./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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.5.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 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:32:21,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:32:21,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:32:21,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:32:21,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:32:21,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:32:21,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:32:22,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:32:22,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:32:22,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:32:22,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:32:22,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:32:22,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:32:22,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:32:22,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:32:22,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:32:22,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:32:22,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:32:22,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:32:22,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:32:22,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:32:22,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:32:22,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:32:22,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:32:22,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:32:22,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:32:22,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:32:22,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:32:22,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:32:22,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:32:22,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:32:22,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:32:22,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:32:22,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:32:22,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:32:22,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:32:22,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:32:22,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:32:22,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:32:22,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:32:22,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:32:22,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:32:22,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:32:22,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:32:22,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:32:22,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:32:22,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:32:22,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:32:22,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:32:22,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:32:22,085 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:32:22,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:32:22,086 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:32:22,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:32:22,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:32:22,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:32:22,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:32:22,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:32:22,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:32:22,088 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:32:22,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:32:22,088 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:32:22,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:32:22,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:32:22,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:32:22,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:32:22,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:32:22,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:32:22,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:32:22,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:32:22,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:32:22,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:32:22,092 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:32:22,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:32:22,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:32:22,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:32:22,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 [2021-12-17 15:32:22,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:32:22,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:32:22,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:32:22,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:32:22,366 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:32:22,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-12-17 15:32:22,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f371c4285/66c1d874bdc64c0cb2a275656f00c3c7/FLAG38484bad3 [2021-12-17 15:32:22,827 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:32:22,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-12-17 15:32:22,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f371c4285/66c1d874bdc64c0cb2a275656f00c3c7/FLAG38484bad3 [2021-12-17 15:32:23,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f371c4285/66c1d874bdc64c0cb2a275656f00c3c7 [2021-12-17 15:32:23,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:32:23,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:32:23,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:32:23,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:32:23,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:32:23,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f1ee03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23, skipping insertion in model container [2021-12-17 15:32:23,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:32:23,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:32:23,429 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.5.cil.c[646,659] [2021-12-17 15:32:23,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:32:23,560 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:32:23,569 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.5.cil.c[646,659] [2021-12-17 15:32:23,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:32:23,628 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:32:23,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23 WrapperNode [2021-12-17 15:32:23,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:32:23,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:32:23,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:32:23,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:32:23,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,698 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 866 [2021-12-17 15:32:23,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:32:23,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:32:23,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:32:23,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:32:23,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:32:23,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:32:23,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:32:23,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:32:23,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (1/1) ... [2021-12-17 15:32:23,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:32:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:23,828 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) [2021-12-17 15:32:23,850 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 [2021-12-17 15:32:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:32:23,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:32:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 15:32:23,877 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 15:32:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:32:23,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:32:24,004 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:32:24,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:32:24,579 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:32:24,587 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:32:24,588 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-17 15:32:24,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:32:24 BoogieIcfgContainer [2021-12-17 15:32:24,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:32:24,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:32:24,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:32:24,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:32:24,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:32:23" (1/3) ... [2021-12-17 15:32:24,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bf6a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:32:24, skipping insertion in model container [2021-12-17 15:32:24,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:23" (2/3) ... [2021-12-17 15:32:24,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bf6a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:32:24, skipping insertion in model container [2021-12-17 15:32:24,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:32:24" (3/3) ... [2021-12-17 15:32:24,596 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.5.cil.c [2021-12-17 15:32:24,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:32:24,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:32:24,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:32:24,675 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 [2021-12-17 15:32:24,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:32:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 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) [2021-12-17 15:32:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 15:32:24,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:24,737 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] [2021-12-17 15:32:24,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 193087859, now seen corresponding path program 1 times [2021-12-17 15:32:24,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:24,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854907657] [2021-12-17 15:32:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:24,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:24,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:24,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854907657] [2021-12-17 15:32:24,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854907657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:24,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:24,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059099136] [2021-12-17 15:32:24,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:24,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:24,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:24,994 INFO L87 Difference]: Start difference. First operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 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) [2021-12-17 15:32:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:25,349 INFO L93 Difference]: Finished difference Result 736 states and 1353 transitions. [2021-12-17 15:32:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:25,352 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 [2021-12-17 15:32:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:25,368 INFO L225 Difference]: With dead ends: 736 [2021-12-17 15:32:25,369 INFO L226 Difference]: Without dead ends: 454 [2021-12-17 15:32:25,374 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 [2021-12-17 15:32:25,379 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 271 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 797 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 [2021-12-17 15:32:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 797 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-17 15:32:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 441. [2021-12-17 15:32:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.6045977011494252) internal successors, (698), 439 states have internal predecessors, (698), 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) [2021-12-17 15:32:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 703 transitions. [2021-12-17 15:32:25,438 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 703 transitions. Word has length 29 [2021-12-17 15:32:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:25,439 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 703 transitions. [2021-12-17 15:32:25,439 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) [2021-12-17 15:32:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 703 transitions. [2021-12-17 15:32:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 15:32:25,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:25,442 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] [2021-12-17 15:32:25,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:32:25,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1865699697, now seen corresponding path program 1 times [2021-12-17 15:32:25,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603205330] [2021-12-17 15:32:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:25,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:25,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:25,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603205330] [2021-12-17 15:32:25,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603205330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:25,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:25,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:25,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998684554] [2021-12-17 15:32:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:25,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:25,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:25,508 INFO L87 Difference]: Start difference. First operand 441 states and 703 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-12-17 15:32:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:25,623 INFO L93 Difference]: Finished difference Result 1161 states and 1877 transitions. [2021-12-17 15:32:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 41 [2021-12-17 15:32:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:25,627 INFO L225 Difference]: With dead ends: 1161 [2021-12-17 15:32:25,627 INFO L226 Difference]: Without dead ends: 734 [2021-12-17 15:32:25,632 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 [2021-12-17 15:32:25,634 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 334 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1040 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 [2021-12-17 15:32:25,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1040 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-12-17 15:32:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 721. [2021-12-17 15:32:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 715 states have (on average 1.6391608391608392) internal successors, (1172), 719 states have internal predecessors, (1172), 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) [2021-12-17 15:32:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1177 transitions. [2021-12-17 15:32:25,702 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1177 transitions. Word has length 41 [2021-12-17 15:32:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:25,703 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1177 transitions. [2021-12-17 15:32:25,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-12-17 15:32:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1177 transitions. [2021-12-17 15:32:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 15:32:25,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:25,712 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] [2021-12-17 15:32:25,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:32:25,712 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:25,714 INFO L85 PathProgramCache]: Analyzing trace with hash 614817242, now seen corresponding path program 1 times [2021-12-17 15:32:25,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907518151] [2021-12-17 15:32:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:25,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:25,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907518151] [2021-12-17 15:32:25,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907518151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:25,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:25,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:25,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396427497] [2021-12-17 15:32:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:25,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:25,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:25,776 INFO L87 Difference]: Start difference. First operand 721 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-12-17 15:32:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:25,819 INFO L93 Difference]: Finished difference Result 1809 states and 2948 transitions. [2021-12-17 15:32:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 42 [2021-12-17 15:32:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:25,826 INFO L225 Difference]: With dead ends: 1809 [2021-12-17 15:32:25,827 INFO L226 Difference]: Without dead ends: 1113 [2021-12-17 15:32:25,828 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 [2021-12-17 15:32:25,832 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 361 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 821 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 [2021-12-17 15:32:25,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 821 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-12-17 15:32:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1102. [2021-12-17 15:32:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.6259124087591241) internal successors, (1782), 1100 states have internal predecessors, (1782), 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) [2021-12-17 15:32:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1787 transitions. [2021-12-17 15:32:25,865 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1787 transitions. Word has length 42 [2021-12-17 15:32:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:25,866 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1787 transitions. [2021-12-17 15:32:25,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-12-17 15:32:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1787 transitions. [2021-12-17 15:32:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 15:32:25,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:25,870 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] [2021-12-17 15:32:25,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:32:25,871 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2063798548, now seen corresponding path program 1 times [2021-12-17 15:32:25,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:25,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972722949] [2021-12-17 15:32:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:25,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:25,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:25,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972722949] [2021-12-17 15:32:25,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972722949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:25,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:25,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:32:25,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441124514] [2021-12-17 15:32:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:25,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:32:25,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:32:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:32:25,939 INFO L87 Difference]: Start difference. First operand 1102 states and 1787 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) [2021-12-17 15:32:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:26,236 INFO L93 Difference]: Finished difference Result 3042 states and 4911 transitions. [2021-12-17 15:32:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:32:26,237 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 [2021-12-17 15:32:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:26,245 INFO L225 Difference]: With dead ends: 3042 [2021-12-17 15:32:26,245 INFO L226 Difference]: Without dead ends: 1965 [2021-12-17 15:32:26,247 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 [2021-12-17 15:32:26,253 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 592 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1606 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 [2021-12-17 15:32:26,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1606 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-12-17 15:32:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1732. [2021-12-17 15:32:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1726 states have (on average 1.6025492468134415) internal successors, (2766), 1730 states have internal predecessors, (2766), 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) [2021-12-17 15:32:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2771 transitions. [2021-12-17 15:32:26,301 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2771 transitions. Word has length 48 [2021-12-17 15:32:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:26,302 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 2771 transitions. [2021-12-17 15:32:26,302 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) [2021-12-17 15:32:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2771 transitions. [2021-12-17 15:32:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 15:32:26,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:26,304 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] [2021-12-17 15:32:26,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:32:26,305 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798560, now seen corresponding path program 1 times [2021-12-17 15:32:26,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:26,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054402432] [2021-12-17 15:32:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:26,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:26,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054402432] [2021-12-17 15:32:26,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054402432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:26,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:26,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:32:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504058340] [2021-12-17 15:32:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:32:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:32:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:32:26,389 INFO L87 Difference]: Start difference. First operand 1732 states and 2771 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) [2021-12-17 15:32:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:26,752 INFO L93 Difference]: Finished difference Result 5153 states and 8152 transitions. [2021-12-17 15:32:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:32:26,753 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 [2021-12-17 15:32:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:26,766 INFO L225 Difference]: With dead ends: 5153 [2021-12-17 15:32:26,766 INFO L226 Difference]: Without dead ends: 3440 [2021-12-17 15:32:26,770 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 [2021-12-17 15:32:26,771 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 758 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1088 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 [2021-12-17 15:32:26,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1088 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:32:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-12-17 15:32:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3058. [2021-12-17 15:32:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3052 states have (on average 1.577653997378768) internal successors, (4815), 3056 states have internal predecessors, (4815), 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) [2021-12-17 15:32:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 4820 transitions. [2021-12-17 15:32:26,873 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 4820 transitions. Word has length 53 [2021-12-17 15:32:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:26,873 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 4820 transitions. [2021-12-17 15:32:26,874 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) [2021-12-17 15:32:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 4820 transitions. [2021-12-17 15:32:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 15:32:26,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:26,875 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] [2021-12-17 15:32:26,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:32:26,876 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985577, now seen corresponding path program 1 times [2021-12-17 15:32:26,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:26,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348664599] [2021-12-17 15:32:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:26,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:26,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348664599] [2021-12-17 15:32:26,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348664599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:26,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:26,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81392870] [2021-12-17 15:32:26,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:26,910 INFO L87 Difference]: Start difference. First operand 3058 states and 4820 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) [2021-12-17 15:32:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:27,033 INFO L93 Difference]: Finished difference Result 7193 states and 11301 transitions. [2021-12-17 15:32:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:27,033 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 [2021-12-17 15:32:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:27,048 INFO L225 Difference]: With dead ends: 7193 [2021-12-17 15:32:27,048 INFO L226 Difference]: Without dead ends: 4158 [2021-12-17 15:32:27,054 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 [2021-12-17 15:32:27,055 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 376 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 728 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 [2021-12-17 15:32:27,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 728 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2021-12-17 15:32:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3974. [2021-12-17 15:32:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3968 states have (on average 1.5597278225806452) internal successors, (6189), 3972 states have internal predecessors, (6189), 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) [2021-12-17 15:32:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 6194 transitions. [2021-12-17 15:32:27,189 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 6194 transitions. Word has length 53 [2021-12-17 15:32:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:27,192 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 6194 transitions. [2021-12-17 15:32:27,192 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) [2021-12-17 15:32:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 6194 transitions. [2021-12-17 15:32:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 15:32:27,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:27,194 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] [2021-12-17 15:32:27,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:32:27,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1920778764, now seen corresponding path program 1 times [2021-12-17 15:32:27,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:27,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641347277] [2021-12-17 15:32:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:27,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:27,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641347277] [2021-12-17 15:32:27,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641347277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:27,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:27,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:27,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459984638] [2021-12-17 15:32:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:27,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:27,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:27,245 INFO L87 Difference]: Start difference. First operand 3974 states and 6194 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) [2021-12-17 15:32:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:27,555 INFO L93 Difference]: Finished difference Result 9562 states and 15028 transitions. [2021-12-17 15:32:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:27,556 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 [2021-12-17 15:32:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:27,575 INFO L225 Difference]: With dead ends: 9562 [2021-12-17 15:32:27,575 INFO L226 Difference]: Without dead ends: 5611 [2021-12-17 15:32:27,581 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 [2021-12-17 15:32:27,583 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 258 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 897 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 [2021-12-17 15:32:27,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 897 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-12-17 15:32:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4818. [2021-12-17 15:32:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4812 states have (on average 1.5045719035743974) internal successors, (7240), 4816 states have internal predecessors, (7240), 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) [2021-12-17 15:32:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 7245 transitions. [2021-12-17 15:32:27,753 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 7245 transitions. Word has length 62 [2021-12-17 15:32:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:27,753 INFO L470 AbstractCegarLoop]: Abstraction has 4818 states and 7245 transitions. [2021-12-17 15:32:27,754 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) [2021-12-17 15:32:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 7245 transitions. [2021-12-17 15:32:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 15:32:27,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:27,757 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] [2021-12-17 15:32:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:32:27,758 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:27,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1239764768, now seen corresponding path program 1 times [2021-12-17 15:32:27,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:27,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626142815] [2021-12-17 15:32:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:27,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:27,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:27,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626142815] [2021-12-17 15:32:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626142815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:27,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:27,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:27,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290401379] [2021-12-17 15:32:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:27,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:27,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:27,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:27,819 INFO L87 Difference]: Start difference. First operand 4818 states and 7245 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2021-12-17 15:32:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:27,976 INFO L93 Difference]: Finished difference Result 9479 states and 14267 transitions. [2021-12-17 15:32:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 [2021-12-17 15:32:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:27,993 INFO L225 Difference]: With dead ends: 9479 [2021-12-17 15:32:27,993 INFO L226 Difference]: Without dead ends: 4684 [2021-12-17 15:32:28,000 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 [2021-12-17 15:32:28,001 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 353 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 451 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 [2021-12-17 15:32:28,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 451 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-12-17 15:32:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2021-12-17 15:32:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4678 states have (on average 1.4833262077811031) internal successors, (6939), 4682 states have internal predecessors, (6939), 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) [2021-12-17 15:32:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 6944 transitions. [2021-12-17 15:32:28,163 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 6944 transitions. Word has length 64 [2021-12-17 15:32:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:28,163 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 6944 transitions. [2021-12-17 15:32:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2021-12-17 15:32:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 6944 transitions. [2021-12-17 15:32:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 15:32:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:28,166 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] [2021-12-17 15:32:28,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:32:28,167 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1801528906, now seen corresponding path program 1 times [2021-12-17 15:32:28,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966936421] [2021-12-17 15:32:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:28,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:28,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:28,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966936421] [2021-12-17 15:32:28,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966936421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:28,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:28,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:28,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599733241] [2021-12-17 15:32:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:28,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:28,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:28,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:28,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:28,193 INFO L87 Difference]: Start difference. First operand 4684 states and 6944 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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) [2021-12-17 15:32:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:28,371 INFO L93 Difference]: Finished difference Result 10012 states and 15006 transitions. [2021-12-17 15:32:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 [2021-12-17 15:32:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:28,400 INFO L225 Difference]: With dead ends: 10012 [2021-12-17 15:32:28,400 INFO L226 Difference]: Without dead ends: 5351 [2021-12-17 15:32:28,407 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 [2021-12-17 15:32:28,409 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 317 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1018 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 [2021-12-17 15:32:28,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1018 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-12-17 15:32:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3586. [2021-12-17 15:32:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3580 states have (on average 1.497486033519553) internal successors, (5361), 3584 states have internal predecessors, (5361), 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) [2021-12-17 15:32:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5366 transitions. [2021-12-17 15:32:28,542 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5366 transitions. Word has length 65 [2021-12-17 15:32:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:28,543 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 5366 transitions. [2021-12-17 15:32:28,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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) [2021-12-17 15:32:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5366 transitions. [2021-12-17 15:32:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:32:28,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:28,545 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, 1, 1] [2021-12-17 15:32:28,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:32:28,546 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -106317501, now seen corresponding path program 1 times [2021-12-17 15:32:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:28,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061559409] [2021-12-17 15:32:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:28,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:28,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:28,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061559409] [2021-12-17 15:32:28,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061559409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:28,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:28,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:32:28,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040989216] [2021-12-17 15:32:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:28,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:32:28,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:32:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:28,629 INFO L87 Difference]: Start difference. First operand 3586 states and 5366 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-12-17 15:32:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:29,404 INFO L93 Difference]: Finished difference Result 16912 states and 25065 transitions. [2021-12-17 15:32:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:32:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 67 [2021-12-17 15:32:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:29,431 INFO L225 Difference]: With dead ends: 16912 [2021-12-17 15:32:29,431 INFO L226 Difference]: Without dead ends: 13551 [2021-12-17 15:32:29,438 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 [2021-12-17 15:32:29,439 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 2149 mSDsluCounter, 2983 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 4061 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:29,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 4061 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:32:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2021-12-17 15:32:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 4456. [2021-12-17 15:32:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 4450 states have (on average 1.4883146067415731) internal successors, (6623), 4454 states have internal predecessors, (6623), 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) [2021-12-17 15:32:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6628 transitions. [2021-12-17 15:32:29,674 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6628 transitions. Word has length 67 [2021-12-17 15:32:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:29,675 INFO L470 AbstractCegarLoop]: Abstraction has 4456 states and 6628 transitions. [2021-12-17 15:32:29,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-12-17 15:32:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6628 transitions. [2021-12-17 15:32:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 15:32:29,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:29,677 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, 1, 1, 1] [2021-12-17 15:32:29,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:32:29,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1482385041, now seen corresponding path program 1 times [2021-12-17 15:32:29,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:29,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427725266] [2021-12-17 15:32:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:29,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:29,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427725266] [2021-12-17 15:32:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427725266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:29,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:32:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014538343] [2021-12-17 15:32:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:29,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:32:29,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:29,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:32:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:32:29,725 INFO L87 Difference]: Start difference. First operand 4456 states and 6628 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-12-17 15:32:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:30,923 INFO L93 Difference]: Finished difference Result 30607 states and 45155 transitions. [2021-12-17 15:32:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 15:32:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 68 [2021-12-17 15:32:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:30,986 INFO L225 Difference]: With dead ends: 30607 [2021-12-17 15:32:30,987 INFO L226 Difference]: Without dead ends: 26376 [2021-12-17 15:32:30,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:32:31,000 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 3845 mSDsluCounter, 6826 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3845 SdHoareTripleChecker+Valid, 8719 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:31,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3845 Valid, 8719 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26376 states. [2021-12-17 15:32:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26376 to 4766. [2021-12-17 15:32:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4766 states, 4760 states have (on average 1.4779411764705883) internal successors, (7035), 4764 states have internal predecessors, (7035), 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) [2021-12-17 15:32:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 7040 transitions. [2021-12-17 15:32:31,352 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 7040 transitions. Word has length 68 [2021-12-17 15:32:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:31,353 INFO L470 AbstractCegarLoop]: Abstraction has 4766 states and 7040 transitions. [2021-12-17 15:32:31,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2021-12-17 15:32:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 7040 transitions. [2021-12-17 15:32:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:32:31,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:31,355 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] [2021-12-17 15:32:31,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:32:31,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 810462579, now seen corresponding path program 1 times [2021-12-17 15:32:31,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:31,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890414107] [2021-12-17 15:32:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:31,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:31,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890414107] [2021-12-17 15:32:31,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890414107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:31,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:31,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:31,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966515859] [2021-12-17 15:32:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:31,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:31,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:31,394 INFO L87 Difference]: Start difference. First operand 4766 states and 7040 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) [2021-12-17 15:32:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:31,659 INFO L93 Difference]: Finished difference Result 10055 states and 14832 transitions. [2021-12-17 15:32:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:31,660 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 [2021-12-17 15:32:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:31,670 INFO L225 Difference]: With dead ends: 10055 [2021-12-17 15:32:31,671 INFO L226 Difference]: Without dead ends: 5310 [2021-12-17 15:32:31,679 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 [2021-12-17 15:32:31,680 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 143 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 834 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 [2021-12-17 15:32:31,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 834 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2021-12-17 15:32:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5236. [2021-12-17 15:32:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5230 states have (on average 1.4747609942638624) internal successors, (7713), 5234 states have internal predecessors, (7713), 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) [2021-12-17 15:32:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 7718 transitions. [2021-12-17 15:32:31,935 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 7718 transitions. Word has length 79 [2021-12-17 15:32:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:31,935 INFO L470 AbstractCegarLoop]: Abstraction has 5236 states and 7718 transitions. [2021-12-17 15:32:31,935 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) [2021-12-17 15:32:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 7718 transitions. [2021-12-17 15:32:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 15:32:31,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:31,938 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] [2021-12-17 15:32:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 15:32:31,938 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -22506739, now seen corresponding path program 1 times [2021-12-17 15:32:31,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499603696] [2021-12-17 15:32:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:31,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:31,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:31,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499603696] [2021-12-17 15:32:31,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499603696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:31,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:31,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:32:31,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592145866] [2021-12-17 15:32:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:31,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:32:31,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:31,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:32:31,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:32:31,968 INFO L87 Difference]: Start difference. First operand 5236 states and 7718 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) [2021-12-17 15:32:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:32,447 INFO L93 Difference]: Finished difference Result 14006 states and 20488 transitions. [2021-12-17 15:32:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:32:32,448 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 [2021-12-17 15:32:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:32,464 INFO L225 Difference]: With dead ends: 14006 [2021-12-17 15:32:32,465 INFO L226 Difference]: Without dead ends: 8669 [2021-12-17 15:32:32,474 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 [2021-12-17 15:32:32,475 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 658 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1288 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 [2021-12-17 15:32:32,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1288 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2021-12-17 15:32:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 7699. [2021-12-17 15:32:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7693 states have (on average 1.443000129988301) internal successors, (11101), 7697 states have internal predecessors, (11101), 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) [2021-12-17 15:32:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11106 transitions. [2021-12-17 15:32:32,803 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11106 transitions. Word has length 91 [2021-12-17 15:32:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:32,804 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 11106 transitions. [2021-12-17 15:32:32,804 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) [2021-12-17 15:32:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11106 transitions. [2021-12-17 15:32:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 15:32:32,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:32,807 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] [2021-12-17 15:32:32,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 15:32:32,807 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash 713103324, now seen corresponding path program 1 times [2021-12-17 15:32:32,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150101420] [2021-12-17 15:32:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:32,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:32,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150101420] [2021-12-17 15:32:32,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150101420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:32,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:32,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:32,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860270872] [2021-12-17 15:32:32,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:32,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:32,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:32,842 INFO L87 Difference]: Start difference. First operand 7699 states and 11106 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) [2021-12-17 15:32:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:33,053 INFO L93 Difference]: Finished difference Result 11093 states and 16026 transitions. [2021-12-17 15:32:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:33,054 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 [2021-12-17 15:32:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:33,060 INFO L225 Difference]: With dead ends: 11093 [2021-12-17 15:32:33,060 INFO L226 Difference]: Without dead ends: 3397 [2021-12-17 15:32:33,070 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 [2021-12-17 15:32:33,071 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 347 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 529 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 [2021-12-17 15:32:33,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 529 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-12-17 15:32:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3344. [2021-12-17 15:32:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3338 states have (on average 1.3523067705212701) internal successors, (4514), 3342 states have internal predecessors, (4514), 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) [2021-12-17 15:32:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4519 transitions. [2021-12-17 15:32:33,204 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4519 transitions. Word has length 99 [2021-12-17 15:32:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:33,204 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 4519 transitions. [2021-12-17 15:32:33,204 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) [2021-12-17 15:32:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4519 transitions. [2021-12-17 15:32:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 15:32:33,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:33,206 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] [2021-12-17 15:32:33,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 15:32:33,206 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1037594014, now seen corresponding path program 1 times [2021-12-17 15:32:33,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:33,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246638514] [2021-12-17 15:32:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:33,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:33,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246638514] [2021-12-17 15:32:33,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246638514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:33,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:33,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:32:33,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214470351] [2021-12-17 15:32:33,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:32:33,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:32:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:32:33,245 INFO L87 Difference]: Start difference. First operand 3344 states and 4519 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) [2021-12-17 15:32:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:33,700 INFO L93 Difference]: Finished difference Result 12772 states and 17244 transitions. [2021-12-17 15:32:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:32:33,700 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 [2021-12-17 15:32:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:33,712 INFO L225 Difference]: With dead ends: 12772 [2021-12-17 15:32:33,712 INFO L226 Difference]: Without dead ends: 9605 [2021-12-17 15:32:33,717 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 [2021-12-17 15:32:33,718 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 1560 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:33,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 3438 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-12-17 15:32:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 3346. [2021-12-17 15:32:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3340 states have (on average 1.3502994011976048) internal successors, (4510), 3344 states have internal predecessors, (4510), 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) [2021-12-17 15:32:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 4515 transitions. [2021-12-17 15:32:33,901 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 4515 transitions. Word has length 101 [2021-12-17 15:32:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:33,901 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 4515 transitions. [2021-12-17 15:32:33,902 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) [2021-12-17 15:32:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 4515 transitions. [2021-12-17 15:32:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 15:32:33,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:33,903 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] [2021-12-17 15:32:33,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 15:32:33,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1285693593, now seen corresponding path program 1 times [2021-12-17 15:32:33,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422547657] [2021-12-17 15:32:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:33,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:33,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422547657] [2021-12-17 15:32:33,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422547657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992370352] [2021-12-17 15:32:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:33,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:33,957 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) [2021-12-17 15:32:33,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:32:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:34,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992370352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:34,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505461477] [2021-12-17 15:32:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:34,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:34,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:34,340 INFO L87 Difference]: Start difference. First operand 3346 states and 4515 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) [2021-12-17 15:32:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:34,503 INFO L93 Difference]: Finished difference Result 3993 states and 5384 transitions. [2021-12-17 15:32:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:34,504 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 [2021-12-17 15:32:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:34,509 INFO L225 Difference]: With dead ends: 3993 [2021-12-17 15:32:34,509 INFO L226 Difference]: Without dead ends: 3989 [2021-12-17 15:32:34,510 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 [2021-12-17 15:32:34,511 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 241 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 819 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 [2021-12-17 15:32:34,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 819 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2021-12-17 15:32:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3939. [2021-12-17 15:32:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3933 states have (on average 1.3478260869565217) internal successors, (5301), 3937 states have internal predecessors, (5301), 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) [2021-12-17 15:32:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5306 transitions. [2021-12-17 15:32:34,765 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5306 transitions. Word has length 103 [2021-12-17 15:32:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:34,766 INFO L470 AbstractCegarLoop]: Abstraction has 3939 states and 5306 transitions. [2021-12-17 15:32:34,766 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) [2021-12-17 15:32:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5306 transitions. [2021-12-17 15:32:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 15:32:34,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:34,769 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, 1, 1, 1] [2021-12-17 15:32:34,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:34,993 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 [2021-12-17 15:32:34,993 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -219637223, now seen corresponding path program 1 times [2021-12-17 15:32:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855365672] [2021-12-17 15:32:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:34,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:32:35,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855365672] [2021-12-17 15:32:35,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855365672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397657899] [2021-12-17 15:32:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:35,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:35,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:35,053 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) [2021-12-17 15:32:35,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:32:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:35,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:35,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397657899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:35,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:35,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:35,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687422941] [2021-12-17 15:32:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:35,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:35,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:35,448 INFO L87 Difference]: Start difference. First operand 3939 states and 5306 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:32:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:35,656 INFO L93 Difference]: Finished difference Result 7022 states and 9512 transitions. [2021-12-17 15:32:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:35,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 [2021-12-17 15:32:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:35,661 INFO L225 Difference]: With dead ends: 7022 [2021-12-17 15:32:35,661 INFO L226 Difference]: Without dead ends: 3088 [2021-12-17 15:32:35,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:35,668 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 272 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 430 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 [2021-12-17 15:32:35,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 430 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-12-17 15:32:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2866. [2021-12-17 15:32:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.3297202797202796) internal successors, (3803), 2864 states have internal predecessors, (3803), 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) [2021-12-17 15:32:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3808 transitions. [2021-12-17 15:32:35,857 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3808 transitions. Word has length 160 [2021-12-17 15:32:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:35,857 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 3808 transitions. [2021-12-17 15:32:35,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-17 15:32:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3808 transitions. [2021-12-17 15:32:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 15:32:35,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:35,861 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, 1, 1, 1] [2021-12-17 15:32:35,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 15:32:36,084 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 [2021-12-17 15:32:36,084 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1280711905, now seen corresponding path program 1 times [2021-12-17 15:32:36,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:36,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989618876] [2021-12-17 15:32:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:36,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:36,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989618876] [2021-12-17 15:32:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989618876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273898762] [2021-12-17 15:32:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:36,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:36,160 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) [2021-12-17 15:32:36,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:32:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 15:32:36,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:36,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273898762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:36,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:36,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:36,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607173281] [2021-12-17 15:32:36,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:36,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:36,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:36,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:36,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:36,517 INFO L87 Difference]: Start difference. First operand 2866 states and 3808 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-17 15:32:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:36,727 INFO L93 Difference]: Finished difference Result 5560 states and 7429 transitions. [2021-12-17 15:32:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 [2021-12-17 15:32:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:36,731 INFO L225 Difference]: With dead ends: 5560 [2021-12-17 15:32:36,731 INFO L226 Difference]: Without dead ends: 2866 [2021-12-17 15:32:36,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:36,736 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 282 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 402 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 [2021-12-17 15:32:36,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 402 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:36,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-12-17 15:32:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2866. [2021-12-17 15:32:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.2961538461538462) internal successors, (3707), 2864 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) [2021-12-17 15:32:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3712 transitions. [2021-12-17 15:32:36,924 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3712 transitions. Word has length 163 [2021-12-17 15:32:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:36,925 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 3712 transitions. [2021-12-17 15:32:36,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-17 15:32:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3712 transitions. [2021-12-17 15:32:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 15:32:36,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:36,927 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, 1, 1, 1] [2021-12-17 15:32:36,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:37,143 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 [2021-12-17 15:32:37,144 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1156524976, now seen corresponding path program 1 times [2021-12-17 15:32:37,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:37,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668448423] [2021-12-17 15:32:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:37,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:37,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668448423] [2021-12-17 15:32:37,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668448423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2759770] [2021-12-17 15:32:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:37,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:37,198 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) [2021-12-17 15:32:37,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:32:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:37,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 15:32:37,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:37,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2759770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:37,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:37,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:37,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882263634] [2021-12-17 15:32:37,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:37,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:37,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:37,611 INFO L87 Difference]: Start difference. First operand 2866 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-17 15:32:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:38,007 INFO L93 Difference]: Finished difference Result 6487 states and 8570 transitions. [2021-12-17 15:32:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:38,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 164 [2021-12-17 15:32:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:38,011 INFO L225 Difference]: With dead ends: 6487 [2021-12-17 15:32:38,012 INFO L226 Difference]: Without dead ends: 3793 [2021-12-17 15:32:38,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:38,016 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 213 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 684 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 [2021-12-17 15:32:38,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 684 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-12-17 15:32:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3705. [2021-12-17 15:32:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3699 states have (on average 1.2660178426601785) internal successors, (4683), 3703 states have internal predecessors, (4683), 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) [2021-12-17 15:32:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4688 transitions. [2021-12-17 15:32:38,220 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4688 transitions. Word has length 164 [2021-12-17 15:32:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:38,221 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 4688 transitions. [2021-12-17 15:32:38,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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) [2021-12-17 15:32:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4688 transitions. [2021-12-17 15:32:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 15:32:38,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:38,226 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, 1, 1, 1] [2021-12-17 15:32:38,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:38,448 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 [2021-12-17 15:32:38,448 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1102689509, now seen corresponding path program 1 times [2021-12-17 15:32:38,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:38,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590420934] [2021-12-17 15:32:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:38,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:38,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590420934] [2021-12-17 15:32:38,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590420934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342759429] [2021-12-17 15:32:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:38,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:38,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:38,559 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) [2021-12-17 15:32:38,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:32:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:32:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:39,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:32:39,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342759429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:39,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:39,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-17 15:32:39,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532147930] [2021-12-17 15:32:39,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:39,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:32:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:32:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:32:39,558 INFO L87 Difference]: Start difference. First operand 3705 states and 4688 transitions. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 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) [2021-12-17 15:32:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:40,747 INFO L93 Difference]: Finished difference Result 18600 states and 23623 transitions. [2021-12-17 15:32:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 15:32:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 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 166 [2021-12-17 15:32:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:40,768 INFO L225 Difference]: With dead ends: 18600 [2021-12-17 15:32:40,768 INFO L226 Difference]: Without dead ends: 15067 [2021-12-17 15:32:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 343 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 15:32:40,780 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 4181 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 5741 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:40,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4181 Valid, 5741 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15067 states. [2021-12-17 15:32:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15067 to 5254. [2021-12-17 15:32:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5248 states have (on average 1.271341463414634) internal successors, (6672), 5252 states have internal predecessors, (6672), 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) [2021-12-17 15:32:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 6677 transitions. [2021-12-17 15:32:41,124 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 6677 transitions. Word has length 166 [2021-12-17 15:32:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:41,125 INFO L470 AbstractCegarLoop]: Abstraction has 5254 states and 6677 transitions. [2021-12-17 15:32:41,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 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) [2021-12-17 15:32:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 6677 transitions. [2021-12-17 15:32:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-17 15:32:41,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:41,127 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, 1, 1, 1] [2021-12-17 15:32:41,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:41,330 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 [2021-12-17 15:32:41,331 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1782230669, now seen corresponding path program 1 times [2021-12-17 15:32:41,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:41,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331246991] [2021-12-17 15:32:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:41,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:32:41,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331246991] [2021-12-17 15:32:41,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331246991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958298222] [2021-12-17 15:32:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:41,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:41,492 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) [2021-12-17 15:32:41,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:32:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:32:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:32:42,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:32:43,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958298222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:43,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:43,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-17 15:32:43,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017480240] [2021-12-17 15:32:43,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:43,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:32:43,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:32:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:32:43,177 INFO L87 Difference]: Start difference. First operand 5254 states and 6677 transitions. Second operand has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 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) [2021-12-17 15:32:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:44,975 INFO L93 Difference]: Finished difference Result 24208 states and 30652 transitions. [2021-12-17 15:32:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 15:32:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 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 [2021-12-17 15:32:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:44,997 INFO L225 Difference]: With dead ends: 24208 [2021-12-17 15:32:44,997 INFO L226 Difference]: Without dead ends: 19126 [2021-12-17 15:32:45,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 545 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 15:32:45,007 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 5839 mSDsluCounter, 10366 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5839 SdHoareTripleChecker+Valid, 11860 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:45,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5839 Valid, 11860 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:32:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2021-12-17 15:32:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 6677. [2021-12-17 15:32:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6671 states have (on average 1.272822665267576) internal successors, (8491), 6675 states have internal predecessors, (8491), 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) [2021-12-17 15:32:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 8496 transitions. [2021-12-17 15:32:45,538 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 8496 transitions. Word has length 266 [2021-12-17 15:32:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:45,539 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 8496 transitions. [2021-12-17 15:32:45,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 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) [2021-12-17 15:32:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 8496 transitions. [2021-12-17 15:32:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-17 15:32:45,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:45,543 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:45,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:45,752 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 [2021-12-17 15:32:45,753 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1036581045, now seen corresponding path program 1 times [2021-12-17 15:32:45,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40335898] [2021-12-17 15:32:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:45,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:32:46,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40335898] [2021-12-17 15:32:46,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40335898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449801022] [2021-12-17 15:32:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:46,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:46,002 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) [2021-12-17 15:32:46,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:32:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:32:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:32:47,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:32:48,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449801022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:48,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:48,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-17 15:32:48,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21998419] [2021-12-17 15:32:48,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:48,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:32:48,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:32:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:32:48,237 INFO L87 Difference]: Start difference. First operand 6677 states and 8496 transitions. Second operand has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 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) [2021-12-17 15:32:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:50,953 INFO L93 Difference]: Finished difference Result 29894 states and 37793 transitions. [2021-12-17 15:32:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 15:32:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 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 367 [2021-12-17 15:32:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:50,985 INFO L225 Difference]: With dead ends: 29894 [2021-12-17 15:32:50,985 INFO L226 Difference]: Without dead ends: 23389 [2021-12-17 15:32:50,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 752 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 15:32:50,999 INFO L933 BasicCegarLoop]: 2133 mSDtfsCounter, 7747 mSDsluCounter, 18920 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7747 SdHoareTripleChecker+Valid, 21053 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:50,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7747 Valid, 21053 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 15:32:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23389 states. [2021-12-17 15:32:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23389 to 8102. [2021-12-17 15:32:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8102 states, 8096 states have (on average 1.273715415019763) internal successors, (10312), 8100 states have internal predecessors, (10312), 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) [2021-12-17 15:32:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8102 states to 8102 states and 10317 transitions. [2021-12-17 15:32:51,604 INFO L78 Accepts]: Start accepts. Automaton has 8102 states and 10317 transitions. Word has length 367 [2021-12-17 15:32:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:51,604 INFO L470 AbstractCegarLoop]: Abstraction has 8102 states and 10317 transitions. [2021-12-17 15:32:51,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 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) [2021-12-17 15:32:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8102 states and 10317 transitions. [2021-12-17 15:32:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 15:32:51,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:51,609 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:51,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:51,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:51,819 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1736090188, now seen corresponding path program 1 times [2021-12-17 15:32:51,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295168791] [2021-12-17 15:32:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:51,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 354 proven. 494 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:32:52,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295168791] [2021-12-17 15:32:52,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295168791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024121481] [2021-12-17 15:32:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:52,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:52,054 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) [2021-12-17 15:32:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 15:32:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 15:32:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:32:53,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:32:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024121481] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:53,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:53,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 22 [2021-12-17 15:32:53,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952225160] [2021-12-17 15:32:53,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:53,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 15:32:53,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 15:32:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-12-17 15:32:53,896 INFO L87 Difference]: Start difference. First operand 8102 states and 10317 transitions. Second operand has 22 states, 22 states have (on average 34.5) internal successors, (759), 22 states have internal predecessors, (759), 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) [2021-12-17 15:32:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:57,813 INFO L93 Difference]: Finished difference Result 36657 states and 46368 transitions. [2021-12-17 15:32:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-12-17 15:32:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 34.5) internal successors, (759), 22 states have internal predecessors, (759), 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 469 [2021-12-17 15:32:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:57,848 INFO L225 Difference]: With dead ends: 36657 [2021-12-17 15:32:57,848 INFO L226 Difference]: Without dead ends: 28727 [2021-12-17 15:32:57,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 963 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=862, Invalid=6448, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 15:32:57,860 INFO L933 BasicCegarLoop]: 2725 mSDtfsCounter, 19457 mSDsluCounter, 30741 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19457 SdHoareTripleChecker+Valid, 33466 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:57,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19457 Valid, 33466 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:32:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28727 states. [2021-12-17 15:32:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28727 to 9368. [2021-12-17 15:32:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9368 states, 9362 states have (on average 1.2760093997009185) internal successors, (11946), 9366 states have internal predecessors, (11946), 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) [2021-12-17 15:32:58,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9368 states to 9368 states and 11951 transitions. [2021-12-17 15:32:58,634 INFO L78 Accepts]: Start accepts. Automaton has 9368 states and 11951 transitions. Word has length 469 [2021-12-17 15:32:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:58,634 INFO L470 AbstractCegarLoop]: Abstraction has 9368 states and 11951 transitions. [2021-12-17 15:32:58,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 34.5) internal successors, (759), 22 states have internal predecessors, (759), 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) [2021-12-17 15:32:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9368 states and 11951 transitions. [2021-12-17 15:32:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-12-17 15:32:58,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:58,640 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:58,844 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,SelfDestructingSolverStorable22 [2021-12-17 15:32:58,845 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 29310338, now seen corresponding path program 1 times [2021-12-17 15:32:58,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686805847] [2021-12-17 15:32:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:58,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-17 15:32:58,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686805847] [2021-12-17 15:32:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686805847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:58,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:58,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:58,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168361912] [2021-12-17 15:32:58,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:58,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:58,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:58,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:58,935 INFO L87 Difference]: Start difference. First operand 9368 states and 11951 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2021-12-17 15:32:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:59,165 INFO L93 Difference]: Finished difference Result 11427 states and 14322 transitions. [2021-12-17 15:32:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 573 [2021-12-17 15:32:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:59,169 INFO L225 Difference]: With dead ends: 11427 [2021-12-17 15:32:59,169 INFO L226 Difference]: Without dead ends: 2115 [2021-12-17 15:32:59,175 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 [2021-12-17 15:32:59,176 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 142 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 412 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 [2021-12-17 15:32:59,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 412 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-12-17 15:32:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1302. [2021-12-17 15:32:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1298 states have (on average 1.0731895223420647) internal successors, (1393), 1300 states have internal predecessors, (1393), 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) [2021-12-17 15:32:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1396 transitions. [2021-12-17 15:32:59,276 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1396 transitions. Word has length 573 [2021-12-17 15:32:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:59,277 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1396 transitions. [2021-12-17 15:32:59,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2021-12-17 15:32:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1396 transitions. [2021-12-17 15:32:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-12-17 15:32:59,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:59,282 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:59,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 15:32:59,283 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash 61583050, now seen corresponding path program 1 times [2021-12-17 15:32:59,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871095893] [2021-12-17 15:32:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:59,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-17 15:32:59,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:59,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871095893] [2021-12-17 15:32:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871095893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:59,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:32:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561694393] [2021-12-17 15:32:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:59,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:32:59,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:32:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:32:59,391 INFO L87 Difference]: Start difference. First operand 1302 states and 1396 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 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) [2021-12-17 15:32:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:59,714 INFO L93 Difference]: Finished difference Result 2472 states and 2708 transitions. [2021-12-17 15:32:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:32:59,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 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 574 [2021-12-17 15:32:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:59,718 INFO L225 Difference]: With dead ends: 2472 [2021-12-17 15:32:59,718 INFO L226 Difference]: Without dead ends: 2261 [2021-12-17 15:32:59,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:32:59,720 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 934 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:59,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2554 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-12-17 15:32:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1369. [2021-12-17 15:32:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.0747252747252747) internal successors, (1467), 1367 states have internal predecessors, (1467), 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) [2021-12-17 15:32:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1470 transitions. [2021-12-17 15:32:59,826 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1470 transitions. Word has length 574 [2021-12-17 15:32:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:59,827 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1470 transitions. [2021-12-17 15:32:59,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 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) [2021-12-17 15:32:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1470 transitions. [2021-12-17 15:32:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-17 15:32:59,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:59,832 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:59,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 15:32:59,833 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1902632470, now seen corresponding path program 1 times [2021-12-17 15:32:59,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:59,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025731381] [2021-12-17 15:32:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-17 15:33:00,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025731381] [2021-12-17 15:33:00,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025731381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:33:00,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:33:00,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:33:00,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234582184] [2021-12-17 15:33:00,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:33:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:33:00,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:33:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:33:00,022 INFO L87 Difference]: Start difference. First operand 1369 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2021-12-17 15:33:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:00,243 INFO L93 Difference]: Finished difference Result 1750 states and 1900 transitions. [2021-12-17 15:33:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:33:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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 575 [2021-12-17 15:33:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:00,246 INFO L225 Difference]: With dead ends: 1750 [2021-12-17 15:33:00,246 INFO L226 Difference]: Without dead ends: 1539 [2021-12-17 15:33:00,247 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 [2021-12-17 15:33:00,247 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 458 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 949 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 [2021-12-17 15:33:00,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 949 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:33:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-12-17 15:33:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1354. [2021-12-17 15:33:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1351 states have (on average 1.0636565507031828) internal successors, (1437), 1352 states have internal predecessors, (1437), 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) [2021-12-17 15:33:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1439 transitions. [2021-12-17 15:33:00,359 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1439 transitions. Word has length 575 [2021-12-17 15:33:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1439 transitions. [2021-12-17 15:33:00,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2021-12-17 15:33:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1439 transitions. [2021-12-17 15:33:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-12-17 15:33:00,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:00,364 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:00,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 15:33:00,364 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1877942903, now seen corresponding path program 1 times [2021-12-17 15:33:00,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:00,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577347698] [2021-12-17 15:33:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:00,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 122 proven. 403 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-12-17 15:33:00,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577347698] [2021-12-17 15:33:00,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577347698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839539188] [2021-12-17 15:33:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:00,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:00,857 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) [2021-12-17 15:33:00,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 15:33:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 15:33:01,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 124 proven. 333 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-17 15:33:02,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 30 proven. 427 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-17 15:33:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839539188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:03,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:03,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-17 15:33:03,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689526918] [2021-12-17 15:33:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:03,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 15:33:03,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 15:33:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:33:03,652 INFO L87 Difference]: Start difference. First operand 1354 states and 1439 transitions. Second operand has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 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) [2021-12-17 15:33:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:04,387 INFO L93 Difference]: Finished difference Result 1796 states and 1910 transitions. [2021-12-17 15:33:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 15:33:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 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 631 [2021-12-17 15:33:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:04,390 INFO L225 Difference]: With dead ends: 1796 [2021-12-17 15:33:04,390 INFO L226 Difference]: Without dead ends: 1793 [2021-12-17 15:33:04,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1252 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 15:33:04,392 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 2999 mSDsluCounter, 6423 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:04,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2999 Valid, 6824 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:33:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-12-17 15:33:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1454. [2021-12-17 15:33:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1451 states have (on average 1.062026188835286) internal successors, (1541), 1452 states have internal predecessors, (1541), 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) [2021-12-17 15:33:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1543 transitions. [2021-12-17 15:33:04,522 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1543 transitions. Word has length 631 [2021-12-17 15:33:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:04,523 INFO L470 AbstractCegarLoop]: Abstraction has 1454 states and 1543 transitions. [2021-12-17 15:33:04,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 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) [2021-12-17 15:33:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1543 transitions. [2021-12-17 15:33:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2021-12-17 15:33:04,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:04,528 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:04,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:04,743 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 [2021-12-17 15:33:04,744 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -659046380, now seen corresponding path program 1 times [2021-12-17 15:33:04,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135681778] [2021-12-17 15:33:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:04,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-17 15:33:04,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135681778] [2021-12-17 15:33:04,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135681778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787660488] [2021-12-17 15:33:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:04,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:04,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:05,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 15:33:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:33:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-17 15:33:06,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-17 15:33:06,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787660488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:06,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:06,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-17 15:33:06,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276003870] [2021-12-17 15:33:06,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:06,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:33:06,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:33:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:33:06,936 INFO L87 Difference]: Start difference. First operand 1454 states and 1543 transitions. Second operand has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 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) [2021-12-17 15:33:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:07,364 INFO L93 Difference]: Finished difference Result 2313 states and 2471 transitions. [2021-12-17 15:33:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:33:07,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 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 681 [2021-12-17 15:33:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:07,367 INFO L225 Difference]: With dead ends: 2313 [2021-12-17 15:33:07,368 INFO L226 Difference]: Without dead ends: 2117 [2021-12-17 15:33:07,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1389 GetRequests, 1367 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-17 15:33:07,369 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 1150 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:07,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 3453 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:33:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-12-17 15:33:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1540. [2021-12-17 15:33:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1537 states have (on average 1.0618087182823683) internal successors, (1632), 1538 states have internal predecessors, (1632), 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) [2021-12-17 15:33:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 1634 transitions. [2021-12-17 15:33:07,569 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 1634 transitions. Word has length 681 [2021-12-17 15:33:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:07,569 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 1634 transitions. [2021-12-17 15:33:07,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 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) [2021-12-17 15:33:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 1634 transitions. [2021-12-17 15:33:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2021-12-17 15:33:07,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:07,574 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 15:33:07,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:07,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 15:33:07,777 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1976417087, now seen corresponding path program 1 times [2021-12-17 15:33:07,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668222801] [2021-12-17 15:33:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:07,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 232 proven. 1011 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-12-17 15:33:08,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:08,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668222801] [2021-12-17 15:33:08,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668222801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:08,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797989521] [2021-12-17 15:33:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:08,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:08,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:08,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 15:33:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 15:33:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 319 proven. 870 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-17 15:33:10,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 35 proven. 1154 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-17 15:33:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797989521] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:11,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:11,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-17 15:33:11,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759047691] [2021-12-17 15:33:11,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:11,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:33:11,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:33:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 15:33:11,406 INFO L87 Difference]: Start difference. First operand 1540 states and 1634 transitions. Second operand has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 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) [2021-12-17 15:33:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:12,340 INFO L93 Difference]: Finished difference Result 1913 states and 2029 transitions. [2021-12-17 15:33:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 15:33:12,340 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 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 739 [2021-12-17 15:33:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:12,343 INFO L225 Difference]: With dead ends: 1913 [2021-12-17 15:33:12,343 INFO L226 Difference]: Without dead ends: 1910 [2021-12-17 15:33:12,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1541 GetRequests, 1473 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 15:33:12,345 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 3186 mSDsluCounter, 13362 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 14002 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:12,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3186 Valid, 14002 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:33:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2021-12-17 15:33:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1640. [2021-12-17 15:33:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1637 states have (on average 1.0604764813683567) internal successors, (1736), 1638 states have internal predecessors, (1736), 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) [2021-12-17 15:33:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1738 transitions. [2021-12-17 15:33:12,499 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1738 transitions. Word has length 739 [2021-12-17 15:33:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 1738 transitions. [2021-12-17 15:33:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 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) [2021-12-17 15:33:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1738 transitions. [2021-12-17 15:33:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-17 15:33:12,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:12,506 INFO L514 BasicCegarLoop]: trace histogram [15, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 15:33:12,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 15:33:12,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 15:33:12,715 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -915433764, now seen corresponding path program 1 times [2021-12-17 15:33:12,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731519635] [2021-12-17 15:33:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:12,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-17 15:33:12,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:12,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731519635] [2021-12-17 15:33:12,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731519635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:12,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671874591] [2021-12-17 15:33:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:12,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:12,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:12,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:12,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 15:33:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:33:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-17 15:33:14,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-17 15:33:15,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671874591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:15,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:15,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-17 15:33:15,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60228472] [2021-12-17 15:33:15,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:15,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:33:15,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:33:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:33:15,416 INFO L87 Difference]: Start difference. First operand 1640 states and 1738 transitions. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 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) [2021-12-17 15:33:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:15,923 INFO L93 Difference]: Finished difference Result 2511 states and 2682 transitions. [2021-12-17 15:33:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:33:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 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 789 [2021-12-17 15:33:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:15,927 INFO L225 Difference]: With dead ends: 2511 [2021-12-17 15:33:15,927 INFO L226 Difference]: Without dead ends: 2315 [2021-12-17 15:33:15,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1612 GetRequests, 1586 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-12-17 15:33:15,928 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 1427 mSDsluCounter, 5155 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 5861 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:15,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 5861 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:33:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-12-17 15:33:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1728. [2021-12-17 15:33:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1725 states have (on average 1.0602898550724638) internal successors, (1829), 1726 states have internal predecessors, (1829), 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) [2021-12-17 15:33:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 1831 transitions. [2021-12-17 15:33:16,135 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 1831 transitions. Word has length 789 [2021-12-17 15:33:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 1831 transitions. [2021-12-17 15:33:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 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) [2021-12-17 15:33:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 1831 transitions. [2021-12-17 15:33:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-17 15:33:16,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:16,142 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:16,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:16,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:16,345 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash -564749760, now seen corresponding path program 1 times [2021-12-17 15:33:16,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132936470] [2021-12-17 15:33:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:16,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 189 proven. 1783 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-17 15:33:16,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132936470] [2021-12-17 15:33:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132936470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515030292] [2021-12-17 15:33:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:16,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:16,933 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:16,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 15:33:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2280 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 15:33:17,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 422 proven. 1514 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 15:33:19,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 40 proven. 1896 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 15:33:20,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515030292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:20,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:20,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-12-17 15:33:20,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256308822] [2021-12-17 15:33:20,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:20,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 15:33:20,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:20,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 15:33:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 15:33:20,922 INFO L87 Difference]: Start difference. First operand 1728 states and 1831 transitions. Second operand has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 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) [2021-12-17 15:33:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:22,233 INFO L93 Difference]: Finished difference Result 2111 states and 2236 transitions. [2021-12-17 15:33:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 15:33:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 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 848 [2021-12-17 15:33:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:22,237 INFO L225 Difference]: With dead ends: 2111 [2021-12-17 15:33:22,237 INFO L226 Difference]: Without dead ends: 2108 [2021-12-17 15:33:22,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1693 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 15:33:22,239 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 3766 mSDsluCounter, 20713 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3766 SdHoareTripleChecker+Valid, 21597 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:22,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3766 Valid, 21597 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:33:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-17 15:33:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1828. [2021-12-17 15:33:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1825 states have (on average 1.059178082191781) internal successors, (1933), 1826 states have internal predecessors, (1933), 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) [2021-12-17 15:33:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 1935 transitions. [2021-12-17 15:33:22,438 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 1935 transitions. Word has length 848 [2021-12-17 15:33:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:22,439 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 1935 transitions. [2021-12-17 15:33:22,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 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) [2021-12-17 15:33:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 1935 transitions. [2021-12-17 15:33:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2021-12-17 15:33:22,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:22,446 INFO L514 BasicCegarLoop]: trace histogram [17, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:22,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 15:33:22,647 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:22,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1919800221, now seen corresponding path program 1 times [2021-12-17 15:33:22,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:22,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629959897] [2021-12-17 15:33:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:22,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-17 15:33:22,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629959897] [2021-12-17 15:33:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629959897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310846068] [2021-12-17 15:33:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:22,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:22,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:22,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 15:33:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2409 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:33:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-17 15:33:24,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-17 15:33:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310846068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:26,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-17 15:33:26,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425419430] [2021-12-17 15:33:26,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:26,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:33:26,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:33:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:33:26,181 INFO L87 Difference]: Start difference. First operand 1828 states and 1935 transitions. Second operand has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 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) [2021-12-17 15:33:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:26,854 INFO L93 Difference]: Finished difference Result 2711 states and 2895 transitions. [2021-12-17 15:33:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 15:33:26,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 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 898 [2021-12-17 15:33:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:26,857 INFO L225 Difference]: With dead ends: 2711 [2021-12-17 15:33:26,857 INFO L226 Difference]: Without dead ends: 2515 [2021-12-17 15:33:26,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1837 GetRequests, 1807 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:33:26,858 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 1707 mSDsluCounter, 8208 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 9100 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:26,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 9100 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:33:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-12-17 15:33:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1918. [2021-12-17 15:33:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1915 states have (on average 1.0590078328981722) internal successors, (2028), 1916 states have internal predecessors, (2028), 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) [2021-12-17 15:33:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2030 transitions. [2021-12-17 15:33:27,064 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2030 transitions. Word has length 898 [2021-12-17 15:33:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:27,065 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2030 transitions. [2021-12-17 15:33:27,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 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) [2021-12-17 15:33:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2030 transitions. [2021-12-17 15:33:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-12-17 15:33:27,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:27,072 INFO L514 BasicCegarLoop]: trace histogram [18, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:27,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 15:33:27,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:27,273 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1153982525, now seen corresponding path program 1 times [2021-12-17 15:33:27,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832341824] [2021-12-17 15:33:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:27,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 146 proven. 2564 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 15:33:27,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832341824] [2021-12-17 15:33:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832341824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879338004] [2021-12-17 15:33:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:27,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:27,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:27,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 15:33:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:28,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 15:33:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 429 proven. 2263 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 15:33:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 45 proven. 2647 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 15:33:32,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879338004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:32,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:32,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 46 [2021-12-17 15:33:32,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244580869] [2021-12-17 15:33:32,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:32,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 15:33:32,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 15:33:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 15:33:32,967 INFO L87 Difference]: Start difference. First operand 1918 states and 2030 transitions. Second operand has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 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) [2021-12-17 15:33:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:34,728 INFO L93 Difference]: Finished difference Result 2389 states and 2528 transitions. [2021-12-17 15:33:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 15:33:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 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 958 [2021-12-17 15:33:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:34,731 INFO L225 Difference]: With dead ends: 2389 [2021-12-17 15:33:34,731 INFO L226 Difference]: Without dead ends: 2386 [2021-12-17 15:33:34,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 1915 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=591, Invalid=7065, Unknown=0, NotChecked=0, Total=7656 [2021-12-17 15:33:34,733 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 4378 mSDsluCounter, 32196 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4378 SdHoareTripleChecker+Valid, 33326 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:34,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4378 Valid, 33326 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 15:33:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-12-17 15:33:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2018. [2021-12-17 15:33:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2015 states have (on average 1.0580645161290323) internal successors, (2132), 2016 states have internal predecessors, (2132), 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) [2021-12-17 15:33:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2134 transitions. [2021-12-17 15:33:34,950 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2134 transitions. Word has length 958 [2021-12-17 15:33:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:34,951 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 2134 transitions. [2021-12-17 15:33:34,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 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) [2021-12-17 15:33:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2134 transitions. [2021-12-17 15:33:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2021-12-17 15:33:34,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:34,959 INFO L514 BasicCegarLoop]: trace histogram [19, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-17 15:33:34,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:35,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:35,160 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1126968736, now seen corresponding path program 1 times [2021-12-17 15:33:35,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742093224] [2021-12-17 15:33:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:35,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-12-17 15:33:35,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742093224] [2021-12-17 15:33:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742093224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:35,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710674116] [2021-12-17 15:33:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:35,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:35,542 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:35,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 15:33:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 15:33:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-12-17 15:33:37,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-12-17 15:33:39,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710674116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:39,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2021-12-17 15:33:39,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552847100] [2021-12-17 15:33:39,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:39,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 15:33:39,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 15:33:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:33:39,397 INFO L87 Difference]: Start difference. First operand 2018 states and 2134 transitions. Second operand has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 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) [2021-12-17 15:33:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:40,229 INFO L93 Difference]: Finished difference Result 2930 states and 3127 transitions. [2021-12-17 15:33:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 15:33:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 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 1008 [2021-12-17 15:33:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:40,233 INFO L225 Difference]: With dead ends: 2930 [2021-12-17 15:33:40,233 INFO L226 Difference]: Without dead ends: 2734 [2021-12-17 15:33:40,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2063 GetRequests, 2029 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-17 15:33:40,235 INFO L933 BasicCegarLoop]: 1080 mSDtfsCounter, 1990 mSDsluCounter, 12024 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1990 SdHoareTripleChecker+Valid, 13104 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:40,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1990 Valid, 13104 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:33:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-12-17 15:33:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2110. [2021-12-17 15:33:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2107 states have (on average 1.0579022306597057) internal successors, (2229), 2108 states have internal predecessors, (2229), 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) [2021-12-17 15:33:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2231 transitions. [2021-12-17 15:33:40,502 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2231 transitions. Word has length 1008 [2021-12-17 15:33:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:40,503 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2231 transitions. [2021-12-17 15:33:40,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 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) [2021-12-17 15:33:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2231 transitions. [2021-12-17 15:33:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2021-12-17 15:33:40,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:40,512 INFO L514 BasicCegarLoop]: trace histogram [20, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:40,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 15:33:40,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-17 15:33:40,713 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1004803881, now seen corresponding path program 1 times [2021-12-17 15:33:40,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:40,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939788244] [2021-12-17 15:33:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:40,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 103 proven. 3353 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:33:41,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939788244] [2021-12-17 15:33:41,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939788244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796832607] [2021-12-17 15:33:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:41,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:41,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:41,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 15:33:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-17 15:33:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 340 proven. 3116 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:33:45,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:33:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 50 proven. 3406 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:33:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796832607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:33:47,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:33:47,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 52 [2021-12-17 15:33:47,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250805614] [2021-12-17 15:33:47,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:33:47,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 15:33:47,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 15:33:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2510, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 15:33:47,237 INFO L87 Difference]: Start difference. First operand 2110 states and 2231 transitions. Second operand has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 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) [2021-12-17 15:33:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:50,086 INFO L93 Difference]: Finished difference Result 3961 states and 4188 transitions. [2021-12-17 15:33:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-17 15:33:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 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 1069 [2021-12-17 15:33:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:50,090 INFO L225 Difference]: With dead ends: 3961 [2021-12-17 15:33:50,090 INFO L226 Difference]: Without dead ends: 3958 [2021-12-17 15:33:50,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2268 GetRequests, 2147 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3460 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=906, Invalid=12666, Unknown=0, NotChecked=0, Total=13572 [2021-12-17 15:33:50,094 INFO L933 BasicCegarLoop]: 1381 mSDtfsCounter, 6135 mSDsluCounter, 46890 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6135 SdHoareTripleChecker+Valid, 48271 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:50,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6135 Valid, 48271 Invalid, 3520 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [161 Valid, 3359 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:33:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-12-17 15:33:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3234. [2021-12-17 15:33:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3231 states have (on average 1.054781801299907) internal successors, (3408), 3232 states have internal predecessors, (3408), 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) [2021-12-17 15:33:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 3410 transitions. [2021-12-17 15:33:50,478 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 3410 transitions. Word has length 1069 [2021-12-17 15:33:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 3410 transitions. [2021-12-17 15:33:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 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) [2021-12-17 15:33:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 3410 transitions. [2021-12-17 15:33:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2021-12-17 15:33:50,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:33:50,490 INFO L514 BasicCegarLoop]: trace histogram [21, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:33:50,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 15:33:50,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:50,690 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:33:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:33:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 923938420, now seen corresponding path program 1 times [2021-12-17 15:33:50,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:33:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103846973] [2021-12-17 15:33:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:50,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:33:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3858 backedges. 2268 proven. 458 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2021-12-17 15:33:50,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:33:50,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103846973] [2021-12-17 15:33:50,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103846973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:33:50,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582920554] [2021-12-17 15:33:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:33:50,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:33:50,983 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:33:51,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 15:33:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:33:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 15:33:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:33:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3858 backedges. 2726 proven. 0 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2021-12-17 15:33:52,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:33:52,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582920554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:33:52,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:33:52,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-12-17 15:33:52,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529760791] [2021-12-17 15:33:52,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:33:52,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:33:52,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:33:52,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:33:52,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:33:52,644 INFO L87 Difference]: Start difference. First operand 3234 states and 3410 transitions. Second operand has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 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) [2021-12-17 15:33:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:33:53,075 INFO L93 Difference]: Finished difference Result 3264 states and 3440 transitions. [2021-12-17 15:33:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 15:33:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 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 1119 [2021-12-17 15:33:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:33:53,080 INFO L225 Difference]: With dead ends: 3264 [2021-12-17 15:33:53,081 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 15:33:53,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 1133 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2021-12-17 15:33:53,084 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 1466 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:33:53,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 3870 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:33:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 15:33:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 15:33:53,085 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) [2021-12-17 15:33:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 15:33:53,085 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1119 [2021-12-17 15:33:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:33:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 15:33:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.92307692307692) internal successors, (714), 13 states have internal predecessors, (714), 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) [2021-12-17 15:33:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 15:33:53,086 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 15:33:53,088 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 15:33:53,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-17 15:33:53,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:33:53,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Killed by 15