./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.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 5c227f1dec7d604552aae19de1afcc1049837e83568477af6195219b22e2f636 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:07:10,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:07:10,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:07:10,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:07:10,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:07:10,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:07:10,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:07:10,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:07:10,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:07:10,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:07:10,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:07:10,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:07:10,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:07:10,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:07:10,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:07:10,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:07:10,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:07:10,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:07:10,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:07:10,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:07:10,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:07:10,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:07:10,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:07:10,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:07:10,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:07:10,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:07:10,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:07:10,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:07:10,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:07:10,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:07:10,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:07:10,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:07:10,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:07:10,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:07:10,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:07:10,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:07:10,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:07:10,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:07:10,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:07:10,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:07:10,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:07:10,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:07:10,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:07:10,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:07:10,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:07:10,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:07:10,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:07:10,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:07:10,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:07:10,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:07:10,113 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:07:10,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:07:10,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:07:10,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:07:10,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:07:10,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:07:10,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:07:10,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:07:10,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:07:10,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:07:10,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:07:10,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:07:10,117 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:07:10,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:07:10,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:07:10,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c227f1dec7d604552aae19de1afcc1049837e83568477af6195219b22e2f636 [2021-12-28 01:07:10,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:07:10,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:07:10,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:07:10,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:07:10,344 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:07:10,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:07:10,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1057e1b/6874abc8420f46289041f159b9091c9e/FLAGc146f12fe [2021-12-28 01:07:10,733 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:07:10,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:07:10,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1057e1b/6874abc8420f46289041f159b9091c9e/FLAGc146f12fe [2021-12-28 01:07:11,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1057e1b/6874abc8420f46289041f159b9091c9e [2021-12-28 01:07:11,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:07:11,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:07:11,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:07:11,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:07:11,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:07:11,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ef5a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11, skipping insertion in model container [2021-12-28 01:07:11,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:07:11,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:07:11,360 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/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c[11921,11934] [2021-12-28 01:07:11,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:07:11,373 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:07:11,431 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/seq-mthreaded/pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c[11921,11934] [2021-12-28 01:07:11,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:07:11,449 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:07:11,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11 WrapperNode [2021-12-28 01:07:11,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:07:11,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:07:11,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:07:11,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:07:11,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,505 INFO L137 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 402 [2021-12-28 01:07:11,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:07:11,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:07:11,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:07:11,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:07:11,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:07:11,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:07:11,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:07:11,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:07:11,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (1/1) ... [2021-12-28 01:07:11,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:07:11,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:11,582 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) [2021-12-28 01:07:11,603 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 [2021-12-28 01:07:11,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:07:11,612 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2021-12-28 01:07:11,613 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2021-12-28 01:07:11,613 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-28 01:07:11,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-28 01:07:11,613 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2021-12-28 01:07:11,613 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2021-12-28 01:07:11,613 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2021-12-28 01:07:11,613 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2021-12-28 01:07:11,613 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2021-12-28 01:07:11,613 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2021-12-28 01:07:11,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 01:07:11,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 01:07:11,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:07:11,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:07:11,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:07:11,742 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:07:11,744 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:07:12,083 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:07:12,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:07:12,091 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 01:07:12,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:07:12 BoogieIcfgContainer [2021-12-28 01:07:12,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:07:12,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:07:12,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:07:12,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:07:12,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:07:11" (1/3) ... [2021-12-28 01:07:12,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499adb5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:07:12, skipping insertion in model container [2021-12-28 01:07:12,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:07:11" (2/3) ... [2021-12-28 01:07:12,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499adb5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:07:12, skipping insertion in model container [2021-12-28 01:07:12,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:07:12" (3/3) ... [2021-12-28 01:07:12,100 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.2.ufo.UNBOUNDED.pals.c [2021-12-28 01:07:12,104 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:07:12,104 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:07:12,148 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:07:12,153 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:07:12,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:07:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 141 states have (on average 1.5886524822695036) internal successors, (224), 146 states have internal predecessors, (224), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 01:07:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 01:07:12,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:12,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash 535506886, now seen corresponding path program 1 times [2021-12-28 01:07:12,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589397123] [2021-12-28 01:07:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:12,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589397123] [2021-12-28 01:07:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589397123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:12,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327273581] [2021-12-28 01:07:12,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:12,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:12,363 INFO L87 Difference]: Start difference. First operand has 186 states, 141 states have (on average 1.5886524822695036) internal successors, (224), 146 states have internal predecessors, (224), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:07:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:12,453 INFO L93 Difference]: Finished difference Result 373 states and 641 transitions. [2021-12-28 01:07:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-28 01:07:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:12,469 INFO L225 Difference]: With dead ends: 373 [2021-12-28 01:07:12,469 INFO L226 Difference]: Without dead ends: 190 [2021-12-28 01:07:12,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:12,475 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 18 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:12,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 829 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-28 01:07:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-12-28 01:07:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 143 states have (on average 1.5384615384615385) internal successors, (220), 147 states have internal predecessors, (220), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 01:07:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 294 transitions. [2021-12-28 01:07:12,542 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 294 transitions. Word has length 15 [2021-12-28 01:07:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:12,542 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 294 transitions. [2021-12-28 01:07:12,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:07:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 294 transitions. [2021-12-28 01:07:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 01:07:12,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:12,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:07:12,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash -355990154, now seen corresponding path program 1 times [2021-12-28 01:07:12,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161402150] [2021-12-28 01:07:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:12,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161402150] [2021-12-28 01:07:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161402150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805899647] [2021-12-28 01:07:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:12,601 INFO L87 Difference]: Start difference. First operand 188 states and 294 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:07:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:12,650 INFO L93 Difference]: Finished difference Result 389 states and 611 transitions. [2021-12-28 01:07:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-28 01:07:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:12,652 INFO L225 Difference]: With dead ends: 389 [2021-12-28 01:07:12,652 INFO L226 Difference]: Without dead ends: 204 [2021-12-28 01:07:12,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:12,654 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 25 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:12,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 850 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-28 01:07:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2021-12-28 01:07:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 158 states have internal predecessors, (234), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-28 01:07:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 310 transitions. [2021-12-28 01:07:12,666 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 310 transitions. Word has length 16 [2021-12-28 01:07:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:12,666 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 310 transitions. [2021-12-28 01:07:12,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:07:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 310 transitions. [2021-12-28 01:07:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 01:07:12,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,668 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:12,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:07:12,668 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1515048690, now seen corresponding path program 1 times [2021-12-28 01:07:12,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312478743] [2021-12-28 01:07:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:12,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312478743] [2021-12-28 01:07:12,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312478743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:07:12,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875284305] [2021-12-28 01:07:12,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:07:12,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:07:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:12,703 INFO L87 Difference]: Start difference. First operand 201 states and 310 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:07:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:12,720 INFO L93 Difference]: Finished difference Result 421 states and 657 transitions. [2021-12-28 01:07:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:07:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-28 01:07:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:12,722 INFO L225 Difference]: With dead ends: 421 [2021-12-28 01:07:12,722 INFO L226 Difference]: Without dead ends: 230 [2021-12-28 01:07:12,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:07:12,724 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 22 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:12,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 574 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-28 01:07:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 203. [2021-12-28 01:07:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 156 states have (on average 1.5128205128205128) internal successors, (236), 160 states have internal predecessors, (236), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-28 01:07:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 312 transitions. [2021-12-28 01:07:12,740 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 312 transitions. Word has length 24 [2021-12-28 01:07:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:12,740 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 312 transitions. [2021-12-28 01:07:12,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 01:07:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 312 transitions. [2021-12-28 01:07:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 01:07:12,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:12,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:07:12,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,742 INFO L85 PathProgramCache]: Analyzing trace with hash 257838497, now seen corresponding path program 1 times [2021-12-28 01:07:12,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069534781] [2021-12-28 01:07:12,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:12,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069534781] [2021-12-28 01:07:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069534781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:12,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623687880] [2021-12-28 01:07:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:12,805 INFO L87 Difference]: Start difference. First operand 203 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:12,844 INFO L93 Difference]: Finished difference Result 503 states and 792 transitions. [2021-12-28 01:07:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-12-28 01:07:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:12,850 INFO L225 Difference]: With dead ends: 503 [2021-12-28 01:07:12,851 INFO L226 Difference]: Without dead ends: 316 [2021-12-28 01:07:12,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:12,853 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 128 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:12,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 1214 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-28 01:07:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 207. [2021-12-28 01:07:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 159 states have (on average 1.5031446540880504) internal successors, (239), 163 states have internal predecessors, (239), 38 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) [2021-12-28 01:07:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 316 transitions. [2021-12-28 01:07:12,864 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 316 transitions. Word has length 32 [2021-12-28 01:07:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:12,865 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 316 transitions. [2021-12-28 01:07:12,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 316 transitions. [2021-12-28 01:07:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 01:07:12,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:12,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:12,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:07:12,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash -559699066, now seen corresponding path program 1 times [2021-12-28 01:07:12,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884092887] [2021-12-28 01:07:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:12,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 01:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:12,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:12,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884092887] [2021-12-28 01:07:12,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884092887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:12,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:12,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:07:12,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000865371] [2021-12-28 01:07:12,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:07:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:07:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:12,956 INFO L87 Difference]: Start difference. First operand 207 states and 316 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 01:07:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:13,041 INFO L93 Difference]: Finished difference Result 359 states and 554 transitions. [2021-12-28 01:07:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:07:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-28 01:07:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:13,045 INFO L225 Difference]: With dead ends: 359 [2021-12-28 01:07:13,049 INFO L226 Difference]: Without dead ends: 203 [2021-12-28 01:07:13,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:13,051 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 128 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:13,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1232 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-28 01:07:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-28 01:07:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 160 states have internal predecessors, (231), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-28 01:07:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 307 transitions. [2021-12-28 01:07:13,063 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 307 transitions. Word has length 35 [2021-12-28 01:07:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:13,063 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 307 transitions. [2021-12-28 01:07:13,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 01:07:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 307 transitions. [2021-12-28 01:07:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 01:07:13,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:13,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:07:13,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1454829501, now seen corresponding path program 1 times [2021-12-28 01:07:13,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:13,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099376816] [2021-12-28 01:07:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:13,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099376816] [2021-12-28 01:07:13,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099376816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368398591] [2021-12-28 01:07:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:13,136 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) [2021-12-28 01:07:13,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:07:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:07:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:13,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:07:13,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368398591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:13,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:13,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-28 01:07:13,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79601320] [2021-12-28 01:07:13,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:13,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:13,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:13,394 INFO L87 Difference]: Start difference. First operand 203 states and 307 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 01:07:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:13,429 INFO L93 Difference]: Finished difference Result 454 states and 701 transitions. [2021-12-28 01:07:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-28 01:07:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:13,431 INFO L225 Difference]: With dead ends: 454 [2021-12-28 01:07:13,431 INFO L226 Difference]: Without dead ends: 262 [2021-12-28 01:07:13,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:13,433 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 96 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:13,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 593 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-28 01:07:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2021-12-28 01:07:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 199 states have (on average 1.4572864321608041) internal successors, (290), 203 states have internal predecessors, (290), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-12-28 01:07:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2021-12-28 01:07:13,446 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 35 [2021-12-28 01:07:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:13,446 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2021-12-28 01:07:13,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 01:07:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2021-12-28 01:07:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:07:13,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:13,448 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:13,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 01:07:13,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -581068643, now seen corresponding path program 2 times [2021-12-28 01:07:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191457128] [2021-12-28 01:07:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-28 01:07:13,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191457128] [2021-12-28 01:07:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191457128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:13,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:13,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:13,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108667468] [2021-12-28 01:07:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:13,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:13,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:13,740 INFO L87 Difference]: Start difference. First operand 256 states and 386 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:13,784 INFO L93 Difference]: Finished difference Result 522 states and 798 transitions. [2021-12-28 01:07:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:13,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-28 01:07:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:13,787 INFO L225 Difference]: With dead ends: 522 [2021-12-28 01:07:13,788 INFO L226 Difference]: Without dead ends: 295 [2021-12-28 01:07:13,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:13,792 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 24 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:13,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 842 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-28 01:07:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2021-12-28 01:07:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 231 states have (on average 1.4155844155844155) internal successors, (327), 235 states have internal predecessors, (327), 51 states have call successors, (51), 9 states have call predecessors, (51), 9 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-12-28 01:07:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 429 transitions. [2021-12-28 01:07:13,811 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 429 transitions. Word has length 57 [2021-12-28 01:07:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:13,812 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 429 transitions. [2021-12-28 01:07:13,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 429 transitions. [2021-12-28 01:07:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:07:13,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:13,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:13,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:07:13,819 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1268107058, now seen corresponding path program 1 times [2021-12-28 01:07:13,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:13,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214314478] [2021-12-28 01:07:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 01:07:13,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:13,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214314478] [2021-12-28 01:07:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214314478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:13,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:13,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:13,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003477639] [2021-12-28 01:07:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:13,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:13,870 INFO L87 Difference]: Start difference. First operand 292 states and 429 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:13,899 INFO L93 Difference]: Finished difference Result 559 states and 845 transitions. [2021-12-28 01:07:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-28 01:07:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:13,902 INFO L225 Difference]: With dead ends: 559 [2021-12-28 01:07:13,902 INFO L226 Difference]: Without dead ends: 301 [2021-12-28 01:07:13,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:13,905 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 19 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:13,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 828 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-28 01:07:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-12-28 01:07:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 237 states have (on average 1.4135021097046414) internal successors, (335), 241 states have internal predecessors, (335), 51 states have call successors, (51), 10 states have call predecessors, (51), 10 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-12-28 01:07:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 437 transitions. [2021-12-28 01:07:13,930 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 437 transitions. Word has length 57 [2021-12-28 01:07:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:13,932 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 437 transitions. [2021-12-28 01:07:13,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 01:07:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 437 transitions. [2021-12-28 01:07:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 01:07:13,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:13,934 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:13,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:07:13,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash -996792945, now seen corresponding path program 1 times [2021-12-28 01:07:13,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:13,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797426547] [2021-12-28 01:07:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:13,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:07:14,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797426547] [2021-12-28 01:07:14,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797426547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:14,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699455691] [2021-12-28 01:07:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:14,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,029 INFO L87 Difference]: Start difference. First operand 299 states and 437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,045 INFO L93 Difference]: Finished difference Result 547 states and 813 transitions. [2021-12-28 01:07:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2021-12-28 01:07:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,047 INFO L225 Difference]: With dead ends: 547 [2021-12-28 01:07:14,048 INFO L226 Difference]: Without dead ends: 301 [2021-12-28 01:07:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,050 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 0 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1123 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-28 01:07:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-12-28 01:07:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 237 states have (on average 1.40084388185654) internal successors, (332), 241 states have internal predecessors, (332), 51 states have call successors, (51), 10 states have call predecessors, (51), 10 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-12-28 01:07:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 434 transitions. [2021-12-28 01:07:14,065 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 434 transitions. Word has length 75 [2021-12-28 01:07:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 434 transitions. [2021-12-28 01:07:14,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 434 transitions. [2021-12-28 01:07:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 01:07:14,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,068 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:07:14,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2026074511, now seen corresponding path program 1 times [2021-12-28 01:07:14,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310319438] [2021-12-28 01:07:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-28 01:07:14,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310319438] [2021-12-28 01:07:14,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310319438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814194718] [2021-12-28 01:07:14,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,131 INFO L87 Difference]: Start difference. First operand 299 states and 434 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,159 INFO L93 Difference]: Finished difference Result 584 states and 869 transitions. [2021-12-28 01:07:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 104 [2021-12-28 01:07:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,161 INFO L225 Difference]: With dead ends: 584 [2021-12-28 01:07:14,161 INFO L226 Difference]: Without dead ends: 343 [2021-12-28 01:07:14,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,162 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 25 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 842 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-28 01:07:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2021-12-28 01:07:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 274 states have (on average 1.364963503649635) internal successors, (374), 278 states have internal predecessors, (374), 54 states have call successors, (54), 11 states have call predecessors, (54), 11 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-28 01:07:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 482 transitions. [2021-12-28 01:07:14,172 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 482 transitions. Word has length 104 [2021-12-28 01:07:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 482 transitions. [2021-12-28 01:07:14,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 482 transitions. [2021-12-28 01:07:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-28 01:07:14,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,174 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:07:14,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1302977286, now seen corresponding path program 1 times [2021-12-28 01:07:14,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392261352] [2021-12-28 01:07:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-28 01:07:14,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392261352] [2021-12-28 01:07:14,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392261352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159180052] [2021-12-28 01:07:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,249 INFO L87 Difference]: Start difference. First operand 340 states and 482 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,284 INFO L93 Difference]: Finished difference Result 610 states and 889 transitions. [2021-12-28 01:07:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:14,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 105 [2021-12-28 01:07:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,287 INFO L225 Difference]: With dead ends: 610 [2021-12-28 01:07:14,287 INFO L226 Difference]: Without dead ends: 334 [2021-12-28 01:07:14,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,288 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 15 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 801 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-28 01:07:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2021-12-28 01:07:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 269 states have (on average 1.345724907063197) internal successors, (362), 273 states have internal predecessors, (362), 53 states have call successors, (53), 11 states have call predecessors, (53), 11 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-28 01:07:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 468 transitions. [2021-12-28 01:07:14,299 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 468 transitions. Word has length 105 [2021-12-28 01:07:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 468 transitions. [2021-12-28 01:07:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 01:07:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 468 transitions. [2021-12-28 01:07:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-28 01:07:14,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,301 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:07:14,301 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash 286281457, now seen corresponding path program 1 times [2021-12-28 01:07:14,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770970575] [2021-12-28 01:07:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-28 01:07:14,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770970575] [2021-12-28 01:07:14,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770970575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:14,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863800169] [2021-12-28 01:07:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:14,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:14,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,390 INFO L87 Difference]: Start difference. First operand 334 states and 468 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 01:07:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,408 INFO L93 Difference]: Finished difference Result 585 states and 838 transitions. [2021-12-28 01:07:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2021-12-28 01:07:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,410 INFO L225 Difference]: With dead ends: 585 [2021-12-28 01:07:14,410 INFO L226 Difference]: Without dead ends: 336 [2021-12-28 01:07:14,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,411 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 0 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1107 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-28 01:07:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2021-12-28 01:07:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 269 states have (on average 1.3345724907063197) internal successors, (359), 273 states have internal predecessors, (359), 53 states have call successors, (53), 11 states have call predecessors, (53), 11 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-28 01:07:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 465 transitions. [2021-12-28 01:07:14,426 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 465 transitions. Word has length 124 [2021-12-28 01:07:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,427 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 465 transitions. [2021-12-28 01:07:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 01:07:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 465 transitions. [2021-12-28 01:07:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-28 01:07:14,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,428 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:07:14,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1881609517, now seen corresponding path program 1 times [2021-12-28 01:07:14,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740769651] [2021-12-28 01:07:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-12-28 01:07:14,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740769651] [2021-12-28 01:07:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740769651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312238265] [2021-12-28 01:07:14,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,496 INFO L87 Difference]: Start difference. First operand 334 states and 465 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 01:07:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,531 INFO L93 Difference]: Finished difference Result 548 states and 798 transitions. [2021-12-28 01:07:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 157 [2021-12-28 01:07:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,533 INFO L225 Difference]: With dead ends: 548 [2021-12-28 01:07:14,534 INFO L226 Difference]: Without dead ends: 332 [2021-12-28 01:07:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,535 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 13 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 769 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-28 01:07:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-12-28 01:07:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 268 states have (on average 1.3320895522388059) internal successors, (357), 272 states have internal predecessors, (357), 52 states have call successors, (52), 11 states have call predecessors, (52), 11 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-28 01:07:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 461 transitions. [2021-12-28 01:07:14,544 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 461 transitions. Word has length 157 [2021-12-28 01:07:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,544 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 461 transitions. [2021-12-28 01:07:14,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 01:07:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 461 transitions. [2021-12-28 01:07:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-28 01:07:14,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,546 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:07:14,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -855321017, now seen corresponding path program 1 times [2021-12-28 01:07:14,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56219566] [2021-12-28 01:07:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-28 01:07:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-28 01:07:14,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56219566] [2021-12-28 01:07:14,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56219566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777519650] [2021-12-28 01:07:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,643 INFO L87 Difference]: Start difference. First operand 332 states and 461 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:07:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,677 INFO L93 Difference]: Finished difference Result 488 states and 694 transitions. [2021-12-28 01:07:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 176 [2021-12-28 01:07:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,680 INFO L225 Difference]: With dead ends: 488 [2021-12-28 01:07:14,680 INFO L226 Difference]: Without dead ends: 315 [2021-12-28 01:07:14,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,681 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 35 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 750 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-28 01:07:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-12-28 01:07:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 254 states have (on average 1.3228346456692914) internal successors, (336), 258 states have internal predecessors, (336), 49 states have call successors, (49), 11 states have call predecessors, (49), 11 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-28 01:07:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 434 transitions. [2021-12-28 01:07:14,689 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 434 transitions. Word has length 176 [2021-12-28 01:07:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,690 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 434 transitions. [2021-12-28 01:07:14,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:07:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 434 transitions. [2021-12-28 01:07:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-28 01:07:14,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,692 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:07:14,693 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1739802048, now seen corresponding path program 1 times [2021-12-28 01:07:14,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600590699] [2021-12-28 01:07:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-28 01:07:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-12-28 01:07:14,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600590699] [2021-12-28 01:07:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600590699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:14,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785968928] [2021-12-28 01:07:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:14,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:14,767 INFO L87 Difference]: Start difference. First operand 315 states and 434 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:07:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,802 INFO L93 Difference]: Finished difference Result 471 states and 667 transitions. [2021-12-28 01:07:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 178 [2021-12-28 01:07:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,804 INFO L225 Difference]: With dead ends: 471 [2021-12-28 01:07:14,804 INFO L226 Difference]: Without dead ends: 296 [2021-12-28 01:07:14,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,805 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 30 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 754 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-28 01:07:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-12-28 01:07:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 238 states have (on average 1.315126050420168) internal successors, (313), 242 states have internal predecessors, (313), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-28 01:07:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 405 transitions. [2021-12-28 01:07:14,812 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 405 transitions. Word has length 178 [2021-12-28 01:07:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,813 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 405 transitions. [2021-12-28 01:07:14,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:07:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 405 transitions. [2021-12-28 01:07:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 01:07:14,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,815 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:07:14,815 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1086957777, now seen corresponding path program 1 times [2021-12-28 01:07:14,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187235624] [2021-12-28 01:07:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-28 01:07:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-12-28 01:07:14,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187235624] [2021-12-28 01:07:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187235624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:14,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:14,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:14,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465723912] [2021-12-28 01:07:14,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:14,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:14,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,897 INFO L87 Difference]: Start difference. First operand 296 states and 405 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 01:07:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:14,910 INFO L93 Difference]: Finished difference Result 451 states and 637 transitions. [2021-12-28 01:07:14,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:14,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 179 [2021-12-28 01:07:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:14,912 INFO L225 Difference]: With dead ends: 451 [2021-12-28 01:07:14,912 INFO L226 Difference]: Without dead ends: 296 [2021-12-28 01:07:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:14,913 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 0 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:14,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1085 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-28 01:07:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-12-28 01:07:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 238 states have (on average 1.2899159663865547) internal successors, (307), 242 states have internal predecessors, (307), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-28 01:07:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 399 transitions. [2021-12-28 01:07:14,920 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 399 transitions. Word has length 179 [2021-12-28 01:07:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 399 transitions. [2021-12-28 01:07:14,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 01:07:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 399 transitions. [2021-12-28 01:07:14,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-28 01:07:14,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:14,923 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:07:14,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2059675566, now seen corresponding path program 1 times [2021-12-28 01:07:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261700887] [2021-12-28 01:07:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-28 01:07:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 138 proven. 11 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-28 01:07:14,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261700887] [2021-12-28 01:07:14,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261700887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:14,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873092542] [2021-12-28 01:07:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:14,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:14,995 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) [2021-12-28 01:07:15,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:07:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 01:07:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 138 proven. 11 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-28 01:07:15,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-28 01:07:15,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873092542] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:15,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 01:07:15,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2021-12-28 01:07:15,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031981079] [2021-12-28 01:07:15,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:15,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:15,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:15,588 INFO L87 Difference]: Start difference. First operand 296 states and 399 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:07:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:15,617 INFO L93 Difference]: Finished difference Result 472 states and 659 transitions. [2021-12-28 01:07:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 186 [2021-12-28 01:07:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:15,619 INFO L225 Difference]: With dead ends: 472 [2021-12-28 01:07:15,619 INFO L226 Difference]: Without dead ends: 275 [2021-12-28 01:07:15,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:15,620 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 25 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:15,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 753 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-28 01:07:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-12-28 01:07:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 220 states have (on average 1.2818181818181817) internal successors, (282), 224 states have internal predecessors, (282), 43 states have call successors, (43), 11 states have call predecessors, (43), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-28 01:07:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 368 transitions. [2021-12-28 01:07:15,628 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 368 transitions. Word has length 186 [2021-12-28 01:07:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:15,628 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 368 transitions. [2021-12-28 01:07:15,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:07:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 368 transitions. [2021-12-28 01:07:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-28 01:07:15,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:15,630 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:15,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 01:07:15,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -347660191, now seen corresponding path program 1 times [2021-12-28 01:07:15,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847172365] [2021-12-28 01:07:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:15,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-12-28 01:07:15,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847172365] [2021-12-28 01:07:15,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847172365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:15,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:15,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:15,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470399115] [2021-12-28 01:07:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:15,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:15,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:15,914 INFO L87 Difference]: Start difference. First operand 275 states and 368 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 01:07:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:15,932 INFO L93 Difference]: Finished difference Result 429 states and 600 transitions. [2021-12-28 01:07:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 210 [2021-12-28 01:07:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:15,934 INFO L225 Difference]: With dead ends: 429 [2021-12-28 01:07:15,934 INFO L226 Difference]: Without dead ends: 281 [2021-12-28 01:07:15,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:15,935 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 6 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:15,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 794 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-28 01:07:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-12-28 01:07:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 223 states have (on average 1.2780269058295963) internal successors, (285), 227 states have internal predecessors, (285), 43 states have call successors, (43), 12 states have call predecessors, (43), 12 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-28 01:07:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 371 transitions. [2021-12-28 01:07:15,942 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 371 transitions. Word has length 210 [2021-12-28 01:07:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:15,943 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 371 transitions. [2021-12-28 01:07:15,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 01:07:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 371 transitions. [2021-12-28 01:07:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-28 01:07:15,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:15,945 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:15,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:07:15,945 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -855668969, now seen corresponding path program 1 times [2021-12-28 01:07:15,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886954863] [2021-12-28 01:07:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:15,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-12-28 01:07:16,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886954863] [2021-12-28 01:07:16,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886954863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084321232] [2021-12-28 01:07:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:16,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:16,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:16,059 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) [2021-12-28 01:07:16,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:07:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 01:07:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-12-28 01:07:16,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:16,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084321232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:16,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:16,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 01:07:16,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592209774] [2021-12-28 01:07:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:16,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:16,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:16,419 INFO L87 Difference]: Start difference. First operand 279 states and 371 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 01:07:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:16,442 INFO L93 Difference]: Finished difference Result 438 states and 607 transitions. [2021-12-28 01:07:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 219 [2021-12-28 01:07:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:16,445 INFO L225 Difference]: With dead ends: 438 [2021-12-28 01:07:16,445 INFO L226 Difference]: Without dead ends: 286 [2021-12-28 01:07:16,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:16,446 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 7 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:16,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 799 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-28 01:07:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2021-12-28 01:07:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 227 states have (on average 1.2731277533039647) internal successors, (289), 231 states have internal predecessors, (289), 43 states have call successors, (43), 13 states have call predecessors, (43), 13 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-28 01:07:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 375 transitions. [2021-12-28 01:07:16,453 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 375 transitions. Word has length 219 [2021-12-28 01:07:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:16,453 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 375 transitions. [2021-12-28 01:07:16,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 01:07:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 375 transitions. [2021-12-28 01:07:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-28 01:07:16,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:16,455 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:16,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:16,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:16,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1462568680, now seen corresponding path program 1 times [2021-12-28 01:07:16,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:16,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814541323] [2021-12-28 01:07:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:16,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-12-28 01:07:16,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814541323] [2021-12-28 01:07:16,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814541323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562678400] [2021-12-28 01:07:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:16,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:16,783 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) [2021-12-28 01:07:16,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:07:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 01:07:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-12-28 01:07:17,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:17,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562678400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:17,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:17,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 01:07:17,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758212969] [2021-12-28 01:07:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:17,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:17,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:17,151 INFO L87 Difference]: Start difference. First operand 284 states and 375 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-28 01:07:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:17,169 INFO L93 Difference]: Finished difference Result 440 states and 605 transitions. [2021-12-28 01:07:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 229 [2021-12-28 01:07:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:17,171 INFO L225 Difference]: With dead ends: 440 [2021-12-28 01:07:17,171 INFO L226 Difference]: Without dead ends: 283 [2021-12-28 01:07:17,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:17,172 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 7 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:17,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 785 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-28 01:07:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2021-12-28 01:07:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 230 states have internal predecessors, (286), 42 states have call successors, (42), 13 states have call predecessors, (42), 13 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-28 01:07:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 370 transitions. [2021-12-28 01:07:17,178 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 370 transitions. Word has length 229 [2021-12-28 01:07:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:17,179 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 370 transitions. [2021-12-28 01:07:17,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-28 01:07:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 370 transitions. [2021-12-28 01:07:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-28 01:07:17,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:17,181 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:17,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:17,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:17,393 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:17,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 888305907, now seen corresponding path program 1 times [2021-12-28 01:07:17,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:17,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741464687] [2021-12-28 01:07:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:17,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2021-12-28 01:07:17,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:17,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741464687] [2021-12-28 01:07:17,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741464687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:17,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295912009] [2021-12-28 01:07:17,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:17,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:17,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:17,495 INFO L87 Difference]: Start difference. First operand 283 states and 370 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 01:07:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:17,670 INFO L93 Difference]: Finished difference Result 481 states and 666 transitions. [2021-12-28 01:07:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:07:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 239 [2021-12-28 01:07:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:17,672 INFO L225 Difference]: With dead ends: 481 [2021-12-28 01:07:17,672 INFO L226 Difference]: Without dead ends: 325 [2021-12-28 01:07:17,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:17,673 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 181 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:17,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 629 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-28 01:07:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 282. [2021-12-28 01:07:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 227 states have (on average 1.2555066079295154) internal successors, (285), 229 states have internal predecessors, (285), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-28 01:07:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 367 transitions. [2021-12-28 01:07:17,681 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 367 transitions. Word has length 239 [2021-12-28 01:07:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:17,682 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 367 transitions. [2021-12-28 01:07:17,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-28 01:07:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 367 transitions. [2021-12-28 01:07:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-28 01:07:17,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:17,684 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:17,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:07:17,684 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1279032433, now seen corresponding path program 1 times [2021-12-28 01:07:17,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189389593] [2021-12-28 01:07:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:17,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2021-12-28 01:07:17,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189389593] [2021-12-28 01:07:17,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189389593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:17,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:17,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:17,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989914314] [2021-12-28 01:07:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:17,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:17,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:17,801 INFO L87 Difference]: Start difference. First operand 282 states and 367 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 01:07:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:18,192 INFO L93 Difference]: Finished difference Result 668 states and 899 transitions. [2021-12-28 01:07:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:07:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 240 [2021-12-28 01:07:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:18,195 INFO L225 Difference]: With dead ends: 668 [2021-12-28 01:07:18,195 INFO L226 Difference]: Without dead ends: 513 [2021-12-28 01:07:18,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:18,197 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 433 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:18,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 792 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:07:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-28 01:07:18,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 504. [2021-12-28 01:07:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 402 states have (on average 1.308457711442786) internal successors, (526), 404 states have internal predecessors, (526), 70 states have call successors, (70), 31 states have call predecessors, (70), 31 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-28 01:07:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 666 transitions. [2021-12-28 01:07:18,215 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 666 transitions. Word has length 240 [2021-12-28 01:07:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:18,215 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 666 transitions. [2021-12-28 01:07:18,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 3 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-28 01:07:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 666 transitions. [2021-12-28 01:07:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-28 01:07:18,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:18,217 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:18,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 01:07:18,218 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1440781215, now seen corresponding path program 1 times [2021-12-28 01:07:18,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:18,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921179492] [2021-12-28 01:07:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:18,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2021-12-28 01:07:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-12-28 01:07:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-12-28 01:07:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-12-28 01:07:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-12-28 01:07:18,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921179492] [2021-12-28 01:07:18,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921179492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:18,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:18,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:18,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934114890] [2021-12-28 01:07:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:18,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:18,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:18,362 INFO L87 Difference]: Start difference. First operand 504 states and 666 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-28 01:07:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:18,617 INFO L93 Difference]: Finished difference Result 1103 states and 1508 transitions. [2021-12-28 01:07:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 273 [2021-12-28 01:07:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:18,621 INFO L225 Difference]: With dead ends: 1103 [2021-12-28 01:07:18,621 INFO L226 Difference]: Without dead ends: 807 [2021-12-28 01:07:18,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:18,622 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 219 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:18,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 592 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-12-28 01:07:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 638. [2021-12-28 01:07:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 511 states have (on average 1.3150684931506849) internal successors, (672), 517 states have internal predecessors, (672), 85 states have call successors, (85), 41 states have call predecessors, (85), 41 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-12-28 01:07:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 842 transitions. [2021-12-28 01:07:18,651 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 842 transitions. Word has length 273 [2021-12-28 01:07:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 842 transitions. [2021-12-28 01:07:18,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-28 01:07:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 842 transitions. [2021-12-28 01:07:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-28 01:07:18,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:18,655 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:18,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 01:07:18,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1894509391, now seen corresponding path program 1 times [2021-12-28 01:07:18,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:18,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255954556] [2021-12-28 01:07:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:18,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-12-28 01:07:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2021-12-28 01:07:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-12-28 01:07:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-12-28 01:07:18,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:18,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255954556] [2021-12-28 01:07:18,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255954556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:18,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:18,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:18,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136169336] [2021-12-28 01:07:18,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:18,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:18,784 INFO L87 Difference]: Start difference. First operand 638 states and 842 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-28 01:07:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:19,085 INFO L93 Difference]: Finished difference Result 1404 states and 1902 transitions. [2021-12-28 01:07:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 274 [2021-12-28 01:07:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:19,089 INFO L225 Difference]: With dead ends: 1404 [2021-12-28 01:07:19,089 INFO L226 Difference]: Without dead ends: 1013 [2021-12-28 01:07:19,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:19,090 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 222 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:19,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 625 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-12-28 01:07:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 999. [2021-12-28 01:07:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 792 states have (on average 1.3396464646464648) internal successors, (1061), 806 states have internal predecessors, (1061), 139 states have call successors, (139), 67 states have call predecessors, (139), 67 states have return successors, (139), 129 states have call predecessors, (139), 139 states have call successors, (139) [2021-12-28 01:07:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1339 transitions. [2021-12-28 01:07:19,136 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1339 transitions. Word has length 274 [2021-12-28 01:07:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:19,137 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1339 transitions. [2021-12-28 01:07:19,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-28 01:07:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1339 transitions. [2021-12-28 01:07:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-28 01:07:19,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:19,139 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:19,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 01:07:19,139 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -58219654, now seen corresponding path program 1 times [2021-12-28 01:07:19,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:19,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228003968] [2021-12-28 01:07:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-12-28 01:07:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2021-12-28 01:07:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-12-28 01:07:19,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228003968] [2021-12-28 01:07:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228003968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:19,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:19,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:07:19,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72211636] [2021-12-28 01:07:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:19,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:19,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:07:19,228 INFO L87 Difference]: Start difference. First operand 999 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:19,541 INFO L93 Difference]: Finished difference Result 2307 states and 3165 transitions. [2021-12-28 01:07:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 275 [2021-12-28 01:07:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:19,550 INFO L225 Difference]: With dead ends: 2307 [2021-12-28 01:07:19,551 INFO L226 Difference]: Without dead ends: 1601 [2021-12-28 01:07:19,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:19,552 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 224 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:19,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 657 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-12-28 01:07:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1575. [2021-12-28 01:07:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1236 states have (on average 1.3632686084142396) internal successors, (1685), 1264 states have internal predecessors, (1685), 231 states have call successors, (231), 107 states have call predecessors, (231), 107 states have return successors, (231), 211 states have call predecessors, (231), 231 states have call successors, (231) [2021-12-28 01:07:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2147 transitions. [2021-12-28 01:07:19,632 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2147 transitions. Word has length 275 [2021-12-28 01:07:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:19,632 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 2147 transitions. [2021-12-28 01:07:19,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2147 transitions. [2021-12-28 01:07:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-28 01:07:19,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:19,635 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:19,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 01:07:19,635 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -452586440, now seen corresponding path program 1 times [2021-12-28 01:07:19,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:19,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270121489] [2021-12-28 01:07:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:19,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-12-28 01:07:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2021-12-28 01:07:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2021-12-28 01:07:19,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270121489] [2021-12-28 01:07:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270121489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:19,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969853572] [2021-12-28 01:07:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:19,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:19,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:19,778 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) [2021-12-28 01:07:19,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 01:07:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:07:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-28 01:07:20,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969853572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:20,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:20,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-28 01:07:20,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63911349] [2021-12-28 01:07:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:20,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:07:20,266 INFO L87 Difference]: Start difference. First operand 1575 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:20,360 INFO L93 Difference]: Finished difference Result 2897 states and 4006 transitions. [2021-12-28 01:07:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 275 [2021-12-28 01:07:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:20,366 INFO L225 Difference]: With dead ends: 2897 [2021-12-28 01:07:20,366 INFO L226 Difference]: Without dead ends: 1575 [2021-12-28 01:07:20,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:07:20,369 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 51 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 702 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-12-28 01:07:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1575. [2021-12-28 01:07:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1236 states have (on average 1.3438511326860842) internal successors, (1661), 1264 states have internal predecessors, (1661), 231 states have call successors, (231), 107 states have call predecessors, (231), 107 states have return successors, (231), 211 states have call predecessors, (231), 231 states have call successors, (231) [2021-12-28 01:07:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2123 transitions. [2021-12-28 01:07:20,437 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2123 transitions. Word has length 275 [2021-12-28 01:07:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:20,437 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 2123 transitions. [2021-12-28 01:07:20,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2123 transitions. [2021-12-28 01:07:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-28 01:07:20,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:20,439 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:20,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:20,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-28 01:07:20,657 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1485642055, now seen corresponding path program 1 times [2021-12-28 01:07:20,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:20,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573964345] [2021-12-28 01:07:20,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:20,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2021-12-28 01:07:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-12-28 01:07:20,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:20,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573964345] [2021-12-28 01:07:20,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573964345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:20,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182371964] [2021-12-28 01:07:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:20,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:20,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:20,781 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) [2021-12-28 01:07:20,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 01:07:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:20,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:07:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-12-28 01:07:21,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:21,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182371964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:21,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-28 01:07:21,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744764121] [2021-12-28 01:07:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:21,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:21,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:07:21,261 INFO L87 Difference]: Start difference. First operand 1575 states and 2123 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:21,340 INFO L93 Difference]: Finished difference Result 2897 states and 3950 transitions. [2021-12-28 01:07:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 276 [2021-12-28 01:07:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:21,346 INFO L225 Difference]: With dead ends: 2897 [2021-12-28 01:07:21,346 INFO L226 Difference]: Without dead ends: 1623 [2021-12-28 01:07:21,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:07:21,349 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 15 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 725 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-12-28 01:07:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1623. [2021-12-28 01:07:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1276 states have (on average 1.3456112852664577) internal successors, (1717), 1304 states have internal predecessors, (1717), 231 states have call successors, (231), 115 states have call predecessors, (231), 115 states have return successors, (231), 211 states have call predecessors, (231), 231 states have call successors, (231) [2021-12-28 01:07:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2179 transitions. [2021-12-28 01:07:21,411 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2179 transitions. Word has length 276 [2021-12-28 01:07:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:21,411 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2179 transitions. [2021-12-28 01:07:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 01:07:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2179 transitions. [2021-12-28 01:07:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-28 01:07:21,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:21,413 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:21,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:21,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-28 01:07:21,620 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash 703925714, now seen corresponding path program 1 times [2021-12-28 01:07:21,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:21,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139019464] [2021-12-28 01:07:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:21,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2021-12-28 01:07:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2021-12-28 01:07:21,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139019464] [2021-12-28 01:07:21,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139019464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:21,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:21,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:21,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643080440] [2021-12-28 01:07:21,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:21,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:21,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:21,778 INFO L87 Difference]: Start difference. First operand 1623 states and 2179 transitions. Second operand has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-28 01:07:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:22,242 INFO L93 Difference]: Finished difference Result 2481 states and 3558 transitions. [2021-12-28 01:07:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:07:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 277 [2021-12-28 01:07:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:22,252 INFO L225 Difference]: With dead ends: 2481 [2021-12-28 01:07:22,252 INFO L226 Difference]: Without dead ends: 2479 [2021-12-28 01:07:22,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:07:22,254 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 250 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:22,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1649 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:07:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-12-28 01:07:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1671. [2021-12-28 01:07:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1308 states have (on average 1.3371559633027523) internal successors, (1749), 1344 states have internal predecessors, (1749), 239 states have call successors, (239), 123 states have call predecessors, (239), 123 states have return successors, (239), 211 states have call predecessors, (239), 239 states have call successors, (239) [2021-12-28 01:07:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2227 transitions. [2021-12-28 01:07:22,345 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2227 transitions. Word has length 277 [2021-12-28 01:07:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:22,346 INFO L470 AbstractCegarLoop]: Abstraction has 1671 states and 2227 transitions. [2021-12-28 01:07:22,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-28 01:07:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2227 transitions. [2021-12-28 01:07:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-28 01:07:22,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:22,348 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:22,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 01:07:22,348 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1034356429, now seen corresponding path program 1 times [2021-12-28 01:07:22,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:22,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531781459] [2021-12-28 01:07:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:22,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2021-12-28 01:07:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-28 01:07:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 142 proven. 27 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-12-28 01:07:22,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531781459] [2021-12-28 01:07:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531781459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519594494] [2021-12-28 01:07:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:22,516 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) [2021-12-28 01:07:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 01:07:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-28 01:07:22,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 251 proven. 37 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-28 01:07:23,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 146 proven. 23 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-12-28 01:07:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519594494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:23,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2021-12-28 01:07:23,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460301727] [2021-12-28 01:07:23,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:23,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-28 01:07:23,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:23,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-28 01:07:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-12-28 01:07:23,524 INFO L87 Difference]: Start difference. First operand 1671 states and 2227 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 14 states have internal predecessors, (158), 5 states have call successors, (32), 5 states have call predecessors, (32), 9 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-12-28 01:07:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:25,204 INFO L93 Difference]: Finished difference Result 4890 states and 7030 transitions. [2021-12-28 01:07:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 01:07:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 14 states have internal predecessors, (158), 5 states have call successors, (32), 5 states have call predecessors, (32), 9 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) Word has length 285 [2021-12-28 01:07:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:25,216 INFO L225 Difference]: With dead ends: 4890 [2021-12-28 01:07:25,216 INFO L226 Difference]: Without dead ends: 3520 [2021-12-28 01:07:25,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 619 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 01:07:25,220 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 708 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:25,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 3018 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 01:07:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2021-12-28 01:07:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 2498. [2021-12-28 01:07:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1952 states have (on average 1.3288934426229508) internal successors, (2594), 2004 states have internal predecessors, (2594), 356 states have call successors, (356), 183 states have call predecessors, (356), 189 states have return successors, (364), 318 states have call predecessors, (364), 356 states have call successors, (364) [2021-12-28 01:07:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3314 transitions. [2021-12-28 01:07:25,369 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3314 transitions. Word has length 285 [2021-12-28 01:07:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:25,369 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 3314 transitions. [2021-12-28 01:07:25,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 14 states have internal predecessors, (158), 5 states have call successors, (32), 5 states have call predecessors, (32), 9 states have return successors, (31), 8 states have call predecessors, (31), 5 states have call successors, (31) [2021-12-28 01:07:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3314 transitions. [2021-12-28 01:07:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-28 01:07:25,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:25,373 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:25,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:25,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:25,581 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash -72742412, now seen corresponding path program 1 times [2021-12-28 01:07:25,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336898944] [2021-12-28 01:07:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:25,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2021-12-28 01:07:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-28 01:07:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-28 01:07:25,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336898944] [2021-12-28 01:07:25,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336898944] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336886019] [2021-12-28 01:07:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:25,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:25,681 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) [2021-12-28 01:07:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 01:07:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:25,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 01:07:25,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-12-28 01:07:26,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:26,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336886019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:26,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:26,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 01:07:26,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174576976] [2021-12-28 01:07:26,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:26,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:26,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:26,157 INFO L87 Difference]: Start difference. First operand 2498 states and 3314 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-28 01:07:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:26,286 INFO L93 Difference]: Finished difference Result 4829 states and 6504 transitions. [2021-12-28 01:07:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 285 [2021-12-28 01:07:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:26,293 INFO L225 Difference]: With dead ends: 4829 [2021-12-28 01:07:26,293 INFO L226 Difference]: Without dead ends: 2434 [2021-12-28 01:07:26,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:26,298 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 11 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:26,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 725 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-12-28 01:07:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2021-12-28 01:07:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 1908 states have (on average 1.3123689727463312) internal successors, (2504), 1960 states have internal predecessors, (2504), 340 states have call successors, (340), 183 states have call predecessors, (340), 185 states have return successors, (344), 298 states have call predecessors, (344), 340 states have call successors, (344) [2021-12-28 01:07:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3188 transitions. [2021-12-28 01:07:26,390 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3188 transitions. Word has length 285 [2021-12-28 01:07:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:26,391 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3188 transitions. [2021-12-28 01:07:26,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-28 01:07:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3188 transitions. [2021-12-28 01:07:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-28 01:07:26,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:26,393 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:26,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:26,607 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -658847465, now seen corresponding path program 1 times [2021-12-28 01:07:26,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909473333] [2021-12-28 01:07:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:26,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 01:07:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 01:07:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-28 01:07:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-28 01:07:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2021-12-28 01:07:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-28 01:07:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-12-28 01:07:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-12-28 01:07:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2021-12-28 01:07:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2021-12-28 01:07:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2021-12-28 01:07:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 121 proven. 19 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2021-12-28 01:07:26,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:26,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909473333] [2021-12-28 01:07:26,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909473333] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:26,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508992587] [2021-12-28 01:07:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:26,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:26,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:26,709 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) [2021-12-28 01:07:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 01:07:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 01:07:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-12-28 01:07:27,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508992587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:27,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:27,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-28 01:07:27,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932795806] [2021-12-28 01:07:27,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:27,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:07:27,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:07:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:27,160 INFO L87 Difference]: Start difference. First operand 2434 states and 3188 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-28 01:07:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:27,277 INFO L93 Difference]: Finished difference Result 4590 states and 6117 transitions. [2021-12-28 01:07:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:07:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 288 [2021-12-28 01:07:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:27,285 INFO L225 Difference]: With dead ends: 4590 [2021-12-28 01:07:27,285 INFO L226 Difference]: Without dead ends: 2241 [2021-12-28 01:07:27,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:27,290 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 8 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:27,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 728 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:07:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-12-28 01:07:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2241. [2021-12-28 01:07:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 1745 states have (on average 1.3060171919770773) internal successors, (2279), 1797 states have internal predecessors, (2279), 323 states have call successors, (323), 172 states have call predecessors, (323), 172 states have return successors, (323), 279 states have call predecessors, (323), 323 states have call successors, (323) [2021-12-28 01:07:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 2925 transitions. [2021-12-28 01:07:27,393 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 2925 transitions. Word has length 288 [2021-12-28 01:07:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 2241 states and 2925 transitions. [2021-12-28 01:07:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-28 01:07:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 2925 transitions. [2021-12-28 01:07:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-12-28 01:07:27,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:27,395 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 8, 8, 8, 7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:27,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:27,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:27,611 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:27,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:27,612 INFO L85 PathProgramCache]: Analyzing trace with hash 940177722, now seen corresponding path program 1 times [2021-12-28 01:07:27,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9414334] [2021-12-28 01:07:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:27,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2021-12-28 01:07:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-28 01:07:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 01:07:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-12-28 01:07:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 16 proven. 146 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-12-28 01:07:27,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9414334] [2021-12-28 01:07:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9414334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187996286] [2021-12-28 01:07:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:27,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:27,896 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) [2021-12-28 01:07:27,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 01:07:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 01:07:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2021-12-28 01:07:28,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:28,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187996286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:28,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:28,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2021-12-28 01:07:28,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394461553] [2021-12-28 01:07:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:28,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:07:28,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:07:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2021-12-28 01:07:28,472 INFO L87 Difference]: Start difference. First operand 2241 states and 2925 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 9 states have internal predecessors, (115), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 01:07:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:29,393 INFO L93 Difference]: Finished difference Result 8387 states and 11327 transitions. [2021-12-28 01:07:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 01:07:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 9 states have internal predecessors, (115), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 300 [2021-12-28 01:07:29,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:29,416 INFO L225 Difference]: With dead ends: 8387 [2021-12-28 01:07:29,417 INFO L226 Difference]: Without dead ends: 6741 [2021-12-28 01:07:29,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-12-28 01:07:29,425 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 1124 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 3777 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:29,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 3777 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:07:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6741 states. [2021-12-28 01:07:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6741 to 5317. [2021-12-28 01:07:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 4098 states have (on average 1.2962420693020986) internal successors, (5312), 4226 states have internal predecessors, (5312), 787 states have call successors, (787), 431 states have call predecessors, (787), 431 states have return successors, (787), 667 states have call predecessors, (787), 787 states have call successors, (787) [2021-12-28 01:07:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 6886 transitions. [2021-12-28 01:07:29,700 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 6886 transitions. Word has length 300 [2021-12-28 01:07:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:29,701 INFO L470 AbstractCegarLoop]: Abstraction has 5317 states and 6886 transitions. [2021-12-28 01:07:29,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 9 states have internal predecessors, (115), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 01:07:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 6886 transitions. [2021-12-28 01:07:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-28 01:07:29,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:29,703 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:29,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-28 01:07:29,919 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1154930967, now seen corresponding path program 1 times [2021-12-28 01:07:29,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:29,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800953787] [2021-12-28 01:07:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:29,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:29,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2021-12-28 01:07:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-12-28 01:07:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-12-28 01:07:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-12-28 01:07:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2021-12-28 01:07:30,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800953787] [2021-12-28 01:07:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800953787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:30,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:07:30,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60947515] [2021-12-28 01:07:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:30,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:07:30,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:07:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:30,043 INFO L87 Difference]: Start difference. First operand 5317 states and 6886 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 01:07:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:30,890 INFO L93 Difference]: Finished difference Result 16895 states and 24131 transitions. [2021-12-28 01:07:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:07:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 306 [2021-12-28 01:07:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:30,933 INFO L225 Difference]: With dead ends: 16895 [2021-12-28 01:07:30,934 INFO L226 Difference]: Without dead ends: 12113 [2021-12-28 01:07:30,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:07:30,943 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 467 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:30,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 2189 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:07:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12113 states. [2021-12-28 01:07:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12113 to 5749. [2021-12-28 01:07:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 4446 states have (on average 1.3063427800269904) internal successors, (5808), 4574 states have internal predecessors, (5808), 871 states have call successors, (871), 431 states have call predecessors, (871), 431 states have return successors, (871), 751 states have call predecessors, (871), 871 states have call successors, (871) [2021-12-28 01:07:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 7550 transitions. [2021-12-28 01:07:31,276 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 7550 transitions. Word has length 306 [2021-12-28 01:07:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:31,277 INFO L470 AbstractCegarLoop]: Abstraction has 5749 states and 7550 transitions. [2021-12-28 01:07:31,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 6 states have internal predecessors, (103), 5 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-28 01:07:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 7550 transitions. [2021-12-28 01:07:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-28 01:07:31,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:31,280 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:31,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 01:07:31,280 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash -675484013, now seen corresponding path program 1 times [2021-12-28 01:07:31,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330183880] [2021-12-28 01:07:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:31,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:07:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-28 01:07:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2021-12-28 01:07:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:07:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2021-12-28 01:07:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2021-12-28 01:07:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2021-12-28 01:07:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-12-28 01:07:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-12-28 01:07:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-12-28 01:07:31,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:31,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330183880] [2021-12-28 01:07:31,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330183880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:31,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:31,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:07:31,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144050018] [2021-12-28 01:07:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:31,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:07:31,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:07:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:31,395 INFO L87 Difference]: Start difference. First operand 5749 states and 7550 transitions. Second operand has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 01:07:31,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:31,856 INFO L93 Difference]: Finished difference Result 10805 states and 14237 transitions. [2021-12-28 01:07:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:07:31,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) Word has length 306 [2021-12-28 01:07:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:31,874 INFO L225 Difference]: With dead ends: 10805 [2021-12-28 01:07:31,877 INFO L226 Difference]: Without dead ends: 5656 [2021-12-28 01:07:31,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:31,886 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 59 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:31,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 880 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:07:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-12-28 01:07:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 5656. [2021-12-28 01:07:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 4368 states have (on average 1.3047161172161172) internal successors, (5699), 4488 states have internal predecessors, (5699), 864 states have call successors, (864), 424 states have call predecessors, (864), 423 states have return successors, (863), 750 states have call predecessors, (863), 863 states have call successors, (863) [2021-12-28 01:07:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 7426 transitions. [2021-12-28 01:07:32,200 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 7426 transitions. Word has length 306 [2021-12-28 01:07:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:32,200 INFO L470 AbstractCegarLoop]: Abstraction has 5656 states and 7426 transitions. [2021-12-28 01:07:32,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 01:07:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 7426 transitions. [2021-12-28 01:07:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-28 01:07:32,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:32,203 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:32,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 01:07:32,203 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1100237527, now seen corresponding path program 1 times [2021-12-28 01:07:32,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:32,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477455317] [2021-12-28 01:07:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:32,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2021-12-28 01:07:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 01:07:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-12-28 01:07:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2021-12-28 01:07:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-12-28 01:07:32,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:32,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477455317] [2021-12-28 01:07:32,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477455317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:32,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:32,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:07:32,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061161972] [2021-12-28 01:07:32,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:32,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:07:32,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:07:32,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:07:32,313 INFO L87 Difference]: Start difference. First operand 5656 states and 7426 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-28 01:07:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:32,818 INFO L93 Difference]: Finished difference Result 11313 states and 14814 transitions. [2021-12-28 01:07:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:07:32,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 310 [2021-12-28 01:07:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:32,832 INFO L225 Difference]: With dead ends: 11313 [2021-12-28 01:07:32,833 INFO L226 Difference]: Without dead ends: 5909 [2021-12-28 01:07:32,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:32,843 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 304 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:32,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 462 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:07:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2021-12-28 01:07:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 2889. [2021-12-28 01:07:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2254 states have (on average 1.2781721384205855) internal successors, (2881), 2321 states have internal predecessors, (2881), 424 states have call successors, (424), 211 states have call predecessors, (424), 210 states have return successors, (423), 363 states have call predecessors, (423), 423 states have call successors, (423) [2021-12-28 01:07:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 3728 transitions. [2021-12-28 01:07:33,070 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 3728 transitions. Word has length 310 [2021-12-28 01:07:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:33,070 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 3728 transitions. [2021-12-28 01:07:33,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-12-28 01:07:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 3728 transitions. [2021-12-28 01:07:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-28 01:07:33,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:33,073 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:33,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-28 01:07:33,073 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1593658663, now seen corresponding path program 1 times [2021-12-28 01:07:33,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:33,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751922707] [2021-12-28 01:07:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:33,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2021-12-28 01:07:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 01:07:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-12-28 01:07:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2021-12-28 01:07:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-28 01:07:33,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:33,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751922707] [2021-12-28 01:07:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751922707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522723887] [2021-12-28 01:07:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:33,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:33,256 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) [2021-12-28 01:07:33,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 01:07:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 01:07:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-28 01:07:33,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:33,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522723887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:33,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:33,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2021-12-28 01:07:33,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307753025] [2021-12-28 01:07:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:33,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:07:33,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:07:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-28 01:07:33,827 INFO L87 Difference]: Start difference. First operand 2889 states and 3728 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 7 states have internal predecessors, (118), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-28 01:07:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:34,510 INFO L93 Difference]: Finished difference Result 7495 states and 10062 transitions. [2021-12-28 01:07:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:07:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 7 states have internal predecessors, (118), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 310 [2021-12-28 01:07:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:34,522 INFO L225 Difference]: With dead ends: 7495 [2021-12-28 01:07:34,522 INFO L226 Difference]: Without dead ends: 5067 [2021-12-28 01:07:34,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-28 01:07:34,527 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 437 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:34,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 2668 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:07:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-12-28 01:07:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3421. [2021-12-28 01:07:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 2664 states have (on average 1.2713963963963963) internal successors, (3387), 2747 states have internal predecessors, (3387), 506 states have call successors, (506), 251 states have call predecessors, (506), 250 states have return successors, (505), 429 states have call predecessors, (505), 505 states have call successors, (505) [2021-12-28 01:07:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 4398 transitions. [2021-12-28 01:07:34,816 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 4398 transitions. Word has length 310 [2021-12-28 01:07:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:34,816 INFO L470 AbstractCegarLoop]: Abstraction has 3421 states and 4398 transitions. [2021-12-28 01:07:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 7 states have internal predecessors, (118), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-28 01:07:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 4398 transitions. [2021-12-28 01:07:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-28 01:07:34,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:34,820 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 8, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:34,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:35,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-28 01:07:35,027 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2025975513, now seen corresponding path program 1 times [2021-12-28 01:07:35,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:35,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331567306] [2021-12-28 01:07:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:35,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2021-12-28 01:07:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 01:07:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2021-12-28 01:07:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 295 [2021-12-28 01:07:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-28 01:07:35,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331567306] [2021-12-28 01:07:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331567306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:35,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377097334] [2021-12-28 01:07:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:35,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:35,221 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) [2021-12-28 01:07:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 01:07:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 01:07:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 195 proven. 4 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-28 01:07:35,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-28 01:07:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377097334] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:36,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:36,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2021-12-28 01:07:36,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286234527] [2021-12-28 01:07:36,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:36,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 01:07:36,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 01:07:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:07:36,147 INFO L87 Difference]: Start difference. First operand 3421 states and 4398 transitions. Second operand has 18 states, 18 states have (on average 9.0) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-28 01:07:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:39,854 INFO L93 Difference]: Finished difference Result 9221 states and 12391 transitions. [2021-12-28 01:07:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-28 01:07:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) Word has length 310 [2021-12-28 01:07:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:39,871 INFO L225 Difference]: With dead ends: 9221 [2021-12-28 01:07:39,872 INFO L226 Difference]: Without dead ends: 6237 [2021-12-28 01:07:39,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 677 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=3035, Unknown=0, NotChecked=0, Total=3540 [2021-12-28 01:07:39,878 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 1769 mSDsluCounter, 5033 mSDsCounter, 0 mSdLazyCounter, 5751 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 5661 SdHoareTripleChecker+Invalid, 6521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 5751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:39,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 5661 Invalid, 6521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 5751 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 01:07:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-12-28 01:07:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 3086. [2021-12-28 01:07:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2406 states have (on average 1.2660016625103907) internal successors, (3046), 2479 states have internal predecessors, (3046), 450 states have call successors, (450), 230 states have call predecessors, (450), 229 states have return successors, (449), 383 states have call predecessors, (449), 449 states have call successors, (449) [2021-12-28 01:07:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 3945 transitions. [2021-12-28 01:07:40,147 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 3945 transitions. Word has length 310 [2021-12-28 01:07:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:40,148 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 3945 transitions. [2021-12-28 01:07:40,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 16 states have internal predecessors, (162), 5 states have call successors, (36), 5 states have call predecessors, (36), 7 states have return successors, (36), 6 states have call predecessors, (36), 5 states have call successors, (36) [2021-12-28 01:07:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 3945 transitions. [2021-12-28 01:07:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-28 01:07:40,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:40,150 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 9, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:40,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:40,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-28 01:07:40,369 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:40,369 INFO L85 PathProgramCache]: Analyzing trace with hash 520724073, now seen corresponding path program 1 times [2021-12-28 01:07:40,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:40,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733501336] [2021-12-28 01:07:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:40,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2021-12-28 01:07:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2021-12-28 01:07:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-12-28 01:07:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2021-12-28 01:07:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2021-12-28 01:07:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-12-28 01:07:40,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:40,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733501336] [2021-12-28 01:07:40,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733501336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:40,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:07:40,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:07:40,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123641605] [2021-12-28 01:07:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:40,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:07:40,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:07:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:07:40,477 INFO L87 Difference]: Start difference. First operand 3086 states and 3945 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-28 01:07:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:41,102 INFO L93 Difference]: Finished difference Result 5338 states and 6866 transitions. [2021-12-28 01:07:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:07:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 322 [2021-12-28 01:07:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:41,108 INFO L225 Difference]: With dead ends: 5338 [2021-12-28 01:07:41,108 INFO L226 Difference]: Without dead ends: 2776 [2021-12-28 01:07:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:07:41,112 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 498 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:41,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 968 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:07:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-12-28 01:07:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2446. [2021-12-28 01:07:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 1919 states have (on average 1.2480458572173008) internal successors, (2395), 1971 states have internal predecessors, (2395), 352 states have call successors, (352), 174 states have call predecessors, (352), 174 states have return successors, (352), 300 states have call predecessors, (352), 352 states have call successors, (352) [2021-12-28 01:07:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3099 transitions. [2021-12-28 01:07:41,267 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3099 transitions. Word has length 322 [2021-12-28 01:07:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:41,268 INFO L470 AbstractCegarLoop]: Abstraction has 2446 states and 3099 transitions. [2021-12-28 01:07:41,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-28 01:07:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3099 transitions. [2021-12-28 01:07:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-28 01:07:41,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:41,272 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:41,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-28 01:07:41,272 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -601570683, now seen corresponding path program 1 times [2021-12-28 01:07:41,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:41,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860948220] [2021-12-28 01:07:41,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:41,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2021-12-28 01:07:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2021-12-28 01:07:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-12-28 01:07:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2021-12-28 01:07:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2021-12-28 01:07:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2021-12-28 01:07:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2021-12-28 01:07:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2021-12-28 01:07:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2021-12-28 01:07:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-12-28 01:07:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2021-12-28 01:07:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-12-28 01:07:41,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:41,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860948220] [2021-12-28 01:07:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860948220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424773079] [2021-12-28 01:07:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:41,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:41,456 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) [2021-12-28 01:07:41,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 01:07:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-28 01:07:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 240 proven. 97 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2021-12-28 01:07:42,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:07:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2021-12-28 01:07:43,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424773079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:07:43,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:07:43,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 27 [2021-12-28 01:07:43,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843452150] [2021-12-28 01:07:43,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:07:43,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-28 01:07:43,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-28 01:07:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-12-28 01:07:43,050 INFO L87 Difference]: Start difference. First operand 2446 states and 3099 transitions. Second operand has 27 states, 27 states have (on average 9.74074074074074) internal successors, (263), 23 states have internal predecessors, (263), 8 states have call successors, (65), 9 states have call predecessors, (65), 14 states have return successors, (65), 11 states have call predecessors, (65), 8 states have call successors, (65) [2021-12-28 01:07:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:55,400 INFO L93 Difference]: Finished difference Result 17961 states and 24378 transitions. [2021-12-28 01:07:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-12-28 01:07:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 9.74074074074074) internal successors, (263), 23 states have internal predecessors, (263), 8 states have call successors, (65), 9 states have call predecessors, (65), 14 states have return successors, (65), 11 states have call predecessors, (65), 8 states have call successors, (65) Word has length 371 [2021-12-28 01:07:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:55,433 INFO L225 Difference]: With dead ends: 17961 [2021-12-28 01:07:55,433 INFO L226 Difference]: Without dead ends: 15870 [2021-12-28 01:07:55,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 812 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18210 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5714, Invalid=43348, Unknown=0, NotChecked=0, Total=49062 [2021-12-28 01:07:55,450 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 4300 mSDsluCounter, 8226 mSDsCounter, 0 mSdLazyCounter, 12598 mSolverCounterSat, 3804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4300 SdHoareTripleChecker+Valid, 8963 SdHoareTripleChecker+Invalid, 16402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3804 IncrementalHoareTripleChecker+Valid, 12598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:55,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4300 Valid, 8963 Invalid, 16402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3804 Valid, 12598 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-12-28 01:07:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15870 states. [2021-12-28 01:07:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15870 to 9782. [2021-12-28 01:07:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9782 states, 7477 states have (on average 1.2701618296108064) internal successors, (9497), 7638 states have internal predecessors, (9497), 1586 states have call successors, (1586), 682 states have call predecessors, (1586), 718 states have return successors, (1658), 1461 states have call predecessors, (1658), 1586 states have call successors, (1658) [2021-12-28 01:07:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9782 states to 9782 states and 12741 transitions. [2021-12-28 01:07:56,293 INFO L78 Accepts]: Start accepts. Automaton has 9782 states and 12741 transitions. Word has length 371 [2021-12-28 01:07:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:56,294 INFO L470 AbstractCegarLoop]: Abstraction has 9782 states and 12741 transitions. [2021-12-28 01:07:56,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.74074074074074) internal successors, (263), 23 states have internal predecessors, (263), 8 states have call successors, (65), 9 states have call predecessors, (65), 14 states have return successors, (65), 11 states have call predecessors, (65), 8 states have call successors, (65) [2021-12-28 01:07:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9782 states and 12741 transitions. [2021-12-28 01:07:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-12-28 01:07:56,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:56,310 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:56,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 01:07:56,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-28 01:07:56,532 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:56,532 INFO L85 PathProgramCache]: Analyzing trace with hash -679856538, now seen corresponding path program 1 times [2021-12-28 01:07:56,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566554988] [2021-12-28 01:07:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:56,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:07:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:07:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:07:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:07:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:07:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:07:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:07:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:07:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:07:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:07:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:07:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:07:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:07:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:07:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:07:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:07:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:07:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:07:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 01:07:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-28 01:07:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:07:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-12-28 01:07:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2021-12-28 01:07:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2021-12-28 01:07:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2021-12-28 01:07:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2021-12-28 01:07:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2021-12-28 01:07:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2021-12-28 01:07:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2021-12-28 01:07:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2021-12-28 01:07:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2021-12-28 01:07:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2021-12-28 01:07:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2021-12-28 01:07:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2021-12-28 01:07:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 357 [2021-12-28 01:07:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2021-12-28 01:07:56,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:07:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566554988] [2021-12-28 01:07:56,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566554988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:07:56,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550279873] [2021-12-28 01:07:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:56,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:07:56,639 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) [2021-12-28 01:07:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 01:07:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:07:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 01:07:56,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:07:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2021-12-28 01:07:57,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:07:57,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550279873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:07:57,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:07:57,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-12-28 01:07:57,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344528891] [2021-12-28 01:07:57,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:07:57,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:07:57,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:07:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:07:57,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:07:57,320 INFO L87 Difference]: Start difference. First operand 9782 states and 12741 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-28 01:07:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:07:58,859 INFO L93 Difference]: Finished difference Result 22454 states and 29785 transitions. [2021-12-28 01:07:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:07:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 371 [2021-12-28 01:07:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:07:58,887 INFO L225 Difference]: With dead ends: 22454 [2021-12-28 01:07:58,888 INFO L226 Difference]: Without dead ends: 13606 [2021-12-28 01:07:58,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-12-28 01:07:58,901 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 418 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:07:58,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 2734 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:07:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-12-28 01:07:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 8040. [2021-12-28 01:07:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 6165 states have (on average 1.2472019464720194) internal successors, (7689), 6336 states have internal predecessors, (7689), 1228 states have call successors, (1228), 610 states have call predecessors, (1228), 646 states have return successors, (1276), 1093 states have call predecessors, (1276), 1228 states have call successors, (1276) [2021-12-28 01:07:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 10193 transitions. [2021-12-28 01:07:59,746 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 10193 transitions. Word has length 371 [2021-12-28 01:07:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:07:59,746 INFO L470 AbstractCegarLoop]: Abstraction has 8040 states and 10193 transitions. [2021-12-28 01:07:59,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 3 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-12-28 01:07:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 10193 transitions. [2021-12-28 01:07:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-28 01:07:59,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:07:59,762 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:07:59,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-28 01:07:59,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:07:59,976 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:07:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:07:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash -455111190, now seen corresponding path program 1 times [2021-12-28 01:07:59,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:07:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423334665] [2021-12-28 01:07:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:07:59,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:08:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 01:08:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:08:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 01:08:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 01:08:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:08:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:08:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 01:08:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 01:08:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 01:08:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-28 01:08:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:08:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 01:08:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-28 01:08:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 01:08:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:08:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 01:08:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-28 01:08:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-28 01:08:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-28 01:08:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-28 01:08:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2021-12-28 01:08:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-12-28 01:08:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2021-12-28 01:08:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-12-28 01:08:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2021-12-28 01:08:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2021-12-28 01:08:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2021-12-28 01:08:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2021-12-28 01:08:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2021-12-28 01:08:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2021-12-28 01:08:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2021-12-28 01:08:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2021-12-28 01:08:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2021-12-28 01:08:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2021-12-28 01:08:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2021-12-28 01:08:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-12-28 01:08:00,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:08:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423334665] [2021-12-28 01:08:00,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423334665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:08:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579668055] [2021-12-28 01:08:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:08:00,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:08:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:08:00,202 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) [2021-12-28 01:08:00,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 01:08:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:08:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-28 01:08:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:08:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 206 proven. 121 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-28 01:08:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:08:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 33 proven. 72 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2021-12-28 01:08:01,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579668055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:08:01,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:08:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2021-12-28 01:08:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387552667] [2021-12-28 01:08:01,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:08:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 01:08:01,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:08:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 01:08:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-12-28 01:08:01,657 INFO L87 Difference]: Start difference. First operand 8040 states and 10193 transitions. Second operand has 30 states, 30 states have (on average 8.933333333333334) internal successors, (268), 26 states have internal predecessors, (268), 9 states have call successors, (68), 9 states have call predecessors, (68), 13 states have return successors, (68), 12 states have call predecessors, (68), 9 states have call successors, (68)