./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/systemc/mem_slave_tlm.2.cil.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 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:51:33,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:51:33,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:51:33,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:51:33,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:51:33,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:51:33,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:51:33,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:51:33,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:51:33,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:51:33,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:51:33,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:51:33,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:51:33,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:51:33,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:51:33,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:51:33,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:51:33,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:51:33,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:51:33,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:51:33,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:51:33,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:51:33,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:51:33,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:51:33,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:51:33,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:51:33,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:51:33,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:51:33,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:51:33,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:51:33,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:51:33,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:51:33,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:51:33,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:51:33,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:51:33,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:51:33,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:51:33,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:51:33,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:51:33,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:51:33,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:51:33,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:51:33,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:51:33,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:51:33,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:51:33,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:51:33,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:51:33,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:51:33,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:51:33,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:51:33,555 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:51:33,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:51:33,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:51:33,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:51:33,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:51:33,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:51:33,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:51:33,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:51:33,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:51:33,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:51:33,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:51:33,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:51:33,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:51:33,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:51:33,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:51:33,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:51:33,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:51:33,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:51:33,559 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:51:33,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:51:33,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:51:33,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 [2021-12-14 14:51:33,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:51:33,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:51:33,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:51:33,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:51:33,776 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:51:33,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2021-12-14 14:51:33,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5c6c8bd/edc0acc8f22549668f93fd786c6dbe47/FLAG9b9ddeef5 [2021-12-14 14:51:34,192 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:51:34,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2021-12-14 14:51:34,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5c6c8bd/edc0acc8f22549668f93fd786c6dbe47/FLAG9b9ddeef5 [2021-12-14 14:51:34,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5c6c8bd/edc0acc8f22549668f93fd786c6dbe47 [2021-12-14 14:51:34,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:51:34,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:51:34,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:51:34,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:51:34,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:51:34,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:34,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e63954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34, skipping insertion in model container [2021-12-14 14:51:34,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:34,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:51:34,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:51:34,769 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/systemc/mem_slave_tlm.2.cil.c[646,659] [2021-12-14 14:51:34,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:51:34,889 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:51:34,898 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/systemc/mem_slave_tlm.2.cil.c[646,659] [2021-12-14 14:51:34,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:51:34,946 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:51:34,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34 WrapperNode [2021-12-14 14:51:34,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:51:34,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:51:34,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:51:34,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:51:34,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:34,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,021 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 851 [2021-12-14 14:51:35,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:51:35,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:51:35,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:51:35,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:51:35,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:51:35,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:51:35,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:51:35,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:51:35,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (1/1) ... [2021-12-14 14:51:35,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:51:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:35,100 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) [2021-12-14 14:51:35,106 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 [2021-12-14 14:51:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:51:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:51:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 14:51:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 14:51:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:51:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:51:35,212 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:51:35,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:51:35,717 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:51:35,727 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:51:35,727 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-14 14:51:35,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:51:35 BoogieIcfgContainer [2021-12-14 14:51:35,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:51:35,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:51:35,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:51:35,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:51:35,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:51:34" (1/3) ... [2021-12-14 14:51:35,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:51:35, skipping insertion in model container [2021-12-14 14:51:35,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:34" (2/3) ... [2021-12-14 14:51:35,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:51:35, skipping insertion in model container [2021-12-14 14:51:35,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:51:35" (3/3) ... [2021-12-14 14:51:35,735 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2021-12-14 14:51:35,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:51:35,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:51:35,776 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:51:35,781 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 [2021-12-14 14:51:35,782 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:51:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 14:51:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 14:51:35,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:35,812 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] [2021-12-14 14:51:35,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash 193086899, now seen corresponding path program 1 times [2021-12-14 14:51:35,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253731738] [2021-12-14 14:51:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:35,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:35,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253731738] [2021-12-14 14:51:35,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253731738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:35,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:35,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:35,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018918993] [2021-12-14 14:51:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:35,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:35,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:35,994 INFO L87 Difference]: Start difference. First operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:36,265 INFO L93 Difference]: Finished difference Result 718 states and 1317 transitions. [2021-12-14 14:51:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:36,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-14 14:51:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:36,280 INFO L225 Difference]: With dead ends: 718 [2021-12-14 14:51:36,280 INFO L226 Difference]: Without dead ends: 442 [2021-12-14 14:51:36,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:36,285 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 259 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:36,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 773 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-14 14:51:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 429. [2021-12-14 14:51:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 427 states have internal predecessors, (674), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 679 transitions. [2021-12-14 14:51:36,340 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 679 transitions. Word has length 29 [2021-12-14 14:51:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:36,340 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 679 transitions. [2021-12-14 14:51:36,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 679 transitions. [2021-12-14 14:51:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 14:51:36,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:36,343 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, 1, 1, 1] [2021-12-14 14:51:36,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:51:36,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:36,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1317478755, now seen corresponding path program 1 times [2021-12-14 14:51:36,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:36,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023727729] [2021-12-14 14:51:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:36,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:36,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023727729] [2021-12-14 14:51:36,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023727729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:36,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:36,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515709070] [2021-12-14 14:51:36,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:36,386 INFO L87 Difference]: Start difference. First operand 429 states and 679 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:36,489 INFO L93 Difference]: Finished difference Result 1125 states and 1805 transitions. [2021-12-14 14:51:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-14 14:51:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:36,492 INFO L225 Difference]: With dead ends: 1125 [2021-12-14 14:51:36,492 INFO L226 Difference]: Without dead ends: 710 [2021-12-14 14:51:36,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:36,495 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 322 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:36,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 1016 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:51:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-14 14:51:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 697. [2021-12-14 14:51:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.6266280752532563) internal successors, (1124), 695 states have internal predecessors, (1124), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1129 transitions. [2021-12-14 14:51:36,523 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1129 transitions. Word has length 38 [2021-12-14 14:51:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:36,523 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1129 transitions. [2021-12-14 14:51:36,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1129 transitions. [2021-12-14 14:51:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 14:51:36,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:36,525 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, 1, 1, 1, 1] [2021-12-14 14:51:36,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:51:36,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash 851929906, now seen corresponding path program 1 times [2021-12-14 14:51:36,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:36,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086710355] [2021-12-14 14:51:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:36,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:36,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:36,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086710355] [2021-12-14 14:51:36,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086710355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:36,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:36,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:36,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809578744] [2021-12-14 14:51:36,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:36,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:36,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:36,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:36,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:36,584 INFO L87 Difference]: Start difference. First operand 697 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:36,635 INFO L93 Difference]: Finished difference Result 1761 states and 2852 transitions. [2021-12-14 14:51:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 14:51:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:36,640 INFO L225 Difference]: With dead ends: 1761 [2021-12-14 14:51:36,640 INFO L226 Difference]: Without dead ends: 1089 [2021-12-14 14:51:36,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:36,645 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 349 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 809 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 [2021-12-14 14:51:36,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 809 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-14 14:51:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1078. [2021-12-14 14:51:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1072 states have (on average 1.617537313432836) internal successors, (1734), 1076 states have internal predecessors, (1734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1739 transitions. [2021-12-14 14:51:36,674 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1739 transitions. Word has length 39 [2021-12-14 14:51:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:36,675 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1739 transitions. [2021-12-14 14:51:36,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1739 transitions. [2021-12-14 14:51:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 14:51:36,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:36,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:36,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:51:36,678 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash 18237494, now seen corresponding path program 1 times [2021-12-14 14:51:36,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328807099] [2021-12-14 14:51:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:36,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328807099] [2021-12-14 14:51:36,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328807099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:36,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:36,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:51:36,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987732022] [2021-12-14 14:51:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:36,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:51:36,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:51:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:51:36,744 INFO L87 Difference]: Start difference. First operand 1078 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:37,048 INFO L93 Difference]: Finished difference Result 2970 states and 4767 transitions. [2021-12-14 14:51:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:51:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-14 14:51:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:37,056 INFO L225 Difference]: With dead ends: 2970 [2021-12-14 14:51:37,056 INFO L226 Difference]: Without dead ends: 1917 [2021-12-14 14:51:37,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:51:37,058 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 580 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:37,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1546 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-12-14 14:51:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1684. [2021-12-14 14:51:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1678 states have (on average 1.5911799761620977) internal successors, (2670), 1682 states have internal predecessors, (2670), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2675 transitions. [2021-12-14 14:51:37,110 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2675 transitions. Word has length 48 [2021-12-14 14:51:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:37,111 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2675 transitions. [2021-12-14 14:51:37,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2675 transitions. [2021-12-14 14:51:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 14:51:37,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:37,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:37,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:51:37,112 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799520, now seen corresponding path program 1 times [2021-12-14 14:51:37,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:37,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875209240] [2021-12-14 14:51:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:37,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:37,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:37,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875209240] [2021-12-14 14:51:37,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875209240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:37,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:37,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:51:37,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315248010] [2021-12-14 14:51:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:37,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:51:37,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:51:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:51:37,150 INFO L87 Difference]: Start difference. First operand 1684 states and 2675 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:37,500 INFO L93 Difference]: Finished difference Result 4997 states and 7840 transitions. [2021-12-14 14:51:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:51:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 14:51:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:37,511 INFO L225 Difference]: With dead ends: 4997 [2021-12-14 14:51:37,511 INFO L226 Difference]: Without dead ends: 3332 [2021-12-14 14:51:37,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:51:37,514 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 734 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:37,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1045 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 14:51:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-12-14 14:51:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2962. [2021-12-14 14:51:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2956 states have (on average 1.5639377537212449) internal successors, (4623), 2960 states have internal predecessors, (4623), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4628 transitions. [2021-12-14 14:51:37,595 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4628 transitions. Word has length 53 [2021-12-14 14:51:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:37,598 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4628 transitions. [2021-12-14 14:51:37,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4628 transitions. [2021-12-14 14:51:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-14 14:51:37,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:37,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:37,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:51:37,601 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:37,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984617, now seen corresponding path program 1 times [2021-12-14 14:51:37,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:37,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885485332] [2021-12-14 14:51:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:37,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:37,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885485332] [2021-12-14 14:51:37,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885485332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:37,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:37,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:37,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505144081] [2021-12-14 14:51:37,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:37,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:37,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:37,660 INFO L87 Difference]: Start difference. First operand 2962 states and 4628 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:37,774 INFO L93 Difference]: Finished difference Result 6953 states and 10821 transitions. [2021-12-14 14:51:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-14 14:51:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:37,786 INFO L225 Difference]: With dead ends: 6953 [2021-12-14 14:51:37,787 INFO L226 Difference]: Without dead ends: 4014 [2021-12-14 14:51:37,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:37,791 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 364 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 704 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2021-12-14 14:51:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3830. [2021-12-14 14:51:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3824 states have (on average 1.5431485355648535) internal successors, (5901), 3828 states have internal predecessors, (5901), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5906 transitions. [2021-12-14 14:51:37,910 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5906 transitions. Word has length 53 [2021-12-14 14:51:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:37,911 INFO L470 AbstractCegarLoop]: Abstraction has 3830 states and 5906 transitions. [2021-12-14 14:51:37,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5906 transitions. [2021-12-14 14:51:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 14:51:37,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:37,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:37,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:51:37,913 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1793836096, now seen corresponding path program 1 times [2021-12-14 14:51:37,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:37,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722164080] [2021-12-14 14:51:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:37,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:37,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722164080] [2021-12-14 14:51:37,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722164080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:37,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:37,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:37,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470891626] [2021-12-14 14:51:37,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:37,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:37,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:37,941 INFO L87 Difference]: Start difference. First operand 3830 states and 5906 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:38,218 INFO L93 Difference]: Finished difference Result 9202 states and 14308 transitions. [2021-12-14 14:51:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-14 14:51:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:38,236 INFO L225 Difference]: With dead ends: 9202 [2021-12-14 14:51:38,236 INFO L226 Difference]: Without dead ends: 5395 [2021-12-14 14:51:38,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:38,244 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 246 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:38,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 873 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2021-12-14 14:51:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4638. [2021-12-14 14:51:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4632 states have (on average 1.4853195164075994) internal successors, (6880), 4636 states have internal predecessors, (6880), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 6885 transitions. [2021-12-14 14:51:38,390 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 6885 transitions. Word has length 59 [2021-12-14 14:51:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:38,390 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 6885 transitions. [2021-12-14 14:51:38,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 6885 transitions. [2021-12-14 14:51:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 14:51:38,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:38,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:38,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:51:38,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1530108436, now seen corresponding path program 1 times [2021-12-14 14:51:38,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371903468] [2021-12-14 14:51:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:38,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:38,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371903468] [2021-12-14 14:51:38,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371903468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:38,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:38,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:38,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231364261] [2021-12-14 14:51:38,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:38,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:38,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:38,437 INFO L87 Difference]: Start difference. First operand 4638 states and 6885 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:38,598 INFO L93 Difference]: Finished difference Result 9119 states and 13547 transitions. [2021-12-14 14:51:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 14:51:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:38,611 INFO L225 Difference]: With dead ends: 9119 [2021-12-14 14:51:38,611 INFO L226 Difference]: Without dead ends: 4504 [2021-12-14 14:51:38,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:38,616 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 341 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:38,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 439 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-12-14 14:51:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2021-12-14 14:51:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4498 states have (on average 1.4626500666963094) internal successors, (6579), 4502 states have internal predecessors, (6579), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6584 transitions. [2021-12-14 14:51:38,775 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6584 transitions. Word has length 61 [2021-12-14 14:51:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:38,776 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 6584 transitions. [2021-12-14 14:51:38,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6584 transitions. [2021-12-14 14:51:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 14:51:38,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:38,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:38,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:51:38,778 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1072243498, now seen corresponding path program 1 times [2021-12-14 14:51:38,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:38,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281449929] [2021-12-14 14:51:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:38,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:38,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281449929] [2021-12-14 14:51:38,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281449929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:38,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:38,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:38,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408963459] [2021-12-14 14:51:38,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:38,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:38,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:38,800 INFO L87 Difference]: Start difference. First operand 4504 states and 6584 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:38,964 INFO L93 Difference]: Finished difference Result 9652 states and 14286 transitions. [2021-12-14 14:51:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-14 14:51:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:38,980 INFO L225 Difference]: With dead ends: 9652 [2021-12-14 14:51:38,981 INFO L226 Difference]: Without dead ends: 5171 [2021-12-14 14:51:38,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:38,986 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 305 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:38,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 994 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-12-14 14:51:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 3478. [2021-12-14 14:51:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3472 states have (on average 1.4818548387096775) internal successors, (5145), 3476 states have internal predecessors, (5145), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 5150 transitions. [2021-12-14 14:51:39,104 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 5150 transitions. Word has length 62 [2021-12-14 14:51:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:39,105 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 5150 transitions. [2021-12-14 14:51:39,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 5150 transitions. [2021-12-14 14:51:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 14:51:39,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:39,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:39,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:51:39,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1578233961, now seen corresponding path program 1 times [2021-12-14 14:51:39,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699923025] [2021-12-14 14:51:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:39,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:39,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:39,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699923025] [2021-12-14 14:51:39,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699923025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:39,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:39,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:51:39,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056442783] [2021-12-14 14:51:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:39,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:51:39,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:39,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:51:39,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:39,147 INFO L87 Difference]: Start difference. First operand 3478 states and 5150 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:39,950 INFO L93 Difference]: Finished difference Result 16552 states and 24345 transitions. [2021-12-14 14:51:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 14:51:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 14:51:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:39,972 INFO L225 Difference]: With dead ends: 16552 [2021-12-14 14:51:39,972 INFO L226 Difference]: Without dead ends: 13299 [2021-12-14 14:51:39,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:51:39,978 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 2095 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:39,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 4007 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 14:51:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-12-14 14:51:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 4348. [2021-12-14 14:51:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4342 states have (on average 1.4755872869645326) internal successors, (6407), 4346 states have internal predecessors, (6407), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 6412 transitions. [2021-12-14 14:51:40,177 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 6412 transitions. Word has length 64 [2021-12-14 14:51:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:40,178 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 6412 transitions. [2021-12-14 14:51:40,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 6412 transitions. [2021-12-14 14:51:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 14:51:40,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:40,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:40,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:51:40,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2113614342, now seen corresponding path program 1 times [2021-12-14 14:51:40,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:40,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555801355] [2021-12-14 14:51:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:40,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:40,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:40,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555801355] [2021-12-14 14:51:40,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555801355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:40,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:40,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:51:40,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474500027] [2021-12-14 14:51:40,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:40,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:51:40,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:51:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:51:40,219 INFO L87 Difference]: Start difference. First operand 4348 states and 6412 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:41,341 INFO L93 Difference]: Finished difference Result 30121 states and 44183 transitions. [2021-12-14 14:51:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-14 14:51:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-14 14:51:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:41,387 INFO L225 Difference]: With dead ends: 30121 [2021-12-14 14:51:41,387 INFO L226 Difference]: Without dead ends: 25998 [2021-12-14 14:51:41,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-12-14 14:51:41,400 INFO L933 BasicCegarLoop]: 1869 mSDtfsCounter, 3797 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 8593 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:41,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3797 Valid, 8593 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25998 states. [2021-12-14 14:51:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25998 to 4658. [2021-12-14 14:51:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4652 states have (on average 1.4658211521926052) internal successors, (6819), 4656 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6824 transitions. [2021-12-14 14:51:41,754 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6824 transitions. Word has length 65 [2021-12-14 14:51:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:41,755 INFO L470 AbstractCegarLoop]: Abstraction has 4658 states and 6824 transitions. [2021-12-14 14:51:41,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6824 transitions. [2021-12-14 14:51:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 14:51:41,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:41,757 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 14:51:41,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:51:41,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash 142613235, now seen corresponding path program 1 times [2021-12-14 14:51:41,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:41,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536413617] [2021-12-14 14:51:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:41,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:41,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:41,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536413617] [2021-12-14 14:51:41,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536413617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:41,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:41,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:41,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911508884] [2021-12-14 14:51:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:41,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:41,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:41,776 INFO L87 Difference]: Start difference. First operand 4658 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:42,048 INFO L93 Difference]: Finished difference Result 9803 states and 14328 transitions. [2021-12-14 14:51:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 14:51:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:42,056 INFO L225 Difference]: With dead ends: 9803 [2021-12-14 14:51:42,056 INFO L226 Difference]: Without dead ends: 5166 [2021-12-14 14:51:42,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:42,061 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 131 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:42,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 810 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-14 14:51:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5092. [2021-12-14 14:51:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5086 states have (on average 1.4598898938261895) internal successors, (7425), 5090 states have internal predecessors, (7425), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7430 transitions. [2021-12-14 14:51:42,216 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7430 transitions. Word has length 79 [2021-12-14 14:51:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:42,216 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 7430 transitions. [2021-12-14 14:51:42,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7430 transitions. [2021-12-14 14:51:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 14:51:42,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:42,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:42,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 14:51:42,219 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1699220715, now seen corresponding path program 1 times [2021-12-14 14:51:42,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:42,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935776885] [2021-12-14 14:51:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:42,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:42,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:42,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935776885] [2021-12-14 14:51:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935776885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:42,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:42,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 14:51:42,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551017692] [2021-12-14 14:51:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:42,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:51:42,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:51:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:51:42,241 INFO L87 Difference]: Start difference. First operand 5092 states and 7430 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:42,640 INFO L93 Difference]: Finished difference Result 13610 states and 19696 transitions. [2021-12-14 14:51:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:51:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-14 14:51:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:42,653 INFO L225 Difference]: With dead ends: 13610 [2021-12-14 14:51:42,654 INFO L226 Difference]: Without dead ends: 8417 [2021-12-14 14:51:42,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:51:42,662 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 646 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:42,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 1252 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-12-14 14:51:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 7555. [2021-12-14 14:51:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7555 states, 7549 states have (on average 1.4323751490263612) internal successors, (10813), 7553 states have internal predecessors, (10813), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7555 states to 7555 states and 10818 transitions. [2021-12-14 14:51:42,953 INFO L78 Accepts]: Start accepts. Automaton has 7555 states and 10818 transitions. Word has length 91 [2021-12-14 14:51:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:42,953 INFO L470 AbstractCegarLoop]: Abstraction has 7555 states and 10818 transitions. [2021-12-14 14:51:42,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7555 states and 10818 transitions. [2021-12-14 14:51:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-14 14:51:42,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:42,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:42,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 14:51:42,956 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -414205958, now seen corresponding path program 1 times [2021-12-14 14:51:42,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52272492] [2021-12-14 14:51:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:42,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:42,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52272492] [2021-12-14 14:51:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52272492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:42,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:42,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:42,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328336704] [2021-12-14 14:51:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:42,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:42,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:42,989 INFO L87 Difference]: Start difference. First operand 7555 states and 10818 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:43,138 INFO L93 Difference]: Finished difference Result 10913 states and 15666 transitions. [2021-12-14 14:51:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-14 14:51:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:43,145 INFO L225 Difference]: With dead ends: 10913 [2021-12-14 14:51:43,145 INFO L226 Difference]: Without dead ends: 3361 [2021-12-14 14:51:43,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:43,154 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 335 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:43,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 517 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-12-14 14:51:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 3308. [2021-12-14 14:51:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3302 states have (on average 1.3452453058752272) internal successors, (4442), 3306 states have internal predecessors, (4442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4447 transitions. [2021-12-14 14:51:43,332 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4447 transitions. Word has length 99 [2021-12-14 14:51:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:43,332 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 4447 transitions. [2021-12-14 14:51:43,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4447 transitions. [2021-12-14 14:51:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:51:43,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:43,333 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:43,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 14:51:43,334 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1527373171, now seen corresponding path program 1 times [2021-12-14 14:51:43,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62852861] [2021-12-14 14:51:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:43,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:43,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62852861] [2021-12-14 14:51:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62852861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:43,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:43,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:51:43,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917798464] [2021-12-14 14:51:43,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:51:43,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:51:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:51:43,366 INFO L87 Difference]: Start difference. First operand 3308 states and 4447 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:43,730 INFO L93 Difference]: Finished difference Result 12664 states and 17028 transitions. [2021-12-14 14:51:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:51:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-14 14:51:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:43,747 INFO L225 Difference]: With dead ends: 12664 [2021-12-14 14:51:43,747 INFO L226 Difference]: Without dead ends: 9533 [2021-12-14 14:51:43,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:51:43,756 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 1524 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 3360 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:43,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-12-14 14:51:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 3310. [2021-12-14 14:51:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3304 states have (on average 1.3432203389830508) internal successors, (4438), 3308 states have internal predecessors, (4438), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4443 transitions. [2021-12-14 14:51:43,918 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4443 transitions. Word has length 101 [2021-12-14 14:51:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:43,918 INFO L470 AbstractCegarLoop]: Abstraction has 3310 states and 4443 transitions. [2021-12-14 14:51:43,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4443 transitions. [2021-12-14 14:51:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 14:51:43,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:43,921 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:43,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 14:51:43,921 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -653251672, now seen corresponding path program 1 times [2021-12-14 14:51:43,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373846217] [2021-12-14 14:51:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:43,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:43,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:43,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373846217] [2021-12-14 14:51:43,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373846217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:43,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929286115] [2021-12-14 14:51:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:43,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:43,963 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) [2021-12-14 14:51:43,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:51:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:51:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:44,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:51:44,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929286115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:44,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:51:44,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:51:44,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812003935] [2021-12-14 14:51:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:44,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:44,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:44,314 INFO L87 Difference]: Start difference. First operand 3310 states and 4443 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:44,540 INFO L93 Difference]: Finished difference Result 3945 states and 5288 transitions. [2021-12-14 14:51:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-14 14:51:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:44,547 INFO L225 Difference]: With dead ends: 3945 [2021-12-14 14:51:44,547 INFO L226 Difference]: Without dead ends: 3941 [2021-12-14 14:51:44,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:44,549 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 229 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:44,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 795 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-12-14 14:51:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3891. [2021-12-14 14:51:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3885 states have (on average 1.3397683397683398) internal successors, (5205), 3889 states have internal predecessors, (5205), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5210 transitions. [2021-12-14 14:51:44,751 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5210 transitions. Word has length 103 [2021-12-14 14:51:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:44,752 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 5210 transitions. [2021-12-14 14:51:44,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5210 transitions. [2021-12-14 14:51:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 14:51:44,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:44,754 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:44,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:44,967 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,SelfDestructingSolverStorable15 [2021-12-14 14:51:44,968 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash -182113054, now seen corresponding path program 1 times [2021-12-14 14:51:44,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103599731] [2021-12-14 14:51:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:44,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:51:45,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:45,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103599731] [2021-12-14 14:51:45,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103599731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:45,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399056005] [2021-12-14 14:51:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:45,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:45,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:45,007 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) [2021-12-14 14:51:45,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:51:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:51:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:45,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:51:45,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399056005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:45,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:51:45,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:51:45,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108041329] [2021-12-14 14:51:45,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:45,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:45,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:45,342 INFO L87 Difference]: Start difference. First operand 3891 states and 5210 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:45,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:45,514 INFO L93 Difference]: Finished difference Result 6926 states and 9320 transitions. [2021-12-14 14:51:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-12-14 14:51:45,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:45,519 INFO L225 Difference]: With dead ends: 6926 [2021-12-14 14:51:45,519 INFO L226 Difference]: Without dead ends: 3040 [2021-12-14 14:51:45,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:45,523 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 260 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:45,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 418 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-12-14 14:51:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2818. [2021-12-14 14:51:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.3182788051209104) internal successors, (3707), 2816 states have internal predecessors, (3707), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3712 transitions. [2021-12-14 14:51:45,669 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3712 transitions. Word has length 157 [2021-12-14 14:51:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:45,669 INFO L470 AbstractCegarLoop]: Abstraction has 2818 states and 3712 transitions. [2021-12-14 14:51:45,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3712 transitions. [2021-12-14 14:51:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 14:51:45,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:45,671 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:45,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:45,887 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 [2021-12-14 14:51:45,888 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1837024668, now seen corresponding path program 1 times [2021-12-14 14:51:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433825534] [2021-12-14 14:51:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:45,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:45,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:45,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433825534] [2021-12-14 14:51:45,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433825534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:45,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063561860] [2021-12-14 14:51:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:45,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:45,938 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) [2021-12-14 14:51:45,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:51:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:51:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 14:51:46,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:51:46,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063561860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:46,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:51:46,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:51:46,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633779392] [2021-12-14 14:51:46,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:46,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:46,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:46,201 INFO L87 Difference]: Start difference. First operand 2818 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:46,376 INFO L93 Difference]: Finished difference Result 5464 states and 7237 transitions. [2021-12-14 14:51:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:46,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-12-14 14:51:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:46,381 INFO L225 Difference]: With dead ends: 5464 [2021-12-14 14:51:46,381 INFO L226 Difference]: Without dead ends: 2818 [2021-12-14 14:51:46,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:46,385 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:46,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 390 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-12-14 14:51:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2818. [2021-12-14 14:51:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.2841394025604551) internal successors, (3611), 2816 states have internal predecessors, (3611), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3616 transitions. [2021-12-14 14:51:46,535 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3616 transitions. Word has length 160 [2021-12-14 14:51:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:46,536 INFO L470 AbstractCegarLoop]: Abstraction has 2818 states and 3616 transitions. [2021-12-14 14:51:46,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3616 transitions. [2021-12-14 14:51:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 14:51:46,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:46,538 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:46,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 14:51:46,751 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -321422549, now seen corresponding path program 1 times [2021-12-14 14:51:46,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596343382] [2021-12-14 14:51:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:46,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:46,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596343382] [2021-12-14 14:51:46,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596343382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884466760] [2021-12-14 14:51:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:46,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:46,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:46,796 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) [2021-12-14 14:51:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:51:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:46,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:51:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 14:51:47,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:51:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884466760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:47,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:51:47,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 14:51:47,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735958622] [2021-12-14 14:51:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:47,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:47,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:47,047 INFO L87 Difference]: Start difference. First operand 2818 states and 3616 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:47,429 INFO L93 Difference]: Finished difference Result 6367 states and 8330 transitions. [2021-12-14 14:51:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-14 14:51:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:47,433 INFO L225 Difference]: With dead ends: 6367 [2021-12-14 14:51:47,433 INFO L226 Difference]: Without dead ends: 3721 [2021-12-14 14:51:47,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:51:47,437 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 201 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:47,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 654 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-12-14 14:51:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3633. [2021-12-14 14:51:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3627 states have (on average 1.2514474772539288) internal successors, (4539), 3631 states have internal predecessors, (4539), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 4544 transitions. [2021-12-14 14:51:47,586 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 4544 transitions. Word has length 161 [2021-12-14 14:51:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:47,587 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 4544 transitions. [2021-12-14 14:51:47,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 4544 transitions. [2021-12-14 14:51:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 14:51:47,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:47,588 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:47,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:47,794 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 920589941, now seen corresponding path program 1 times [2021-12-14 14:51:47,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860840388] [2021-12-14 14:51:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:47,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860840388] [2021-12-14 14:51:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860840388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:47,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539352376] [2021-12-14 14:51:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:47,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:47,883 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) [2021-12-14 14:51:47,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:51:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:47,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 14:51:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:48,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:51:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 14:51:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539352376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:51:48,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:51:48,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2021-12-14 14:51:48,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049919323] [2021-12-14 14:51:48,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:51:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 14:51:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 14:51:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:51:48,605 INFO L87 Difference]: Start difference. First operand 3633 states and 4544 transitions. Second operand has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:49,807 INFO L93 Difference]: Finished difference Result 19257 states and 24206 transitions. [2021-12-14 14:51:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 14:51:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-14 14:51:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:49,824 INFO L225 Difference]: With dead ends: 19257 [2021-12-14 14:51:49,824 INFO L226 Difference]: Without dead ends: 15796 [2021-12-14 14:51:49,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 14:51:49,830 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 5037 mSDsluCounter, 4816 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5037 SdHoareTripleChecker+Valid, 5675 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:49,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5037 Valid, 5675 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-14 14:51:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 5146. [2021-12-14 14:51:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5140 states have (on average 1.2560311284046692) internal successors, (6456), 5144 states have internal predecessors, (6456), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 6461 transitions. [2021-12-14 14:51:50,117 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 6461 transitions. Word has length 163 [2021-12-14 14:51:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 6461 transitions. [2021-12-14 14:51:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 6461 transitions. [2021-12-14 14:51:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-14 14:51:50,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:50,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 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, 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] [2021-12-14 14:51:50,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:50,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:50,335 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -763703227, now seen corresponding path program 1 times [2021-12-14 14:51:50,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:50,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454650740] [2021-12-14 14:51:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:50,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 103 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:51:50,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454650740] [2021-12-14 14:51:50,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454650740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550485349] [2021-12-14 14:51:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:50,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:50,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:50,422 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) [2021-12-14 14:51:50,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:51:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 14:51:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:51:50,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:51:50,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550485349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:50,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:51:50,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-12-14 14:51:50,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15288648] [2021-12-14 14:51:50,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:50,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:51:50,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:51:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:51:50,927 INFO L87 Difference]: Start difference. First operand 5146 states and 6461 transitions. Second operand has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:51,389 INFO L93 Difference]: Finished difference Result 11313 states and 14214 transitions. [2021-12-14 14:51:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:51:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-12-14 14:51:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:51,397 INFO L225 Difference]: With dead ends: 11313 [2021-12-14 14:51:51,397 INFO L226 Difference]: Without dead ends: 6336 [2021-12-14 14:51:51,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:51:51,404 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 1387 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:51,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 2260 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:51:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-12-14 14:51:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5015. [2021-12-14 14:51:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5009 states have (on average 1.2537432621281692) internal successors, (6280), 5013 states have internal predecessors, (6280), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 6285 transitions. [2021-12-14 14:51:51,657 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 6285 transitions. Word has length 263 [2021-12-14 14:51:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 5015 states and 6285 transitions. [2021-12-14 14:51:51,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 6285 transitions. [2021-12-14 14:51:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-14 14:51:51,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:51,660 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 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] [2021-12-14 14:51:51,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:51,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:51,895 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1019295115, now seen corresponding path program 1 times [2021-12-14 14:51:51,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:51,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352053318] [2021-12-14 14:51:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:51,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 14:51:51,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352053318] [2021-12-14 14:51:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352053318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:51,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:51:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536263956] [2021-12-14 14:51:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:51:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:51:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:51,960 INFO L87 Difference]: Start difference. First operand 5015 states and 6285 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:52,085 INFO L93 Difference]: Finished difference Result 5886 states and 7262 transitions. [2021-12-14 14:51:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:51:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-12-14 14:51:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:52,087 INFO L225 Difference]: With dead ends: 5886 [2021-12-14 14:51:52,087 INFO L226 Difference]: Without dead ends: 924 [2021-12-14 14:51:52,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:51:52,091 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 130 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:52,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 388 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:51:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-14 14:51:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 921. [2021-12-14 14:51:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 917 states have (on average 1.0828789531079608) internal successors, (993), 919 states have internal predecessors, (993), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 996 transitions. [2021-12-14 14:51:52,144 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 996 transitions. Word has length 264 [2021-12-14 14:51:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:52,144 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 996 transitions. [2021-12-14 14:51:52,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 996 transitions. [2021-12-14 14:51:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-14 14:51:52,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:52,146 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 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] [2021-12-14 14:51:52,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 14:51:52,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:52,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:52,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1686235295, now seen corresponding path program 1 times [2021-12-14 14:51:52,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:52,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634990772] [2021-12-14 14:51:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:52,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 14:51:52,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634990772] [2021-12-14 14:51:52,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634990772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:52,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:52,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:51:52,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048183439] [2021-12-14 14:51:52,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:52,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:51:52,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:51:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:51:52,208 INFO L87 Difference]: Start difference. First operand 921 states and 996 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:52,405 INFO L93 Difference]: Finished difference Result 1898 states and 2058 transitions. [2021-12-14 14:51:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:51:52,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-12-14 14:51:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:52,407 INFO L225 Difference]: With dead ends: 1898 [2021-12-14 14:51:52,407 INFO L226 Difference]: Without dead ends: 1597 [2021-12-14 14:51:52,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:51:52,408 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 863 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:52,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 2389 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:51:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-14 14:51:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 919. [2021-12-14 14:51:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 915 states have (on average 1.0786885245901638) internal successors, (987), 917 states have internal predecessors, (987), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 990 transitions. [2021-12-14 14:51:52,462 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 990 transitions. Word has length 265 [2021-12-14 14:51:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:52,462 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 990 transitions. [2021-12-14 14:51:52,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 990 transitions. [2021-12-14 14:51:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-14 14:51:52,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:52,464 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 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] [2021-12-14 14:51:52,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 14:51:52,464 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -232946174, now seen corresponding path program 1 times [2021-12-14 14:51:52,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910321720] [2021-12-14 14:51:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:52,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-14 14:51:52,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910321720] [2021-12-14 14:51:52,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910321720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:51:52,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:51:52,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:51:52,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505671779] [2021-12-14 14:51:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:51:52,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:51:52,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:51:52,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:51:52,502 INFO L87 Difference]: Start difference. First operand 919 states and 990 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:52,611 INFO L93 Difference]: Finished difference Result 1448 states and 1564 transitions. [2021-12-14 14:51:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:51:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-12-14 14:51:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:52,613 INFO L225 Difference]: With dead ends: 1448 [2021-12-14 14:51:52,614 INFO L226 Difference]: Without dead ends: 1145 [2021-12-14 14:51:52,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:51:52,615 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 428 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:52,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 913 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:51:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-14 14:51:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 902. [2021-12-14 14:51:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.0622914349276975) internal successors, (955), 900 states have internal predecessors, (955), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 957 transitions. [2021-12-14 14:51:52,669 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 957 transitions. Word has length 266 [2021-12-14 14:51:52,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:52,669 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 957 transitions. [2021-12-14 14:51:52,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:52,669 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 957 transitions. [2021-12-14 14:51:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-14 14:51:52,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:52,671 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:52,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 14:51:52,672 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1219154648, now seen corresponding path program 1 times [2021-12-14 14:51:52,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:52,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001775236] [2021-12-14 14:51:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:52,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 38 proven. 142 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-14 14:51:52,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001775236] [2021-12-14 14:51:52,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001775236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088684725] [2021-12-14 14:51:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:52,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:52,928 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) [2021-12-14 14:51:52,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:51:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:53,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 14:51:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 40 proven. 123 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-14 14:51:53,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:51:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 148 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-14 14:51:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088684725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:51:54,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:51:54,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-14 14:51:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601853368] [2021-12-14 14:51:54,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:51:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 14:51:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 14:51:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-14 14:51:54,539 INFO L87 Difference]: Start difference. First operand 902 states and 957 transitions. Second operand has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:55,193 INFO L93 Difference]: Finished difference Result 1224 states and 1303 transitions. [2021-12-14 14:51:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 14:51:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-12-14 14:51:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:55,195 INFO L225 Difference]: With dead ends: 1224 [2021-12-14 14:51:55,196 INFO L226 Difference]: Without dead ends: 1221 [2021-12-14 14:51:55,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 643 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=2269, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 14:51:55,197 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 2720 mSDsluCounter, 6589 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 6978 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:55,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 6978 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:51:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-14 14:51:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 902. [2021-12-14 14:51:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.061179087875417) internal successors, (954), 900 states have internal predecessors, (954), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 956 transitions. [2021-12-14 14:51:55,256 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 956 transitions. Word has length 325 [2021-12-14 14:51:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:55,256 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 956 transitions. [2021-12-14 14:51:55,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 956 transitions. [2021-12-14 14:51:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-14 14:51:55,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:55,258 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:51:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:55,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:55,478 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash 200109303, now seen corresponding path program 1 times [2021-12-14 14:51:55,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:55,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163804664] [2021-12-14 14:51:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-14 14:51:55,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163804664] [2021-12-14 14:51:55,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163804664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:55,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237754830] [2021-12-14 14:51:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:55,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:55,596 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) [2021-12-14 14:51:55,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 14:51:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 14:51:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-14 14:51:56,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:51:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-14 14:51:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237754830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:51:56,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:51:56,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2021-12-14 14:51:56,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216437121] [2021-12-14 14:51:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:51:56,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 14:51:56,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:56,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 14:51:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:51:56,703 INFO L87 Difference]: Start difference. First operand 902 states and 956 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:51:56,959 INFO L93 Difference]: Finished difference Result 1252 states and 1331 transitions. [2021-12-14 14:51:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 14:51:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2021-12-14 14:51:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:51:56,961 INFO L225 Difference]: With dead ends: 1252 [2021-12-14 14:51:56,961 INFO L226 Difference]: Without dead ends: 1148 [2021-12-14 14:51:56,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 748 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-14 14:51:56,962 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 928 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:51:56,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 3196 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:51:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-12-14 14:51:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2021-12-14 14:51:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 899 states have (on average 1.0567296996662958) internal successors, (950), 899 states have internal predecessors, (950), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 951 transitions. [2021-12-14 14:51:57,023 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 951 transitions. Word has length 372 [2021-12-14 14:51:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:51:57,023 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 951 transitions. [2021-12-14 14:51:57,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:51:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 951 transitions. [2021-12-14 14:51:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-12-14 14:51:57,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:51:57,026 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2021-12-14 14:51:57,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 14:51:57,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-14 14:51:57,232 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:51:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:51:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2022630306, now seen corresponding path program 1 times [2021-12-14 14:51:57,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:51:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359482384] [2021-12-14 14:51:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:57,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:51:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 73 proven. 357 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:51:57,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:51:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359482384] [2021-12-14 14:51:57,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359482384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:51:57,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662202567] [2021-12-14 14:51:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:51:57,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:51:57,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:51:57,527 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) [2021-12-14 14:51:57,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 14:51:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:51:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-14 14:51:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:51:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 91 proven. 339 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:51:58,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:51:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 20 proven. 410 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 14:51:59,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662202567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:51:59,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 14:51:59,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 35 [2021-12-14 14:51:59,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578705115] [2021-12-14 14:51:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 14:51:59,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 14:51:59,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:51:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 14:51:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 14:51:59,692 INFO L87 Difference]: Start difference. First operand 901 states and 951 transitions. Second operand has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:52:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:00,596 INFO L93 Difference]: Finished difference Result 1148 states and 1216 transitions. [2021-12-14 14:52:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-14 14:52:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2021-12-14 14:52:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:00,597 INFO L225 Difference]: With dead ends: 1148 [2021-12-14 14:52:00,597 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 14:52:00,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 866 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=4145, Unknown=0, NotChecked=0, Total=4692 [2021-12-14 14:52:00,599 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 3108 mSDsluCounter, 11297 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 11852 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:00,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 11852 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 14:52:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 14:52:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 14:52:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:52:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 14:52:00,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 433 [2021-12-14 14:52:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 14:52:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:52:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 14:52:00,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 14:52:00,603 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 14:52:00,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:00,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-14 14:52:00,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.