./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.4.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.4.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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:31:48,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:31:48,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:31:48,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:31:48,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:31:48,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:31:48,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:31:48,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:31:48,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:31:48,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:31:48,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:31:48,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:31:48,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:31:48,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:31:48,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:31:48,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:31:48,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:31:48,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:31:48,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:31:48,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:31:48,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:31:48,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:31:48,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:31:48,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:31:48,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:31:48,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:31:48,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:31:48,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:31:48,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:31:48,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:31:48,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:31:48,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:31:48,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:31:48,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:31:48,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:31:48,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:31:48,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:31:48,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:31:48,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:31:48,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:31:48,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:31:48,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:31:48,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:31:48,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:31:48,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:31:48,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:31:48,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:31:48,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:31:48,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:31:48,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:31:48,244 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:31:48,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:31:48,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:31:48,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:31:48,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:31:48,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:31:48,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:31:48,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:31:48,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:31:48,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:31:48,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:31:48,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2021-12-17 15:31:48,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:31:48,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:31:48,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:31:48,479 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:31:48,480 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:31:48,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-12-17 15:31:48,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e822a2d5a/5bf8f9338cb349e4a7ab6589fee28994/FLAG57d7f6d60 [2021-12-17 15:31:48,899 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:31:48,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2021-12-17 15:31:48,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e822a2d5a/5bf8f9338cb349e4a7ab6589fee28994/FLAG57d7f6d60 [2021-12-17 15:31:49,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e822a2d5a/5bf8f9338cb349e4a7ab6589fee28994 [2021-12-17 15:31:49,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:31:49,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:31:49,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:31:49,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:31:49,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:31:49,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c16f056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49, skipping insertion in model container [2021-12-17 15:31:49,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:31:49,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:31:49,419 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.4.cil.c[646,659] [2021-12-17 15:31:49,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:31:49,499 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:31:49,506 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.4.cil.c[646,659] [2021-12-17 15:31:49,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:31:49,580 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:31:49,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49 WrapperNode [2021-12-17 15:31:49,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:31:49,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:31:49,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:31:49,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:31:49,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,626 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2021-12-17 15:31:49,626 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:31:49,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:31:49,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:31:49,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:31:49,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:31:49,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:31:49,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:31:49,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:31:49,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (1/1) ... [2021-12-17 15:31:49,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:31:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:31:49,714 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 15:31:49,715 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 15:31:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:31:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:31:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-17 15:31:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-17 15:31:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:31:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:31:49,809 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:31:49,810 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:31:50,363 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:31:50,375 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:31:50,375 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-17 15:31:50,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:50 BoogieIcfgContainer [2021-12-17 15:31:50,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:31:50,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:31:50,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:31:50,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:31:50,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:31:49" (1/3) ... [2021-12-17 15:31:50,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe2e037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:50, skipping insertion in model container [2021-12-17 15:31:50,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:31:49" (2/3) ... [2021-12-17 15:31:50,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe2e037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:31:50, skipping insertion in model container [2021-12-17 15:31:50,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:31:50" (3/3) ... [2021-12-17 15:31:50,385 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2021-12-17 15:31:50,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:31:50,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:31:50,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:31:50,440 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 15:31:50,440 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:31:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 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 15:31:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 15:31:50,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:50,490 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 15:31:50,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash 193087539, now seen corresponding path program 1 times [2021-12-17 15:31:50,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507751668] [2021-12-17 15:31:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:50,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:50,655 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 15:31:50,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507751668] [2021-12-17 15:31:50,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507751668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:50,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:50,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:50,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626937717] [2021-12-17 15:31:50,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:50,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:50,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:50,688 INFO L87 Difference]: Start difference. First operand has 277 states, 269 states have (on average 1.8550185873605949) internal successors, (499), 275 states have internal predecessors, (499), 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 15:31:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:51,015 INFO L93 Difference]: Finished difference Result 730 states and 1341 transitions. [2021-12-17 15:31:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:51,018 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 15:31:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:51,031 INFO L225 Difference]: With dead ends: 730 [2021-12-17 15:31:51,031 INFO L226 Difference]: Without dead ends: 450 [2021-12-17 15:31:51,034 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 15:31:51,037 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 267 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 789 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 15:31:51,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 789 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:31:51,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-17 15:31:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 437. [2021-12-17 15:31:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.6009280742459397) internal successors, (690), 435 states have internal predecessors, (690), 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 15:31:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 695 transitions. [2021-12-17 15:31:51,088 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 695 transitions. Word has length 29 [2021-12-17 15:31:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 695 transitions. [2021-12-17 15:31:51,089 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 15:31:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 695 transitions. [2021-12-17 15:31:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 15:31:51,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:51,091 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] [2021-12-17 15:31:51,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:31:51,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 909656450, now seen corresponding path program 1 times [2021-12-17 15:31:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:51,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508261799] [2021-12-17 15:31:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:51,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:51,140 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 15:31:51,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:51,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508261799] [2021-12-17 15:31:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508261799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:51,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:51,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:51,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58364189] [2021-12-17 15:31:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:51,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:51,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:51,146 INFO L87 Difference]: Start difference. First operand 437 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 15:31:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:51,279 INFO L93 Difference]: Finished difference Result 1149 states and 1853 transitions. [2021-12-17 15:31:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:51,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 40 [2021-12-17 15:31:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:51,283 INFO L225 Difference]: With dead ends: 1149 [2021-12-17 15:31:51,283 INFO L226 Difference]: Without dead ends: 726 [2021-12-17 15:31:51,289 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 15:31:51,291 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 330 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1032 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 15:31:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1032 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:31:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-12-17 15:31:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 713. [2021-12-17 15:31:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 707 states have (on average 1.6350777934936351) internal successors, (1156), 711 states have internal predecessors, (1156), 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 15:31:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1161 transitions. [2021-12-17 15:31:51,327 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1161 transitions. Word has length 40 [2021-12-17 15:31:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:51,327 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1161 transitions. [2021-12-17 15:31:51,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 15:31:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1161 transitions. [2021-12-17 15:31:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 15:31:51,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:51,330 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 15:31:51,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:31:51,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:51,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1642726185, now seen corresponding path program 1 times [2021-12-17 15:31:51,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:51,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649104293] [2021-12-17 15:31:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:51,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:51,374 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 15:31:51,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:51,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649104293] [2021-12-17 15:31:51,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649104293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:51,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:51,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:51,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118340966] [2021-12-17 15:31:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:51,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:51,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:51,377 INFO L87 Difference]: Start difference. First operand 713 states and 1161 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 15:31:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:51,414 INFO L93 Difference]: Finished difference Result 1793 states and 2916 transitions. [2021-12-17 15:31:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:51,415 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 15:31:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:51,420 INFO L225 Difference]: With dead ends: 1793 [2021-12-17 15:31:51,420 INFO L226 Difference]: Without dead ends: 1105 [2021-12-17 15:31:51,421 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 15:31:51,422 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 357 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 817 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 15:31:51,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 817 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-12-17 15:31:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1094. [2021-12-17 15:31:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1088 states have (on average 1.6231617647058822) internal successors, (1766), 1092 states have internal predecessors, (1766), 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 15:31:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1771 transitions. [2021-12-17 15:31:51,457 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1771 transitions. Word has length 41 [2021-12-17 15:31:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:51,458 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1771 transitions. [2021-12-17 15:31:51,458 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 15:31:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1771 transitions. [2021-12-17 15:31:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 15:31:51,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:51,462 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 15:31:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:31:51,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -49710902, now seen corresponding path program 1 times [2021-12-17 15:31:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315340881] [2021-12-17 15:31:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:51,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:51,518 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 15:31:51,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315340881] [2021-12-17 15:31:51,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315340881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:51,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:51,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:31:51,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550718169] [2021-12-17 15:31:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:31:51,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:51,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:31:51,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:31:51,520 INFO L87 Difference]: Start difference. First operand 1094 states and 1771 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 15:31:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:51,770 INFO L93 Difference]: Finished difference Result 3018 states and 4863 transitions. [2021-12-17 15:31:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:31:51,771 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 15:31:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:51,777 INFO L225 Difference]: With dead ends: 3018 [2021-12-17 15:31:51,777 INFO L226 Difference]: Without dead ends: 1949 [2021-12-17 15:31:51,779 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 15:31:51,786 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 588 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1586 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 15:31:51,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1586 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:31:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-12-17 15:31:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1716. [2021-12-17 15:31:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1710 states have (on average 1.5988304093567252) internal successors, (2734), 1714 states have internal predecessors, (2734), 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 15:31:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2739 transitions. [2021-12-17 15:31:51,856 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2739 transitions. Word has length 48 [2021-12-17 15:31:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:51,856 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 2739 transitions. [2021-12-17 15:31:51,857 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 15:31:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2739 transitions. [2021-12-17 15:31:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 15:31:51,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:51,858 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 15:31:51,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:31:51,858 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798880, now seen corresponding path program 1 times [2021-12-17 15:31:51,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:51,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102631118] [2021-12-17 15:31:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:51,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:51,936 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 15:31:51,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:51,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102631118] [2021-12-17 15:31:51,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102631118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:51,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:51,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:31:51,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566034812] [2021-12-17 15:31:51,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:51,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:31:51,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:31:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:31:51,937 INFO L87 Difference]: Start difference. First operand 1716 states and 2739 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 15:31:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:52,275 INFO L93 Difference]: Finished difference Result 5101 states and 8048 transitions. [2021-12-17 15:31:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:31:52,276 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 15:31:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:52,285 INFO L225 Difference]: With dead ends: 5101 [2021-12-17 15:31:52,285 INFO L226 Difference]: Without dead ends: 3404 [2021-12-17 15:31:52,287 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 15:31:52,288 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 750 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:31:52,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1077 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:31:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-12-17 15:31:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3026. [2021-12-17 15:31:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.57317880794702) internal successors, (4751), 3024 states have internal predecessors, (4751), 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 15:31:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4756 transitions. [2021-12-17 15:31:52,370 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4756 transitions. Word has length 53 [2021-12-17 15:31:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:52,372 INFO L470 AbstractCegarLoop]: Abstraction has 3026 states and 4756 transitions. [2021-12-17 15:31:52,372 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 15:31:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4756 transitions. [2021-12-17 15:31:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 15:31:52,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:52,374 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 15:31:52,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:31:52,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985257, now seen corresponding path program 1 times [2021-12-17 15:31:52,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:52,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645155223] [2021-12-17 15:31:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:52,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:52,401 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 15:31:52,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:52,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645155223] [2021-12-17 15:31:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645155223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:52,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:52,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:52,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937989291] [2021-12-17 15:31:52,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:52,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:52,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:52,403 INFO L87 Difference]: Start difference. First operand 3026 states and 4756 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 15:31:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:52,505 INFO L93 Difference]: Finished difference Result 7113 states and 11141 transitions. [2021-12-17 15:31:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:52,505 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 15:31:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:52,516 INFO L225 Difference]: With dead ends: 7113 [2021-12-17 15:31:52,516 INFO L226 Difference]: Without dead ends: 4110 [2021-12-17 15:31:52,520 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 15:31:52,520 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 372 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 720 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 15:31:52,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 720 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-12-17 15:31:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3926. [2021-12-17 15:31:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3920 states have (on average 1.5543367346938775) internal successors, (6093), 3924 states have internal predecessors, (6093), 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 15:31:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 6098 transitions. [2021-12-17 15:31:52,630 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 6098 transitions. Word has length 53 [2021-12-17 15:31:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:52,631 INFO L470 AbstractCegarLoop]: Abstraction has 3926 states and 6098 transitions. [2021-12-17 15:31:52,631 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 15:31:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 6098 transitions. [2021-12-17 15:31:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 15:31:52,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:52,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:31:52,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:31:52,634 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1585990245, now seen corresponding path program 1 times [2021-12-17 15:31:52,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574123569] [2021-12-17 15:31:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:52,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:52,667 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 15:31:52,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574123569] [2021-12-17 15:31:52,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574123569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:52,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:52,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:52,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912368389] [2021-12-17 15:31:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:52,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:52,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:52,670 INFO L87 Difference]: Start difference. First operand 3926 states and 6098 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:31:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:52,931 INFO L93 Difference]: Finished difference Result 9442 states and 14788 transitions. [2021-12-17 15:31:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-17 15:31:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:52,951 INFO L225 Difference]: With dead ends: 9442 [2021-12-17 15:31:52,951 INFO L226 Difference]: Without dead ends: 5539 [2021-12-17 15:31:52,958 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 15:31:52,959 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 254 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 889 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 15:31:52,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 889 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:31:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-12-17 15:31:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4758. [2021-12-17 15:31:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4752 states have (on average 1.4983164983164983) internal successors, (7120), 4756 states have internal predecessors, (7120), 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 15:31:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7125 transitions. [2021-12-17 15:31:53,094 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7125 transitions. Word has length 61 [2021-12-17 15:31:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:53,095 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 7125 transitions. [2021-12-17 15:31:53,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:31:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7125 transitions. [2021-12-17 15:31:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 15:31:53,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:53,111 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] [2021-12-17 15:31:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:31:53,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1564004079, now seen corresponding path program 1 times [2021-12-17 15:31:53,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:53,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133037237] [2021-12-17 15:31:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:53,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:53,168 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 15:31:53,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133037237] [2021-12-17 15:31:53,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133037237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:53,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:53,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:53,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362244037] [2021-12-17 15:31:53,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:53,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:53,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:53,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:53,170 INFO L87 Difference]: Start difference. First operand 4758 states and 7125 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:31:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:53,307 INFO L93 Difference]: Finished difference Result 9359 states and 14027 transitions. [2021-12-17 15:31:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 63 [2021-12-17 15:31:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:53,322 INFO L225 Difference]: With dead ends: 9359 [2021-12-17 15:31:53,322 INFO L226 Difference]: Without dead ends: 4624 [2021-12-17 15:31:53,328 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 15:31:53,328 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 349 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 447 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 15:31:53,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 447 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-12-17 15:31:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 4624. [2021-12-17 15:31:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4618 states have (on average 1.4766132524902555) internal successors, (6819), 4622 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:31:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 6824 transitions. [2021-12-17 15:31:53,460 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 6824 transitions. Word has length 63 [2021-12-17 15:31:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:53,460 INFO L470 AbstractCegarLoop]: Abstraction has 4624 states and 6824 transitions. [2021-12-17 15:31:53,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 15:31:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 6824 transitions. [2021-12-17 15:31:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 15:31:53,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:53,464 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 15:31:53,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:31:53,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 357537147, now seen corresponding path program 1 times [2021-12-17 15:31:53,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:53,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097419087] [2021-12-17 15:31:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:53,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:53,493 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 15:31:53,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097419087] [2021-12-17 15:31:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097419087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:53,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:53,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:53,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406459929] [2021-12-17 15:31:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:53,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:53,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:53,494 INFO L87 Difference]: Start difference. First operand 4624 states and 6824 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 15:31:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:53,640 INFO L93 Difference]: Finished difference Result 9892 states and 14766 transitions. [2021-12-17 15:31:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:53,641 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 15:31:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:53,666 INFO L225 Difference]: With dead ends: 9892 [2021-12-17 15:31:53,666 INFO L226 Difference]: Without dead ends: 5291 [2021-12-17 15:31:53,672 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 15:31:53,674 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 313 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1010 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 15:31:53,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1010 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-12-17 15:31:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3550. [2021-12-17 15:31:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3544 states have (on average 1.4923814898419865) internal successors, (5289), 3548 states have internal predecessors, (5289), 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 15:31:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5294 transitions. [2021-12-17 15:31:53,792 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5294 transitions. Word has length 64 [2021-12-17 15:31:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:53,793 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 5294 transitions. [2021-12-17 15:31:53,793 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 15:31:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5294 transitions. [2021-12-17 15:31:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:31:53,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:53,794 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] [2021-12-17 15:31:53,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:31:53,794 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash 550768718, now seen corresponding path program 1 times [2021-12-17 15:31:53,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:53,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222183907] [2021-12-17 15:31:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:53,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:53,845 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 15:31:53,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:53,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222183907] [2021-12-17 15:31:53,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222183907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:53,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:53,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:31:53,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092555017] [2021-12-17 15:31:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:31:53,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:31:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:31:53,847 INFO L87 Difference]: Start difference. First operand 3550 states and 5294 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 15:31:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:54,575 INFO L93 Difference]: Finished difference Result 16792 states and 24825 transitions. [2021-12-17 15:31:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:31:54,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 66 [2021-12-17 15:31:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:54,596 INFO L225 Difference]: With dead ends: 16792 [2021-12-17 15:31:54,597 INFO L226 Difference]: Without dead ends: 13467 [2021-12-17 15:31:54,603 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 15:31:54,604 INFO L933 BasicCegarLoop]: 1074 mSDtfsCounter, 2131 mSDsluCounter, 2969 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2131 SdHoareTripleChecker+Valid, 4043 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:31:54,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2131 Valid, 4043 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:31:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-12-17 15:31:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 4420. [2021-12-17 15:31:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4414 states have (on average 1.4841413683733575) internal successors, (6551), 4418 states have internal predecessors, (6551), 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 15:31:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6556 transitions. [2021-12-17 15:31:54,818 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6556 transitions. Word has length 66 [2021-12-17 15:31:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:54,818 INFO L470 AbstractCegarLoop]: Abstraction has 4420 states and 6556 transitions. [2021-12-17 15:31:54,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 15:31:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6556 transitions. [2021-12-17 15:31:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:31:54,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:54,820 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 15:31:54,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:31:54,820 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1157262175, now seen corresponding path program 1 times [2021-12-17 15:31:54,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391898] [2021-12-17 15:31:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:54,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:54,875 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 15:31:54,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:54,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391898] [2021-12-17 15:31:54,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003391898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:54,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:54,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:31:54,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913041212] [2021-12-17 15:31:54,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:54,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:31:54,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:31:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:31:54,881 INFO L87 Difference]: Start difference. First operand 4420 states and 6556 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 15:31:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:55,957 INFO L93 Difference]: Finished difference Result 30445 states and 44831 transitions. [2021-12-17 15:31:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 15:31:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 15:31:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:56,012 INFO L225 Difference]: With dead ends: 30445 [2021-12-17 15:31:56,013 INFO L226 Difference]: Without dead ends: 26250 [2021-12-17 15:31:56,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:31:56,028 INFO L933 BasicCegarLoop]: 1885 mSDtfsCounter, 3829 mSDsluCounter, 6792 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 8677 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:31:56,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3829 Valid, 8677 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:31:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26250 states. [2021-12-17 15:31:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26250 to 4730. [2021-12-17 15:31:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4724 states have (on average 1.4739627434377647) internal successors, (6963), 4728 states have internal predecessors, (6963), 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 15:31:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 6968 transitions. [2021-12-17 15:31:56,376 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 6968 transitions. Word has length 67 [2021-12-17 15:31:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:56,376 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 6968 transitions. [2021-12-17 15:31:56,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 15:31:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 6968 transitions. [2021-12-17 15:31:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:31:56,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:56,379 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 15:31:56,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:31:56,379 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash 587846131, now seen corresponding path program 1 times [2021-12-17 15:31:56,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:56,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725626247] [2021-12-17 15:31:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:56,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:56,399 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 15:31:56,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725626247] [2021-12-17 15:31:56,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725626247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:56,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:56,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:56,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744315126] [2021-12-17 15:31:56,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:56,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:56,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:56,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:56,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:56,401 INFO L87 Difference]: Start difference. First operand 4730 states and 6968 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 15:31:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:56,599 INFO L93 Difference]: Finished difference Result 9971 states and 14664 transitions. [2021-12-17 15:31:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:56,600 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 15:31:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:56,608 INFO L225 Difference]: With dead ends: 9971 [2021-12-17 15:31:56,608 INFO L226 Difference]: Without dead ends: 5262 [2021-12-17 15:31:56,614 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 15:31:56,615 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 139 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 826 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 15:31:56,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 826 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2021-12-17 15:31:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5188. [2021-12-17 15:31:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5182 states have (on average 1.4698957931300656) internal successors, (7617), 5186 states have internal predecessors, (7617), 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 15:31:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 7622 transitions. [2021-12-17 15:31:56,774 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 7622 transitions. Word has length 79 [2021-12-17 15:31:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:56,774 INFO L470 AbstractCegarLoop]: Abstraction has 5188 states and 7622 transitions. [2021-12-17 15:31:56,775 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 15:31:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 7622 transitions. [2021-12-17 15:31:56,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 15:31:56,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:56,777 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 15:31:56,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 15:31:56,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash -880253353, now seen corresponding path program 1 times [2021-12-17 15:31:56,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:56,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898456875] [2021-12-17 15:31:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:56,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:56,797 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 15:31:56,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898456875] [2021-12-17 15:31:56,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898456875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:56,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:56,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:31:56,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255114763] [2021-12-17 15:31:56,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:56,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:31:56,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:31:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:31:56,799 INFO L87 Difference]: Start difference. First operand 5188 states and 7622 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 15:31:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:57,240 INFO L93 Difference]: Finished difference Result 13874 states and 20224 transitions. [2021-12-17 15:31:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:31:57,241 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 15:31:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:57,256 INFO L225 Difference]: With dead ends: 13874 [2021-12-17 15:31:57,256 INFO L226 Difference]: Without dead ends: 8585 [2021-12-17 15:31:57,261 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 15:31:57,262 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 654 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:31:57,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 1276 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:31:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-12-17 15:31:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7651. [2021-12-17 15:31:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 7645 states have (on average 1.4395029431000654) internal successors, (11005), 7649 states have internal predecessors, (11005), 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 15:31:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11010 transitions. [2021-12-17 15:31:57,502 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11010 transitions. Word has length 91 [2021-12-17 15:31:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:57,503 INFO L470 AbstractCegarLoop]: Abstraction has 7651 states and 11010 transitions. [2021-12-17 15:31:57,503 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 15:31:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11010 transitions. [2021-12-17 15:31:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 15:31:57,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:57,505 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 15:31:57,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 15:31:57,505 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1094322202, now seen corresponding path program 1 times [2021-12-17 15:31:57,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:57,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986508873] [2021-12-17 15:31:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:57,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:57,530 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 15:31:57,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986508873] [2021-12-17 15:31:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986508873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:57,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:57,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:31:57,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528022420] [2021-12-17 15:31:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:57,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:57,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:57,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:31:57,536 INFO L87 Difference]: Start difference. First operand 7651 states and 11010 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 15:31:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:57,681 INFO L93 Difference]: Finished difference Result 11033 states and 15906 transitions. [2021-12-17 15:31:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:57,682 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 15:31:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:57,687 INFO L225 Difference]: With dead ends: 11033 [2021-12-17 15:31:57,687 INFO L226 Difference]: Without dead ends: 3385 [2021-12-17 15:31:57,694 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 15:31:57,696 INFO L933 BasicCegarLoop]: 446 mSDtfsCounter, 343 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 525 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 15:31:57,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 525 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2021-12-17 15:31:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3332. [2021-12-17 15:31:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3326 states have (on average 1.34996993385448) internal successors, (4490), 3330 states have internal predecessors, (4490), 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 15:31:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4495 transitions. [2021-12-17 15:31:57,829 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4495 transitions. Word has length 99 [2021-12-17 15:31:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:57,829 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 4495 transitions. [2021-12-17 15:31:57,829 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 15:31:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4495 transitions. [2021-12-17 15:31:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 15:31:57,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:57,831 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 15:31:57,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 15:31:57,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1249050813, now seen corresponding path program 1 times [2021-12-17 15:31:57,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027560525] [2021-12-17 15:31:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:57,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:57,858 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 15:31:57,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027560525] [2021-12-17 15:31:57,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027560525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:57,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:31:57,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:31:57,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961073393] [2021-12-17 15:31:57,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:57,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:31:57,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:31:57,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:31:57,860 INFO L87 Difference]: Start difference. First operand 3332 states and 4495 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 15:31:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:58,250 INFO L93 Difference]: Finished difference Result 12736 states and 17172 transitions. [2021-12-17 15:31:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:31:58,251 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 15:31:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:58,267 INFO L225 Difference]: With dead ends: 12736 [2021-12-17 15:31:58,267 INFO L226 Difference]: Without dead ends: 9581 [2021-12-17 15:31:58,275 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 15:31:58,276 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 1548 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 3412 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 15:31:58,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1548 Valid, 3412 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:31:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-12-17 15:31:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 3334. [2021-12-17 15:31:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3328 states have (on average 1.3479567307692308) internal successors, (4486), 3332 states have internal predecessors, (4486), 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 15:31:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 4491 transitions. [2021-12-17 15:31:58,429 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 4491 transitions. Word has length 101 [2021-12-17 15:31:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:58,429 INFO L470 AbstractCegarLoop]: Abstraction has 3334 states and 4491 transitions. [2021-12-17 15:31:58,429 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 15:31:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 4491 transitions. [2021-12-17 15:31:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 15:31:58,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:58,430 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 15:31:58,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 15:31:58,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2071034270, now seen corresponding path program 1 times [2021-12-17 15:31:58,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220703290] [2021-12-17 15:31:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:58,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:58,464 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 15:31:58,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:58,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220703290] [2021-12-17 15:31:58,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220703290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:31:58,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332670330] [2021-12-17 15:31:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:58,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:31:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:31:58,468 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 15:31:58,469 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 15:31:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:31:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:31:58,792 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 15:31:58,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:31:58,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332670330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:58,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:31:58,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:31:58,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791372568] [2021-12-17 15:31:58,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:58,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:58,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:58,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:58,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:31:58,794 INFO L87 Difference]: Start difference. First operand 3334 states and 4491 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 15:31:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:58,985 INFO L93 Difference]: Finished difference Result 3977 states and 5352 transitions. [2021-12-17 15:31:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:58,986 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 15:31:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:58,992 INFO L225 Difference]: With dead ends: 3977 [2021-12-17 15:31:58,992 INFO L226 Difference]: Without dead ends: 3973 [2021-12-17 15:31:58,993 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 15:31:58,994 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 237 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 811 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 15:31:58,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 811 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-12-17 15:31:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3923. [2021-12-17 15:31:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3917 states have (on average 1.34516211386265) internal successors, (5269), 3921 states have internal predecessors, (5269), 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 15:31:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5274 transitions. [2021-12-17 15:31:59,193 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5274 transitions. Word has length 103 [2021-12-17 15:31:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:31:59,193 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 5274 transitions. [2021-12-17 15:31:59,194 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 15:31:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5274 transitions. [2021-12-17 15:31:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 15:31:59,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:31:59,197 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] [2021-12-17 15:31:59,217 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 15:31:59,411 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 15:31:59,412 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:31:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:31:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash -62225411, now seen corresponding path program 1 times [2021-12-17 15:31:59,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:31:59,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087963963] [2021-12-17 15:31:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:59,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:31:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:59,451 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 15:31:59,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:31:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087963963] [2021-12-17 15:31:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087963963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:31:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40977292] [2021-12-17 15:31:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:31:59,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:31:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:31:59,453 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 15:31:59,475 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 15:31:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:31:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:31:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:31:59,773 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 15:31:59,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:31:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40977292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:31:59,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:31:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:31:59,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287022705] [2021-12-17 15:31:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:31:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:31:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:31:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:31:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:31:59,776 INFO L87 Difference]: Start difference. First operand 3923 states and 5274 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 15:31:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:31:59,946 INFO L93 Difference]: Finished difference Result 6990 states and 9448 transitions. [2021-12-17 15:31:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:31:59,946 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 159 [2021-12-17 15:31:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:31:59,952 INFO L225 Difference]: With dead ends: 6990 [2021-12-17 15:31:59,952 INFO L226 Difference]: Without dead ends: 3072 [2021-12-17 15:31:59,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 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 15:31:59,957 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 268 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 426 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 15:31:59,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 426 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:31:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-12-17 15:32:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2850. [2021-12-17 15:32:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.3259493670886076) internal successors, (3771), 2848 states have internal predecessors, (3771), 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 15:32:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3776 transitions. [2021-12-17 15:32:00,107 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3776 transitions. Word has length 159 [2021-12-17 15:32:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:00,107 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3776 transitions. [2021-12-17 15:32:00,107 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 15:32:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3776 transitions. [2021-12-17 15:32:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 15:32:00,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:00,109 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] [2021-12-17 15:32:00,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:00,323 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 15:32:00,324 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash 397670283, now seen corresponding path program 1 times [2021-12-17 15:32:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:00,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798176340] [2021-12-17 15:32:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:00,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:00,363 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 15:32:00,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:00,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798176340] [2021-12-17 15:32:00,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798176340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:00,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979010238] [2021-12-17 15:32:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:00,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:00,364 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 15:32:00,365 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 15:32:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:00,638 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 15:32:00,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:00,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979010238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:00,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:00,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:00,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120699025] [2021-12-17 15:32:00,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:00,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:00,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:00,639 INFO L87 Difference]: Start difference. First operand 2850 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 15:32:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:00,802 INFO L93 Difference]: Finished difference Result 5528 states and 7365 transitions. [2021-12-17 15:32:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 162 [2021-12-17 15:32:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:00,806 INFO L225 Difference]: With dead ends: 5528 [2021-12-17 15:32:00,806 INFO L226 Difference]: Without dead ends: 2850 [2021-12-17 15:32:00,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 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 15:32:00,810 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 278 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 398 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 15:32:00,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 398 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-12-17 15:32:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2850. [2021-12-17 15:32:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2844 states have (on average 1.2921940928270041) internal successors, (3675), 2848 states have internal predecessors, (3675), 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 15:32:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 3680 transitions. [2021-12-17 15:32:00,957 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 3680 transitions. Word has length 162 [2021-12-17 15:32:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:00,958 INFO L470 AbstractCegarLoop]: Abstraction has 2850 states and 3680 transitions. [2021-12-17 15:32:00,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 15:32:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 3680 transitions. [2021-12-17 15:32:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 15:32:00,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:00,960 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] [2021-12-17 15:32:00,979 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 15:32:01,175 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 15:32:01,176 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash -276776698, now seen corresponding path program 1 times [2021-12-17 15:32:01,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241689970] [2021-12-17 15:32:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:01,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:01,211 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 15:32:01,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241689970] [2021-12-17 15:32:01,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241689970] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900429481] [2021-12-17 15:32:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:01,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:01,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:01,212 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 15:32:01,213 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 15:32:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 15:32:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:01,446 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 15:32:01,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:01,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900429481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:01,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:01,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 15:32:01,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356741499] [2021-12-17 15:32:01,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:01,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:32:01,448 INFO L87 Difference]: Start difference. First operand 2850 states and 3680 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 15:32:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:01,757 INFO L93 Difference]: Finished difference Result 6447 states and 8490 transitions. [2021-12-17 15:32:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 15:32:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:01,762 INFO L225 Difference]: With dead ends: 6447 [2021-12-17 15:32:01,762 INFO L226 Difference]: Without dead ends: 3769 [2021-12-17 15:32:01,764 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 15:32:01,765 INFO L933 BasicCegarLoop]: 451 mSDtfsCounter, 209 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:01,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 674 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-12-17 15:32:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3681. [2021-12-17 15:32:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3675 states have (on average 1.2612244897959184) internal successors, (4635), 3679 states have internal predecessors, (4635), 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 15:32:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4640 transitions. [2021-12-17 15:32:01,908 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4640 transitions. Word has length 163 [2021-12-17 15:32:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:01,910 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 4640 transitions. [2021-12-17 15:32:01,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 15:32:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4640 transitions. [2021-12-17 15:32:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 15:32:01,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:01,911 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] [2021-12-17 15:32:01,930 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 15:32:02,127 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 15:32:02,127 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:02,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1158970864, now seen corresponding path program 1 times [2021-12-17 15:32:02,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:02,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423155868] [2021-12-17 15:32:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:02,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:02,232 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 15:32:02,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423155868] [2021-12-17 15:32:02,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423155868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552385876] [2021-12-17 15:32:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:02,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:02,233 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 15:32:02,234 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 15:32:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:32:02,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:02,709 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 15:32:02,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:03,053 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 15:32:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552385876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:03,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:03,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-17 15:32:03,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324329099] [2021-12-17 15:32:03,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:32:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:32:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:32:03,054 INFO L87 Difference]: Start difference. First operand 3681 states and 4640 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 15:32:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:04,217 INFO L93 Difference]: Finished difference Result 18486 states and 23395 transitions. [2021-12-17 15:32:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 15:32:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 165 [2021-12-17 15:32:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:04,240 INFO L225 Difference]: With dead ends: 18486 [2021-12-17 15:32:04,240 INFO L226 Difference]: Without dead ends: 14977 [2021-12-17 15:32:04,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 341 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 15:32:04,249 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 4143 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4143 SdHoareTripleChecker+Valid, 5679 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:04,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4143 Valid, 5679 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:32:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14977 states. [2021-12-17 15:32:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14977 to 5218. [2021-12-17 15:32:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5212 states have (on average 1.266308518802763) internal successors, (6600), 5216 states have internal predecessors, (6600), 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 15:32:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6605 transitions. [2021-12-17 15:32:04,569 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6605 transitions. Word has length 165 [2021-12-17 15:32:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 5218 states and 6605 transitions. [2021-12-17 15:32:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 15:32:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6605 transitions. [2021-12-17 15:32:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-12-17 15:32:04,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:04,571 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] [2021-12-17 15:32:04,590 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 15:32:04,783 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 15:32:04,783 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1576222772, now seen corresponding path program 1 times [2021-12-17 15:32:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83293118] [2021-12-17 15:32:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:04,910 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 15:32:04,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83293118] [2021-12-17 15:32:04,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83293118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100778431] [2021-12-17 15:32:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:04,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:04,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:04,912 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 15:32:04,913 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 15:32:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:05,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:32:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:05,739 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 15:32:05,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:06,362 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 15:32:06,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100778431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:06,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:06,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-17 15:32:06,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995422553] [2021-12-17 15:32:06,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:06,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:32:06,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:32:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:32:06,365 INFO L87 Difference]: Start difference. First operand 5218 states and 6605 transitions. Second operand has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 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 15:32:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:08,103 INFO L93 Difference]: Finished difference Result 24064 states and 30364 transitions. [2021-12-17 15:32:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 15:32:08,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-12-17 15:32:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:08,130 INFO L225 Difference]: With dead ends: 24064 [2021-12-17 15:32:08,130 INFO L226 Difference]: Without dead ends: 19018 [2021-12-17 15:32:08,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 545 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 15:32:08,139 INFO L933 BasicCegarLoop]: 1480 mSDtfsCounter, 5787 mSDsluCounter, 10268 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5787 SdHoareTripleChecker+Valid, 11748 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:08,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5787 Valid, 11748 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:32:08,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19018 states. [2021-12-17 15:32:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19018 to 6629. [2021-12-17 15:32:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6623 states have (on average 1.2675524686697872) internal successors, (8395), 6627 states have internal predecessors, (8395), 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 15:32:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 8400 transitions. [2021-12-17 15:32:08,560 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 8400 transitions. Word has length 265 [2021-12-17 15:32:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:08,560 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 8400 transitions. [2021-12-17 15:32:08,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.545454545454547) internal successors, (259), 11 states have internal predecessors, (259), 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 15:32:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 8400 transitions. [2021-12-17 15:32:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-12-17 15:32:08,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:08,563 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] [2021-12-17 15:32:08,583 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 15:32:08,779 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 15:32:08,780 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1321811141, now seen corresponding path program 1 times [2021-12-17 15:32:08,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:08,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374175936] [2021-12-17 15:32:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 129 proven. 343 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:32:08,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:08,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374175936] [2021-12-17 15:32:08,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374175936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:08,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926170909] [2021-12-17 15:32:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:08,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:08,979 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 15:32:08,980 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 15:32:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:32:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:09,776 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 15:32:09,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:10,390 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 15:32:10,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926170909] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:10,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:10,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 18 [2021-12-17 15:32:10,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423081743] [2021-12-17 15:32:10,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:10,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 15:32:10,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:10,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 15:32:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-17 15:32:10,393 INFO L87 Difference]: Start difference. First operand 6629 states and 8400 transitions. Second operand has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 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 15:32:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:13,371 INFO L93 Difference]: Finished difference Result 30775 states and 38839 transitions. [2021-12-17 15:32:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-17 15:32:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 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 366 [2021-12-17 15:32:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:13,400 INFO L225 Difference]: With dead ends: 30775 [2021-12-17 15:32:13,400 INFO L226 Difference]: Without dead ends: 24318 [2021-12-17 15:32:13,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 755 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 15:32:13,414 INFO L933 BasicCegarLoop]: 2068 mSDtfsCounter, 14942 mSDsluCounter, 18769 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14942 SdHoareTripleChecker+Valid, 20837 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:13,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14942 Valid, 20837 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 15:32:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24318 states. [2021-12-17 15:32:14,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24318 to 7881. [2021-12-17 15:32:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7875 states have (on average 1.2702222222222221) internal successors, (10003), 7879 states have internal predecessors, (10003), 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 15:32:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 10008 transitions. [2021-12-17 15:32:14,058 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 10008 transitions. Word has length 366 [2021-12-17 15:32:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:14,058 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 10008 transitions. [2021-12-17 15:32:14,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 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 15:32:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 10008 transitions. [2021-12-17 15:32:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 15:32:14,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:14,062 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:14,079 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 15:32:14,274 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 15:32:14,275 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 282578174, now seen corresponding path program 1 times [2021-12-17 15:32:14,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544167038] [2021-12-17 15:32:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:14,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-17 15:32:14,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544167038] [2021-12-17 15:32:14,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544167038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:14,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:14,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:32:14,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219714001] [2021-12-17 15:32:14,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:14,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:32:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:32:14,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:32:14,341 INFO L87 Difference]: Start difference. First operand 7881 states and 10008 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 15:32:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:14,539 INFO L93 Difference]: Finished difference Result 9534 states and 11897 transitions. [2021-12-17 15:32:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:32:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 15:32:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:14,541 INFO L225 Difference]: With dead ends: 9534 [2021-12-17 15:32:14,542 INFO L226 Difference]: Without dead ends: 1709 [2021-12-17 15:32:14,547 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 15:32:14,548 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 138 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 404 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-12-17 15:32:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1114. [2021-12-17 15:32:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1110 states have (on average 1.0738738738738738) internal successors, (1192), 1112 states have internal predecessors, (1192), 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 15:32:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1195 transitions. [2021-12-17 15:32:14,637 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1195 transitions. Word has length 469 [2021-12-17 15:32:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:14,638 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1195 transitions. [2021-12-17 15:32:14,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 15:32:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1195 transitions. [2021-12-17 15:32:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-17 15:32:14,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:14,641 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:14,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 15:32:14,641 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1243077896, now seen corresponding path program 1 times [2021-12-17 15:32:14,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:14,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330081964] [2021-12-17 15:32:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:14,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-17 15:32:14,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:14,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330081964] [2021-12-17 15:32:14,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330081964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:14,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:14,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:32:14,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393731199] [2021-12-17 15:32:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:32:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:32:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:32:14,713 INFO L87 Difference]: Start difference. First operand 1114 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 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 15:32:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:14,978 INFO L93 Difference]: Finished difference Result 2274 states and 2487 transitions. [2021-12-17 15:32:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:32:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 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 470 [2021-12-17 15:32:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:14,980 INFO L225 Difference]: With dead ends: 2274 [2021-12-17 15:32:14,980 INFO L226 Difference]: Without dead ends: 2067 [2021-12-17 15:32:14,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:32:14,981 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 920 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2514 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:14,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2514 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-12-17 15:32:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1181. [2021-12-17 15:32:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1177 states have (on average 1.0756159728122345) internal successors, (1266), 1179 states have internal predecessors, (1266), 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 15:32:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1269 transitions. [2021-12-17 15:32:15,076 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1269 transitions. Word has length 470 [2021-12-17 15:32:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:15,076 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1269 transitions. [2021-12-17 15:32:15,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 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 15:32:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1269 transitions. [2021-12-17 15:32:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-17 15:32:15,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:15,079 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 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, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:15,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 15:32:15,079 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1382591989, now seen corresponding path program 1 times [2021-12-17 15:32:15,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586886632] [2021-12-17 15:32:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:15,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2021-12-17 15:32:15,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586886632] [2021-12-17 15:32:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586886632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:15,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:32:15,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:32:15,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324421355] [2021-12-17 15:32:15,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:15,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:32:15,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:32:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:32:15,140 INFO L87 Difference]: Start difference. First operand 1181 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 15:32:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:15,279 INFO L93 Difference]: Finished difference Result 1558 states and 1691 transitions. [2021-12-17 15:32:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:32:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 471 [2021-12-17 15:32:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:15,280 INFO L225 Difference]: With dead ends: 1558 [2021-12-17 15:32:15,280 INFO L226 Difference]: Without dead ends: 1351 [2021-12-17 15:32:15,281 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 15:32:15,281 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 448 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 937 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 15:32:15,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 937 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:32:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-12-17 15:32:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1168. [2021-12-17 15:32:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1165 states have (on average 1.0643776824034334) internal successors, (1240), 1166 states have internal predecessors, (1240), 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 15:32:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1242 transitions. [2021-12-17 15:32:15,373 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1242 transitions. Word has length 471 [2021-12-17 15:32:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:15,373 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1242 transitions. [2021-12-17 15:32:15,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 15:32:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1242 transitions. [2021-12-17 15:32:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-12-17 15:32:15,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:15,376 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 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, 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, 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] [2021-12-17 15:32:15,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 15:32:15,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 281790686, now seen corresponding path program 1 times [2021-12-17 15:32:15,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787318573] [2021-12-17 15:32:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:15,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 94 proven. 316 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-12-17 15:32:15,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787318573] [2021-12-17 15:32:15,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787318573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:15,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770703213] [2021-12-17 15:32:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:15,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:15,700 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 15:32:15,700 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 15:32:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 15:32:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 96 proven. 263 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-12-17 15:32:16,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 25 proven. 334 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-12-17 15:32:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770703213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:17,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:17,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-17 15:32:17,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456558868] [2021-12-17 15:32:17,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:17,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 15:32:17,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 15:32:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:32:17,924 INFO L87 Difference]: Start difference. First operand 1168 states and 1242 transitions. Second operand has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 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 15:32:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:18,606 INFO L93 Difference]: Finished difference Result 1610 states and 1713 transitions. [2021-12-17 15:32:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 15:32:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 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 528 [2021-12-17 15:32:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:18,609 INFO L225 Difference]: With dead ends: 1610 [2021-12-17 15:32:18,609 INFO L226 Difference]: Without dead ends: 1607 [2021-12-17 15:32:18,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1046 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 15:32:18,610 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 2991 mSDsluCounter, 6205 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:18,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2991 Valid, 6602 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-12-17 15:32:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1268. [2021-12-17 15:32:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1265 states have (on average 1.0624505928853756) internal successors, (1344), 1266 states have internal predecessors, (1344), 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 15:32:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1346 transitions. [2021-12-17 15:32:18,723 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1346 transitions. Word has length 528 [2021-12-17 15:32:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:18,724 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1346 transitions. [2021-12-17 15:32:18,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.9) internal successors, (417), 30 states have internal predecessors, (417), 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 15:32:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1346 transitions. [2021-12-17 15:32:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-17 15:32:18,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:18,727 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:18,746 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 15:32:18,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 15:32:18,946 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1226769046, now seen corresponding path program 1 times [2021-12-17 15:32:18,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:18,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285610446] [2021-12-17 15:32:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:18,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-17 15:32:19,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285610446] [2021-12-17 15:32:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285610446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257559170] [2021-12-17 15:32:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:19,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:19,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:19,099 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 15:32:19,101 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 15:32:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:32:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-17 15:32:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 281 proven. 48 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2021-12-17 15:32:20,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257559170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:20,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:20,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-17 15:32:20,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868527046] [2021-12-17 15:32:20,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:20,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:32:20,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:32:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:32:20,648 INFO L87 Difference]: Start difference. First operand 1268 states and 1346 transitions. Second operand has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 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 15:32:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:21,052 INFO L93 Difference]: Finished difference Result 2125 states and 2270 transitions. [2021-12-17 15:32:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:32:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 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 577 [2021-12-17 15:32:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:21,054 INFO L225 Difference]: With dead ends: 2125 [2021-12-17 15:32:21,054 INFO L226 Difference]: Without dead ends: 1931 [2021-12-17 15:32:21,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1181 GetRequests, 1159 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 15:32:21,056 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 1150 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:21,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 3423 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-12-17 15:32:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1354. [2021-12-17 15:32:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1351 states have (on average 1.0621761658031088) internal successors, (1435), 1352 states have internal predecessors, (1435), 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 15:32:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1437 transitions. [2021-12-17 15:32:21,178 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1437 transitions. Word has length 577 [2021-12-17 15:32:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:21,178 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1437 transitions. [2021-12-17 15:32:21,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 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 15:32:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1437 transitions. [2021-12-17 15:32:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2021-12-17 15:32:21,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:21,182 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 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, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:32:21,205 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 15:32:21,391 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 15:32:21,392 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash 381551868, now seen corresponding path program 1 times [2021-12-17 15:32:21,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:21,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314192289] [2021-12-17 15:32:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:21,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 179 proven. 793 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-17 15:32:21,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:21,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314192289] [2021-12-17 15:32:21,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314192289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:21,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092932240] [2021-12-17 15:32:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:21,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:21,762 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 15:32:21,787 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 15:32:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 15:32:21,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 243 proven. 693 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-17 15:32:23,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 30 proven. 906 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-12-17 15:32:24,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092932240] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:24,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:24,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-17 15:32:24,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538848787] [2021-12-17 15:32:24,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:24,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:32:24,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:32:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 15:32:24,376 INFO L87 Difference]: Start difference. First operand 1354 states and 1437 transitions. Second operand has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 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 15:32:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:25,255 INFO L93 Difference]: Finished difference Result 1727 states and 1832 transitions. [2021-12-17 15:32:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 15:32:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 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 636 [2021-12-17 15:32:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:25,258 INFO L225 Difference]: With dead ends: 1727 [2021-12-17 15:32:25,258 INFO L226 Difference]: Without dead ends: 1724 [2021-12-17 15:32:25,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1335 GetRequests, 1267 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 15:32:25,260 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 3244 mSDsluCounter, 12582 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3244 SdHoareTripleChecker+Valid, 13218 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:25,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3244 Valid, 13218 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:32:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2021-12-17 15:32:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1454. [2021-12-17 15:32:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1451 states have (on average 1.0606478290833907) internal successors, (1539), 1452 states have internal predecessors, (1539), 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 15:32:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1541 transitions. [2021-12-17 15:32:25,396 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1541 transitions. Word has length 636 [2021-12-17 15:32:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:25,396 INFO L470 AbstractCegarLoop]: Abstraction has 1454 states and 1541 transitions. [2021-12-17 15:32:25,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.794117647058822) internal successors, (707), 34 states have internal predecessors, (707), 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 15:32:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1541 transitions. [2021-12-17 15:32:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-12-17 15:32:25,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:25,401 INFO L514 BasicCegarLoop]: trace histogram [13, 8, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:32:25,419 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 15:32:25,602 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 15:32:25,609 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 37600824, now seen corresponding path program 1 times [2021-12-17 15:32:25,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829947613] [2021-12-17 15:32:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:25,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-17 15:32:25,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:25,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829947613] [2021-12-17 15:32:25,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829947613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:25,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844857768] [2021-12-17 15:32:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:25,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:25,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:25,796 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 15:32:25,797 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 15:32:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:32:26,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-17 15:32:26,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 474 proven. 212 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2021-12-17 15:32:27,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844857768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:27,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:27,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-17 15:32:27,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691942855] [2021-12-17 15:32:27,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:32:27,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:32:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:32:27,851 INFO L87 Difference]: Start difference. First operand 1454 states and 1541 transitions. Second operand has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 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 15:32:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:28,326 INFO L93 Difference]: Finished difference Result 2323 states and 2481 transitions. [2021-12-17 15:32:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:32:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 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 685 [2021-12-17 15:32:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:28,329 INFO L225 Difference]: With dead ends: 2323 [2021-12-17 15:32:28,329 INFO L226 Difference]: Without dead ends: 2129 [2021-12-17 15:32:28,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1404 GetRequests, 1378 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 15:32:28,330 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 1427 mSDsluCounter, 5121 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 5823 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:28,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 5823 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-12-17 15:32:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1542. [2021-12-17 15:32:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1539 states have (on average 1.060428849902534) internal successors, (1632), 1540 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 15:32:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1634 transitions. [2021-12-17 15:32:28,482 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1634 transitions. Word has length 685 [2021-12-17 15:32:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:28,482 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 1634 transitions. [2021-12-17 15:32:28,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.18181818181818) internal successors, (387), 11 states have internal predecessors, (387), 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 15:32:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1634 transitions. [2021-12-17 15:32:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-12-17 15:32:28,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:28,487 INFO L514 BasicCegarLoop]: trace histogram [14, 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, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2021-12-17 15:32:28,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:28,688 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 15:32:28,688 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1036327175, now seen corresponding path program 1 times [2021-12-17 15:32:28,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714867474] [2021-12-17 15:32:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:28,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 136 proven. 1408 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-17 15:32:29,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714867474] [2021-12-17 15:32:29,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714867474] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876402355] [2021-12-17 15:32:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:29,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:29,117 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 15:32:29,118 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 15:32:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 15:32:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 298 proven. 1228 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 15:32:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 35 proven. 1491 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-17 15:32:32,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876402355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:32,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:32,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-12-17 15:32:32,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240616732] [2021-12-17 15:32:32,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:32,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 15:32:32,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 15:32:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 15:32:32,405 INFO L87 Difference]: Start difference. First operand 1542 states and 1634 transitions. Second operand has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 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 15:32:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:33,624 INFO L93 Difference]: Finished difference Result 2003 states and 2122 transitions. [2021-12-17 15:32:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 15:32:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 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 745 [2021-12-17 15:32:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:33,627 INFO L225 Difference]: With dead ends: 2003 [2021-12-17 15:32:33,627 INFO L226 Difference]: Without dead ends: 2000 [2021-12-17 15:32:33,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1567 GetRequests, 1485 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2021-12-17 15:32:33,629 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 3894 mSDsluCounter, 20858 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3894 SdHoareTripleChecker+Valid, 21738 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:33,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3894 Valid, 21738 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:32:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-12-17 15:32:33,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1642. [2021-12-17 15:32:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1639 states have (on average 1.0591824283099451) internal successors, (1736), 1640 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 15:32:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 1738 transitions. [2021-12-17 15:32:33,797 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 1738 transitions. Word has length 745 [2021-12-17 15:32:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:33,798 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 1738 transitions. [2021-12-17 15:32:33,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.5) internal successors, (1020), 40 states have internal predecessors, (1020), 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 15:32:33,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 1738 transitions. [2021-12-17 15:32:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-12-17 15:32:33,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:33,804 INFO L514 BasicCegarLoop]: trace histogram [15, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 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] [2021-12-17 15:32:33,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 15:32:34,009 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 15:32:34,009 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 502016475, now seen corresponding path program 1 times [2021-12-17 15:32:34,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:34,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248326541] [2021-12-17 15:32:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:34,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-17 15:32:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248326541] [2021-12-17 15:32:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248326541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052378947] [2021-12-17 15:32:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:34,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:34,235 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 15:32:34,237 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 15:32:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:32:34,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-17 15:32:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 667 proven. 493 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2021-12-17 15:32:36,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052378947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:36,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:36,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-17 15:32:36,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943167632] [2021-12-17 15:32:36,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:36,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 15:32:36,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:36,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 15:32:36,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:32:36,870 INFO L87 Difference]: Start difference. First operand 1642 states and 1738 transitions. Second operand has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 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 15:32:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:37,503 INFO L93 Difference]: Finished difference Result 2540 states and 2711 transitions. [2021-12-17 15:32:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 15:32:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 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 794 [2021-12-17 15:32:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:37,506 INFO L225 Difference]: With dead ends: 2540 [2021-12-17 15:32:37,506 INFO L226 Difference]: Without dead ends: 2346 [2021-12-17 15:32:37,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1628 GetRequests, 1597 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:32:37,507 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 1707 mSDsluCounter, 8166 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 9054 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:37,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1707 Valid, 9054 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:32:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-12-17 15:32:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1732. [2021-12-17 15:32:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1729 states have (on average 1.0589936379410063) internal successors, (1831), 1730 states have internal predecessors, (1831), 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 15:32:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 1833 transitions. [2021-12-17 15:32:37,689 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 1833 transitions. Word has length 794 [2021-12-17 15:32:37,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:37,689 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 1833 transitions. [2021-12-17 15:32:37,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.0) internal successors, (494), 13 states have internal predecessors, (494), 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 15:32:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 1833 transitions. [2021-12-17 15:32:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2021-12-17 15:32:37,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:37,696 INFO L514 BasicCegarLoop]: trace histogram [16, 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, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2021-12-17 15:32:37,713 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 15:32:37,897 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 15:32:37,898 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 720245394, now seen corresponding path program 1 times [2021-12-17 15:32:37,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:37,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632215600] [2021-12-17 15:32:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:37,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 93 proven. 2031 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 15:32:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632215600] [2021-12-17 15:32:38,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632215600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:38,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129761085] [2021-12-17 15:32:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:38,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:38,434 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 15:32:38,435 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 15:32:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 15:32:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 257 proven. 1867 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 15:32:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:32:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 40 proven. 2084 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 15:32:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129761085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:32:42,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:32:42,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 46 [2021-12-17 15:32:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95905228] [2021-12-17 15:32:42,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:32:42,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 15:32:42,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 15:32:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 15:32:42,625 INFO L87 Difference]: Start difference. First operand 1732 states and 1833 transitions. Second operand has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 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 15:32:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:44,818 INFO L93 Difference]: Finished difference Result 3370 states and 3566 transitions. [2021-12-17 15:32:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-17 15:32:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 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 855 [2021-12-17 15:32:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:44,823 INFO L225 Difference]: With dead ends: 3370 [2021-12-17 15:32:44,823 INFO L226 Difference]: Without dead ends: 3367 [2021-12-17 15:32:44,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1822 GetRequests, 1716 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=800, Invalid=9502, Unknown=0, NotChecked=0, Total=10302 [2021-12-17 15:32:44,826 INFO L933 BasicCegarLoop]: 1129 mSDtfsCounter, 5543 mSDsluCounter, 32788 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5543 SdHoareTripleChecker+Valid, 33917 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:44,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5543 Valid, 33917 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 15:32:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-12-17 15:32:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2662. [2021-12-17 15:32:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2659 states have (on average 1.055660022564874) internal successors, (2807), 2660 states have internal predecessors, (2807), 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 15:32:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 2809 transitions. [2021-12-17 15:32:45,131 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 2809 transitions. Word has length 855 [2021-12-17 15:32:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:45,131 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 2809 transitions. [2021-12-17 15:32:45,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 28.065217391304348) internal successors, (1291), 46 states have internal predecessors, (1291), 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 15:32:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 2809 transitions. [2021-12-17 15:32:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2021-12-17 15:32:45,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:32:45,139 INFO L514 BasicCegarLoop]: trace histogram [17, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 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, 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, 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] [2021-12-17 15:32:45,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 15:32:45,339 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 15:32:45,340 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:32:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:32:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -890984606, now seen corresponding path program 1 times [2021-12-17 15:32:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:32:45,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677041208] [2021-12-17 15:32:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:32:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 1408 proven. 344 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-12-17 15:32:45,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:32:45,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677041208] [2021-12-17 15:32:45,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677041208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:32:45,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026456234] [2021-12-17 15:32:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:32:45,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:32:45,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:32:45,515 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 15:32:45,516 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 15:32:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:32:45,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2412 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 15:32:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:32:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 1752 proven. 0 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-12-17 15:32:46,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:32:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026456234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:32:46,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:32:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 13 [2021-12-17 15:32:46,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744843482] [2021-12-17 15:32:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:32:46,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:32:46,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:32:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:32:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:32:46,775 INFO L87 Difference]: Start difference. First operand 2662 states and 2809 transitions. Second operand has 11 states, 11 states have (on average 54.72727272727273) internal successors, (602), 11 states have internal predecessors, (602), 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 15:32:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:32:47,077 INFO L93 Difference]: Finished difference Result 2686 states and 2833 transitions. [2021-12-17 15:32:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:32:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 54.72727272727273) internal successors, (602), 11 states have internal predecessors, (602), 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 904 [2021-12-17 15:32:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:32:47,078 INFO L225 Difference]: With dead ends: 2686 [2021-12-17 15:32:47,078 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 15:32:47,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-12-17 15:32:47,081 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1159 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:32:47,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 2831 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:32:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 15:32:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 15:32:47,081 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 15:32:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 15:32:47,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 904 [2021-12-17 15:32:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:32:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 15:32:47,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 54.72727272727273) internal successors, (602), 11 states have internal predecessors, (602), 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 15:32:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 15:32:47,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 15:32:47,083 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 15:32:47,104 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 15:32:47,299 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 15:32:47,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 15:34:08,984 WARN L227 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 203 DAG size of output: 199 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-17 15:35:31,164 WARN L227 SmtUtils]: Spent 1.37m on a formula simplification. DAG size of input: 203 DAG size of output: 199 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-17 15:35:37,665 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 164 DAG size of output: 158 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15