [2022-07-12 04:44:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 04:44:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 4815 transitions. [2022-07-12 04:44:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-12 04:44:42,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:44:42,812 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:44:42,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 04:44:43,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:44:43,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:44:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:44:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash 403460013, now seen corresponding path program 3 times [2022-07-12 04:44:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:44:43,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996773649] [2022-07-12 04:44:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:44:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:44:43,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:44:43,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974770713] [2022-07-12 04:44:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:44:43,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:44:43,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:44:43,036 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:44:43,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 04:44:43,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:44:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:44:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-12 04:44:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:44:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-12 04:44:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:44:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 04:44:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:44:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996773649] [2022-07-12 04:44:48,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:44:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974770713] [2022-07-12 04:44:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974770713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:44:48,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:44:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2022-07-12 04:44:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528397701] [2022-07-12 04:44:48,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:44:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 04:44:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:44:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 04:44:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:44:48,285 INFO L87 Difference]: Start difference. First operand 3437 states and 4815 transitions. Second operand has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-12 04:44:52,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:44:59,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:03,651 INFO L93 Difference]: Finished difference Result 3566 states and 4990 transitions. [2022-07-12 04:45:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:45:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 93 [2022-07-12 04:45:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:03,668 INFO L225 Difference]: With dead ends: 3566 [2022-07-12 04:45:03,668 INFO L226 Difference]: Without dead ends: 3550 [2022-07-12 04:45:03,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 04:45:03,670 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 203 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 292 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 494 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 924 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2022-07-12 04:45:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-07-12 04:45:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3353. [2022-07-12 04:45:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 2375 states have (on average 1.3128421052631578) internal successors, (3118), 2414 states have internal predecessors, (3118), 793 states have call successors, (793), 185 states have call predecessors, (793), 184 states have return successors, (792), 753 states have call predecessors, (792), 792 states have call successors, (792) [2022-07-12 04:45:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4703 transitions. [2022-07-12 04:45:04,417 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4703 transitions. Word has length 93 [2022-07-12 04:45:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:04,418 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 4703 transitions. [2022-07-12 04:45:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-12 04:45:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4703 transitions. [2022-07-12 04:45:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-12 04:45:04,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:04,419 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2022-07-12 04:45:04,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:04,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:04,629 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 348816342, now seen corresponding path program 1 times [2022-07-12 04:45:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:04,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536303255] [2022-07-12 04:45:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:04,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883515427] [2022-07-12 04:45:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:04,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:04,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:04,648 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:45:04,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 04:45:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:45:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 04:45:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 04:45:04,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-12 04:45:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536303255] [2022-07-12 04:45:04,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:04,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883515427] [2022-07-12 04:45:04,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883515427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:04,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:04,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-12 04:45:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100225328] [2022-07-12 04:45:04,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:04,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 04:45:04,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 04:45:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:45:05,008 INFO L87 Difference]: Start difference. First operand 3353 states and 4703 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:45:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:07,034 INFO L93 Difference]: Finished difference Result 7695 states and 11291 transitions. [2022-07-12 04:45:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 04:45:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2022-07-12 04:45:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:07,053 INFO L225 Difference]: With dead ends: 7695 [2022-07-12 04:45:07,053 INFO L226 Difference]: Without dead ends: 6443 [2022-07-12 04:45:07,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:45:07,058 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 552 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:07,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 610 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:45:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2022-07-12 04:45:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 6086. [2022-07-12 04:45:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 4079 states have (on average 1.307183133120863) internal successors, (5332), 4086 states have internal predecessors, (5332), 1693 states have call successors, (1693), 314 states have call predecessors, (1693), 313 states have return successors, (1692), 1685 states have call predecessors, (1692), 1692 states have call successors, (1692) [2022-07-12 04:45:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 8717 transitions. [2022-07-12 04:45:08,655 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 8717 transitions. Word has length 94 [2022-07-12 04:45:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:08,655 INFO L495 AbstractCegarLoop]: Abstraction has 6086 states and 8717 transitions. [2022-07-12 04:45:08,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:45:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 8717 transitions. [2022-07-12 04:45:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-12 04:45:08,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:08,657 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 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] [2022-07-12 04:45:08,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:08,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 04:45:08,871 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1461558211, now seen corresponding path program 2 times [2022-07-12 04:45:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:08,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308387258] [2022-07-12 04:45:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:08,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:08,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997130034] [2022-07-12 04:45:08,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:45:08,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:08,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:08,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:45:08,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 04:45:08,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:45:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:45:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 04:45:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-12 04:45:09,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-12 04:45:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308387258] [2022-07-12 04:45:09,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997130034] [2022-07-12 04:45:09,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997130034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:09,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:09,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-12 04:45:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986711996] [2022-07-12 04:45:09,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:09,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:45:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:45:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:45:09,111 INFO L87 Difference]: Start difference. First operand 6086 states and 8717 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:45:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:45:12,324 INFO L93 Difference]: Finished difference Result 10006 states and 14774 transitions. [2022-07-12 04:45:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 04:45:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2022-07-12 04:45:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:45:12,351 INFO L225 Difference]: With dead ends: 10006 [2022-07-12 04:45:12,351 INFO L226 Difference]: Without dead ends: 9321 [2022-07-12 04:45:12,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 04:45:12,356 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 207 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:45:12,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 520 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:45:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2022-07-12 04:45:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6150. [2022-07-12 04:45:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 4143 states have (on average 1.3104030895486363) internal successors, (5429), 4152 states have internal predecessors, (5429), 1693 states have call successors, (1693), 314 states have call predecessors, (1693), 313 states have return successors, (1692), 1683 states have call predecessors, (1692), 1692 states have call successors, (1692) [2022-07-12 04:45:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 8814 transitions. [2022-07-12 04:45:14,061 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 8814 transitions. Word has length 95 [2022-07-12 04:45:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:45:14,061 INFO L495 AbstractCegarLoop]: Abstraction has 6150 states and 8814 transitions. [2022-07-12 04:45:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-12 04:45:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 8814 transitions. [2022-07-12 04:45:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-12 04:45:14,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:45:14,065 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:45:14,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 04:45:14,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 04:45:14,271 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:45:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:45:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash -737280076, now seen corresponding path program 2 times [2022-07-12 04:45:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:45:14,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986583878] [2022-07-12 04:45:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:45:14,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:45:14,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:45:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544249462] [2022-07-12 04:45:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:45:14,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:45:14,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:45:14,285 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:45:14,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 04:45:14,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:45:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:45:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-12 04:45:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:45:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 73 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-12 04:45:15,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:45:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 73 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-12 04:45:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:45:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986583878] [2022-07-12 04:45:16,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:45:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544249462] [2022-07-12 04:45:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544249462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:45:16,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:45:16,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-07-12 04:45:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019510601] [2022-07-12 04:45:16,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:45:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:45:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:45:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:45:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:45:16,986 INFO L87 Difference]: Start difference. First operand 6150 states and 8814 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-12 04:45:22,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:29,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:42,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:44,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:50,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:55,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:57,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:45:59,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:05,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:11,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:13,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:15,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:21,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:25,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:27,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:30,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:32,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:46:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:35,007 INFO L93 Difference]: Finished difference Result 7468 states and 10767 transitions. [2022-07-12 04:46:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 04:46:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 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 104 [2022-07-12 04:46:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:35,026 INFO L225 Difference]: With dead ends: 7468 [2022-07-12 04:46:35,026 INFO L226 Difference]: Without dead ends: 7462 [2022-07-12 04:46:35,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1095, Invalid=4910, Unknown=1, NotChecked=0, Total=6006 [2022-07-12 04:46:35,030 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 295 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 477 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.9s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:35,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1131 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 2709 Invalid, 8 Unknown, 0 Unchecked, 54.9s Time] [2022-07-12 04:46:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2022-07-12 04:46:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 6572. [2022-07-12 04:46:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 4439 states have (on average 1.3113313809416536) internal successors, (5821), 4448 states have internal predecessors, (5821), 1797 states have call successors, (1797), 336 states have call predecessors, (1797), 335 states have return successors, (1796), 1787 states have call predecessors, (1796), 1796 states have call successors, (1796) [2022-07-12 04:46:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 9414 transitions. [2022-07-12 04:46:36,932 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 9414 transitions. Word has length 104 [2022-07-12 04:46:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:36,932 INFO L495 AbstractCegarLoop]: Abstraction has 6572 states and 9414 transitions. [2022-07-12 04:46:36,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-12 04:46:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 9414 transitions. [2022-07-12 04:46:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-12 04:46:36,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:36,935 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-07-12 04:46:36,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:37,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 04:46:37,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241099, now seen corresponding path program 1 times [2022-07-12 04:46:37,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:37,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414255534] [2022-07-12 04:46:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:37,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:37,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:37,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392519180] [2022-07-12 04:46:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:37,164 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:37,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 04:46:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:46:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 04:46:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 04:46:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-12 04:46:37,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414255534] [2022-07-12 04:46:37,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392519180] [2022-07-12 04:46:37,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392519180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:46:37,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:46:37,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-12 04:46:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944449320] [2022-07-12 04:46:37,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 04:46:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 04:46:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-12 04:46:37,619 INFO L87 Difference]: Start difference. First operand 6572 states and 9414 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:46:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:40,366 INFO L93 Difference]: Finished difference Result 11161 states and 16224 transitions. [2022-07-12 04:46:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 04:46:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 106 [2022-07-12 04:46:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:40,387 INFO L225 Difference]: With dead ends: 11161 [2022-07-12 04:46:40,387 INFO L226 Difference]: Without dead ends: 7183 [2022-07-12 04:46:40,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 04:46:40,398 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 643 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:40,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 611 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:46:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7183 states. [2022-07-12 04:46:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7183 to 7002. [2022-07-12 04:46:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7002 states, 4552 states have (on average 1.23396309314587) internal successors, (5617), 4556 states have internal predecessors, (5617), 2071 states have call successors, (2071), 379 states have call predecessors, (2071), 378 states have return successors, (2070), 2066 states have call predecessors, (2070), 2070 states have call successors, (2070) [2022-07-12 04:46:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7002 states to 7002 states and 9758 transitions. [2022-07-12 04:46:42,524 INFO L78 Accepts]: Start accepts. Automaton has 7002 states and 9758 transitions. Word has length 106 [2022-07-12 04:46:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:42,524 INFO L495 AbstractCegarLoop]: Abstraction has 7002 states and 9758 transitions. [2022-07-12 04:46:42,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-07-12 04:46:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7002 states and 9758 transitions. [2022-07-12 04:46:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-12 04:46:42,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:42,528 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 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, 1, 1] [2022-07-12 04:46:42,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 04:46:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 04:46:42,743 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1649322963, now seen corresponding path program 2 times [2022-07-12 04:46:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225240543] [2022-07-12 04:46:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:42,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:42,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575187662] [2022-07-12 04:46:42,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:46:42,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:42,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:42,757 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:42,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 04:46:42,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:46:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 04:46:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-12 04:46:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:46:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-12 04:46:43,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:46:43,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225240543] [2022-07-12 04:46:43,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:46:43,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575187662] [2022-07-12 04:46:43,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575187662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:46:43,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:46:43,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2022-07-12 04:46:43,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427610856] [2022-07-12 04:46:43,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:46:43,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 04:46:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:46:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 04:46:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:46:43,395 INFO L87 Difference]: Start difference. First operand 7002 states and 9758 transitions. Second operand has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-12 04:46:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:46:48,117 INFO L93 Difference]: Finished difference Result 13590 states and 19772 transitions. [2022-07-12 04:46:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 04:46:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 128 [2022-07-12 04:46:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:46:48,152 INFO L225 Difference]: With dead ends: 13590 [2022-07-12 04:46:48,152 INFO L226 Difference]: Without dead ends: 13585 [2022-07-12 04:46:48,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 04:46:48,157 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1220 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:46:48,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 930 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 04:46:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13585 states. [2022-07-12 04:46:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13585 to 13014. [2022-07-12 04:46:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13014 states, 8680 states have (on average 1.3029953917050692) internal successors, (11310), 8766 states have internal predecessors, (11310), 3767 states have call successors, (3767), 567 states have call predecessors, (3767), 566 states have return successors, (3766), 3680 states have call predecessors, (3766), 3766 states have call successors, (3766) [2022-07-12 04:46:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13014 states to 13014 states and 18843 transitions. [2022-07-12 04:46:52,074 INFO L78 Accepts]: Start accepts. Automaton has 13014 states and 18843 transitions. Word has length 128 [2022-07-12 04:46:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:46:52,075 INFO L495 AbstractCegarLoop]: Abstraction has 13014 states and 18843 transitions. [2022-07-12 04:46:52,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.7941176470588234) internal successors, (129), 34 states have internal predecessors, (129), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2022-07-12 04:46:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13014 states and 18843 transitions. [2022-07-12 04:46:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-12 04:46:52,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:46:52,079 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:46:52,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 04:46:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 04:46:52,295 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:46:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:46:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash 524158234, now seen corresponding path program 3 times [2022-07-12 04:46:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:46:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901256908] [2022-07-12 04:46:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:46:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:46:52,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:46:52,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368400616] [2022-07-12 04:46:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:46:52,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:46:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:46:52,314 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:46:52,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 04:46:52,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 04:46:52,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:46:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-12 04:46:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:46:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 116 proven. 64 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-07-12 04:46:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates...