./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.3.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 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:21:28,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:21:28,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:21:28,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:21:28,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:21:28,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:21:28,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:21:28,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:21:28,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:21:28,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:21:28,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:21:28,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:21:28,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:21:28,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:21:28,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:21:28,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:21:28,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:21:28,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:21:28,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:21:28,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:21:28,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:21:28,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:21:28,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:21:28,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:21:28,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:21:28,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:21:28,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:21:28,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:21:28,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:21:28,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:21:28,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:21:28,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:21:28,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:21:28,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:21:28,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:21:28,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:21:28,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:21:28,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:21:28,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:21:28,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:21:28,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:21:28,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:21:28,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:21:28,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:21:28,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:21:28,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:21:28,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:21:28,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:21:28,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:21:28,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:21:28,166 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:21:28,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:21:28,167 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:21:28,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:21:28,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:21:28,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:21:28,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:21:28,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:21:28,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:21:28,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:21:28,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:21:28,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:28,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:21:28,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:21:28,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:21:28,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:21:28,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:21:28,171 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:21:28,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:21:28,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:21:28,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:21:28,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b89964825dc5b7831662ee1568f8465e0e5c35795cab8e4e81d90352bde374 [2021-12-21 13:21:28,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:21:28,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:21:28,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:21:28,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:21:28,345 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:21:28,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2021-12-21 13:21:28,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2c9e13d/24134a291b7342428cc1836997bc3621/FLAG544b31d7f [2021-12-21 13:21:28,799 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:21:28,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.3.cil.c [2021-12-21 13:21:28,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2c9e13d/24134a291b7342428cc1836997bc3621/FLAG544b31d7f [2021-12-21 13:21:28,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b2c9e13d/24134a291b7342428cc1836997bc3621 [2021-12-21 13:21:28,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:21:28,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:21:28,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:28,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:21:28,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:21:28,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:28" (1/1) ... [2021-12-21 13:21:28,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5256fa1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:28, skipping insertion in model container [2021-12-21 13:21:28,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:28" (1/1) ... [2021-12-21 13:21:28,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:21:28,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:21:28,965 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.3.cil.c[646,659] [2021-12-21 13:21:29,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:29,086 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:21:29,094 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.3.cil.c[646,659] [2021-12-21 13:21:29,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:29,165 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:21:29,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29 WrapperNode [2021-12-21 13:21:29,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:29,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:29,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:21:29,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:21:29,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,211 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 856 [2021-12-21 13:21:29,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:29,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:21:29,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:21:29,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:21:29,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:21:29,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:21:29,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:21:29,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:21:29,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (1/1) ... [2021-12-21 13:21:29,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:29,280 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) [2021-12-21 13:21:29,285 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 [2021-12-21 13:21:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:21:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:21:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-21 13:21:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-21 13:21:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:21:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:21:29,363 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:21:29,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:21:29,866 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:21:29,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:21:29,874 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-21 13:21:29,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:29 BoogieIcfgContainer [2021-12-21 13:21:29,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:21:29,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:21:29,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:21:29,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:21:29,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:21:28" (1/3) ... [2021-12-21 13:21:29,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c22bb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:29, skipping insertion in model container [2021-12-21 13:21:29,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:29" (2/3) ... [2021-12-21 13:21:29,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c22bb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:29, skipping insertion in model container [2021-12-21 13:21:29,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:29" (3/3) ... [2021-12-21 13:21:29,882 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2021-12-21 13:21:29,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:21:29,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:21:29,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:21:29,918 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 [2021-12-21 13:21:29,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:21:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 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) [2021-12-21 13:21:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 13:21:29,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:29,938 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] [2021-12-21 13:21:29,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash 193087219, now seen corresponding path program 1 times [2021-12-21 13:21:29,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329507306] [2021-12-21 13:21:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:29,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:30,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329507306] [2021-12-21 13:21:30,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329507306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:30,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:30,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:30,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968253675] [2021-12-21 13:21:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:30,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:30,104 INFO L87 Difference]: Start difference. First operand has 275 states, 267 states have (on average 1.853932584269663) internal successors, (495), 273 states have internal predecessors, (495), 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) [2021-12-21 13:21:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:30,340 INFO L93 Difference]: Finished difference Result 724 states and 1329 transitions. [2021-12-21 13:21:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:30,344 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 [2021-12-21 13:21:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:30,359 INFO L225 Difference]: With dead ends: 724 [2021-12-21 13:21:30,359 INFO L226 Difference]: Without dead ends: 446 [2021-12-21 13:21:30,364 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 [2021-12-21 13:21:30,368 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 263 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 781 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 [2021-12-21 13:21:30,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 781 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-21 13:21:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2021-12-21 13:21:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 427 states have (on average 1.5971896955503513) internal successors, (682), 431 states have internal predecessors, (682), 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) [2021-12-21 13:21:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 687 transitions. [2021-12-21 13:21:30,425 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 687 transitions. Word has length 29 [2021-12-21 13:21:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:30,426 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 687 transitions. [2021-12-21 13:21:30,427 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) [2021-12-21 13:21:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 687 transitions. [2021-12-21 13:21:30,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 13:21:30,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:30,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:30,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:21:30,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2107562570, now seen corresponding path program 1 times [2021-12-21 13:21:30,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:30,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235966137] [2021-12-21 13:21:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:30,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:30,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:30,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235966137] [2021-12-21 13:21:30,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235966137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:30,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:30,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:30,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917472688] [2021-12-21 13:21:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:30,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:30,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:30,498 INFO L87 Difference]: Start difference. First operand 433 states and 687 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:30,574 INFO L93 Difference]: Finished difference Result 1137 states and 1829 transitions. [2021-12-21 13:21:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-21 13:21:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:30,577 INFO L225 Difference]: With dead ends: 1137 [2021-12-21 13:21:30,577 INFO L226 Difference]: Without dead ends: 718 [2021-12-21 13:21:30,582 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 [2021-12-21 13:21:30,583 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 326 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1024 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 [2021-12-21 13:21:30,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1024 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-12-21 13:21:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 705. [2021-12-21 13:21:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 699 states have (on average 1.6309012875536482) internal successors, (1140), 703 states have internal predecessors, (1140), 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) [2021-12-21 13:21:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1145 transitions. [2021-12-21 13:21:30,612 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1145 transitions. Word has length 39 [2021-12-21 13:21:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:30,612 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1145 transitions. [2021-12-21 13:21:30,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1145 transitions. [2021-12-21 13:21:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-21 13:21:30,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:30,614 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] [2021-12-21 13:21:30,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:21:30,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 639754325, now seen corresponding path program 1 times [2021-12-21 13:21:30,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:30,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216121807] [2021-12-21 13:21:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:30,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:30,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216121807] [2021-12-21 13:21:30,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216121807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:30,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:30,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:30,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704284932] [2021-12-21 13:21:30,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:30,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:30,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:30,675 INFO L87 Difference]: Start difference. First operand 705 states and 1145 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) [2021-12-21 13:21:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:30,703 INFO L93 Difference]: Finished difference Result 1777 states and 2884 transitions. [2021-12-21 13:21:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:30,703 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 [2021-12-21 13:21:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:30,707 INFO L225 Difference]: With dead ends: 1777 [2021-12-21 13:21:30,707 INFO L226 Difference]: Without dead ends: 1097 [2021-12-21 13:21:30,708 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 [2021-12-21 13:21:30,713 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 353 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 813 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 [2021-12-21 13:21:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 813 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-12-21 13:21:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1086. [2021-12-21 13:21:30,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1080 states have (on average 1.6203703703703705) internal successors, (1750), 1084 states have internal predecessors, (1750), 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) [2021-12-21 13:21:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1755 transitions. [2021-12-21 13:21:30,738 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1755 transitions. Word has length 40 [2021-12-21 13:21:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:30,739 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1755 transitions. [2021-12-21 13:21:30,739 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) [2021-12-21 13:21:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1755 transitions. [2021-12-21 13:21:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 13:21:30,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:30,742 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] [2021-12-21 13:21:30,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:21:30,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:30,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2131746944, now seen corresponding path program 1 times [2021-12-21 13:21:30,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:30,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364232360] [2021-12-21 13:21:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:30,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:30,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364232360] [2021-12-21 13:21:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364232360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:30,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:30,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:30,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867034732] [2021-12-21 13:21:30,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:30,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:30,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:30,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:30,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:30,814 INFO L87 Difference]: Start difference. First operand 1086 states and 1755 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) [2021-12-21 13:21:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:31,048 INFO L93 Difference]: Finished difference Result 2994 states and 4815 transitions. [2021-12-21 13:21:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:21:31,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-21 13:21:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:31,054 INFO L225 Difference]: With dead ends: 2994 [2021-12-21 13:21:31,054 INFO L226 Difference]: Without dead ends: 1933 [2021-12-21 13:21:31,055 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 [2021-12-21 13:21:31,060 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 584 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1566 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 [2021-12-21 13:21:31,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1566 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-12-21 13:21:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1700. [2021-12-21 13:21:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1694 states have (on average 1.5950413223140496) internal successors, (2702), 1698 states have internal predecessors, (2702), 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) [2021-12-21 13:21:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2707 transitions. [2021-12-21 13:21:31,098 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2707 transitions. Word has length 48 [2021-12-21 13:21:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:31,099 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 2707 transitions. [2021-12-21 13:21:31,099 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) [2021-12-21 13:21:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2707 transitions. [2021-12-21 13:21:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:21:31,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:31,100 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] [2021-12-21 13:21:31,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:21:31,101 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799200, now seen corresponding path program 1 times [2021-12-21 13:21:31,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288642682] [2021-12-21 13:21:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:31,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:31,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288642682] [2021-12-21 13:21:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288642682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:31,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:31,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:31,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510221645] [2021-12-21 13:21:31,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:31,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:31,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:31,164 INFO L87 Difference]: Start difference. First operand 1700 states and 2707 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) [2021-12-21 13:21:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:31,447 INFO L93 Difference]: Finished difference Result 5049 states and 7944 transitions. [2021-12-21 13:21:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:21:31,448 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 [2021-12-21 13:21:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:31,458 INFO L225 Difference]: With dead ends: 5049 [2021-12-21 13:21:31,458 INFO L226 Difference]: Without dead ends: 3368 [2021-12-21 13:21:31,460 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 [2021-12-21 13:21:31,461 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 742 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 1056 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 [2021-12-21 13:21:31,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 1056 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-12-21 13:21:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2994. [2021-12-21 13:21:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2988 states have (on average 1.5686077643908969) internal successors, (4687), 2992 states have internal predecessors, (4687), 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) [2021-12-21 13:21:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4692 transitions. [2021-12-21 13:21:31,561 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4692 transitions. Word has length 53 [2021-12-21 13:21:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:31,564 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 4692 transitions. [2021-12-21 13:21:31,564 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) [2021-12-21 13:21:31,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4692 transitions. [2021-12-21 13:21:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:21:31,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:31,567 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] [2021-12-21 13:21:31,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:21:31,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984937, now seen corresponding path program 1 times [2021-12-21 13:21:31,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464230087] [2021-12-21 13:21:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:31,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:31,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:31,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464230087] [2021-12-21 13:21:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464230087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:31,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:31,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:31,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839922738] [2021-12-21 13:21:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:31,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:31,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:31,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:31,623 INFO L87 Difference]: Start difference. First operand 2994 states and 4692 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) [2021-12-21 13:21:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:31,719 INFO L93 Difference]: Finished difference Result 7033 states and 10981 transitions. [2021-12-21 13:21:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:31,720 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 [2021-12-21 13:21:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:31,732 INFO L225 Difference]: With dead ends: 7033 [2021-12-21 13:21:31,732 INFO L226 Difference]: Without dead ends: 4062 [2021-12-21 13:21:31,739 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 [2021-12-21 13:21:31,740 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 368 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 712 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 [2021-12-21 13:21:31,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 712 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2021-12-21 13:21:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 3878. [2021-12-21 13:21:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3872 states have (on average 1.5488119834710743) internal successors, (5997), 3876 states have internal predecessors, (5997), 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) [2021-12-21 13:21:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 6002 transitions. [2021-12-21 13:21:31,860 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 6002 transitions. Word has length 53 [2021-12-21 13:21:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:31,861 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 6002 transitions. [2021-12-21 13:21:31,861 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) [2021-12-21 13:21:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 6002 transitions. [2021-12-21 13:21:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 13:21:31,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:31,863 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] [2021-12-21 13:21:31,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:21:31,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -225924857, now seen corresponding path program 1 times [2021-12-21 13:21:31,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791802320] [2021-12-21 13:21:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:31,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:31,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:31,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791802320] [2021-12-21 13:21:31,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791802320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:31,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:31,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:31,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118901227] [2021-12-21 13:21:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:31,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:31,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:31,906 INFO L87 Difference]: Start difference. First operand 3878 states and 6002 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:32,164 INFO L93 Difference]: Finished difference Result 9322 states and 14548 transitions. [2021-12-21 13:21:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 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 60 [2021-12-21 13:21:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:32,179 INFO L225 Difference]: With dead ends: 9322 [2021-12-21 13:21:32,179 INFO L226 Difference]: Without dead ends: 5467 [2021-12-21 13:21:32,184 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 [2021-12-21 13:21:32,185 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 250 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:32,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 881 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-12-21 13:21:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 4698. [2021-12-21 13:21:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4692 states have (on average 1.4919011082693947) internal successors, (7000), 4696 states have internal predecessors, (7000), 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) [2021-12-21 13:21:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7005 transitions. [2021-12-21 13:21:32,309 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7005 transitions. Word has length 60 [2021-12-21 13:21:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:32,309 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 7005 transitions. [2021-12-21 13:21:32,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7005 transitions. [2021-12-21 13:21:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 13:21:32,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:32,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:32,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:21:32,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -188990245, now seen corresponding path program 1 times [2021-12-21 13:21:32,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891102198] [2021-12-21 13:21:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:32,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:32,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891102198] [2021-12-21 13:21:32,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891102198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:32,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:32,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:32,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382326762] [2021-12-21 13:21:32,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:32,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:32,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:32,335 INFO L87 Difference]: Start difference. First operand 4698 states and 7005 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:32,486 INFO L93 Difference]: Finished difference Result 9239 states and 13787 transitions. [2021-12-21 13:21:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 13:21:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:32,498 INFO L225 Difference]: With dead ends: 9239 [2021-12-21 13:21:32,499 INFO L226 Difference]: Without dead ends: 4564 [2021-12-21 13:21:32,503 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 [2021-12-21 13:21:32,504 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 345 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 443 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 [2021-12-21 13:21:32,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 443 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-12-21 13:21:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 4564. [2021-12-21 13:21:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4558 states have (on average 1.4697235629662133) internal successors, (6699), 4562 states have internal predecessors, (6699), 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) [2021-12-21 13:21:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 6704 transitions. [2021-12-21 13:21:32,627 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 6704 transitions. Word has length 62 [2021-12-21 13:21:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:32,627 INFO L470 AbstractCegarLoop]: Abstraction has 4564 states and 6704 transitions. [2021-12-21 13:21:32,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 6704 transitions. [2021-12-21 13:21:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 13:21:32,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:32,629 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] [2021-12-21 13:21:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:21:32,630 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1119920945, now seen corresponding path program 1 times [2021-12-21 13:21:32,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047527054] [2021-12-21 13:21:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:32,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:32,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047527054] [2021-12-21 13:21:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047527054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:32,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003290329] [2021-12-21 13:21:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:32,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:32,651 INFO L87 Difference]: Start difference. First operand 4564 states and 6704 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) [2021-12-21 13:21:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:32,799 INFO L93 Difference]: Finished difference Result 9772 states and 14526 transitions. [2021-12-21 13:21:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:32,799 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 [2021-12-21 13:21:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:32,813 INFO L225 Difference]: With dead ends: 9772 [2021-12-21 13:21:32,813 INFO L226 Difference]: Without dead ends: 5231 [2021-12-21 13:21:32,818 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 [2021-12-21 13:21:32,818 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 309 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1002 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 [2021-12-21 13:21:32,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1002 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2021-12-21 13:21:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 3514. [2021-12-21 13:21:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3508 states have (on average 1.4871721778791334) internal successors, (5217), 3512 states have internal predecessors, (5217), 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) [2021-12-21 13:21:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5222 transitions. [2021-12-21 13:21:32,907 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5222 transitions. Word has length 63 [2021-12-21 13:21:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:32,908 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 5222 transitions. [2021-12-21 13:21:32,908 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) [2021-12-21 13:21:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5222 transitions. [2021-12-21 13:21:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:21:32,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:32,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:32,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:21:32,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1680343550, now seen corresponding path program 1 times [2021-12-21 13:21:32,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86587064] [2021-12-21 13:21:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:32,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:32,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:32,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86587064] [2021-12-21 13:21:32,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86587064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:32,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:32,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:21:32,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224714564] [2021-12-21 13:21:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:32,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:21:32,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:21:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:32,945 INFO L87 Difference]: Start difference. First operand 3514 states and 5222 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:33,604 INFO L93 Difference]: Finished difference Result 16672 states and 24585 transitions. [2021-12-21 13:21:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 13:21:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 13:21:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:33,635 INFO L225 Difference]: With dead ends: 16672 [2021-12-21 13:21:33,635 INFO L226 Difference]: Without dead ends: 13383 [2021-12-21 13:21:33,646 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 [2021-12-21 13:21:33,646 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 2113 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 4025 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 [2021-12-21 13:21:33,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2113 Valid, 4025 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13383 states. [2021-12-21 13:21:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13383 to 4384. [2021-12-21 13:21:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4378 states have (on average 1.479899497487437) internal successors, (6479), 4382 states have internal predecessors, (6479), 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) [2021-12-21 13:21:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6484 transitions. [2021-12-21 13:21:33,865 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6484 transitions. Word has length 65 [2021-12-21 13:21:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:33,865 INFO L470 AbstractCegarLoop]: Abstraction has 4384 states and 6484 transitions. [2021-12-21 13:21:33,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6484 transitions. [2021-12-21 13:21:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:21:33,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:33,868 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] [2021-12-21 13:21:33,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:21:33,868 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -807318558, now seen corresponding path program 1 times [2021-12-21 13:21:33,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982559053] [2021-12-21 13:21:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:33,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:33,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:33,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982559053] [2021-12-21 13:21:33,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982559053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:33,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:33,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:21:33,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905749937] [2021-12-21 13:21:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:33,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:21:33,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:21:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:21:33,919 INFO L87 Difference]: Start difference. First operand 4384 states and 6484 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-12-21 13:21:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:35,103 INFO L93 Difference]: Finished difference Result 30283 states and 44507 transitions. [2021-12-21 13:21:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 13:21:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 [2021-12-21 13:21:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:35,208 INFO L225 Difference]: With dead ends: 30283 [2021-12-21 13:21:35,208 INFO L226 Difference]: Without dead ends: 26124 [2021-12-21 13:21:35,219 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 [2021-12-21 13:21:35,220 INFO L933 BasicCegarLoop]: 1877 mSDtfsCounter, 3813 mSDsluCounter, 6758 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 8635 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:35,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3813 Valid, 8635 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26124 states. [2021-12-21 13:21:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26124 to 4694. [2021-12-21 13:21:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 4688 states have (on average 1.4699232081911262) internal successors, (6891), 4692 states have internal predecessors, (6891), 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) [2021-12-21 13:21:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6896 transitions. [2021-12-21 13:21:35,530 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6896 transitions. Word has length 66 [2021-12-21 13:21:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:35,531 INFO L470 AbstractCegarLoop]: Abstraction has 4694 states and 6896 transitions. [2021-12-21 13:21:35,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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) [2021-12-21 13:21:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6896 transitions. [2021-12-21 13:21:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:21:35,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:35,536 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] [2021-12-21 13:21:35,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:21:35,536 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 365229683, now seen corresponding path program 1 times [2021-12-21 13:21:35,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:35,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675677246] [2021-12-21 13:21:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:35,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:35,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:35,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675677246] [2021-12-21 13:21:35,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675677246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:35,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:35,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:35,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208965090] [2021-12-21 13:21:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:35,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:35,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:35,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:35,559 INFO L87 Difference]: Start difference. First operand 4694 states and 6896 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) [2021-12-21 13:21:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:35,806 INFO L93 Difference]: Finished difference Result 9887 states and 14496 transitions. [2021-12-21 13:21:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:35,807 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 [2021-12-21 13:21:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:35,815 INFO L225 Difference]: With dead ends: 9887 [2021-12-21 13:21:35,815 INFO L226 Difference]: Without dead ends: 5214 [2021-12-21 13:21:35,820 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 [2021-12-21 13:21:35,821 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 135 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 818 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 [2021-12-21 13:21:35,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 818 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-12-21 13:21:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5140. [2021-12-21 13:21:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5140 states, 5134 states have (on average 1.4649396182313985) internal successors, (7521), 5138 states have internal predecessors, (7521), 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) [2021-12-21 13:21:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5140 states to 5140 states and 7526 transitions. [2021-12-21 13:21:36,014 INFO L78 Accepts]: Start accepts. Automaton has 5140 states and 7526 transitions. Word has length 79 [2021-12-21 13:21:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 5140 states and 7526 transitions. [2021-12-21 13:21:36,015 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) [2021-12-21 13:21:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5140 states and 7526 transitions. [2021-12-21 13:21:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 13:21:36,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:36,017 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] [2021-12-21 13:21:36,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:21:36,018 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1737999967, now seen corresponding path program 1 times [2021-12-21 13:21:36,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135010002] [2021-12-21 13:21:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:36,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:36,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135010002] [2021-12-21 13:21:36,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135010002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:36,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:36,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:36,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797070710] [2021-12-21 13:21:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:36,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:36,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:36,041 INFO L87 Difference]: Start difference. First operand 5140 states and 7526 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) [2021-12-21 13:21:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:36,578 INFO L93 Difference]: Finished difference Result 13742 states and 19960 transitions. [2021-12-21 13:21:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:21:36,579 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 [2021-12-21 13:21:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:36,592 INFO L225 Difference]: With dead ends: 13742 [2021-12-21 13:21:36,592 INFO L226 Difference]: Without dead ends: 8501 [2021-12-21 13:21:36,598 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 [2021-12-21 13:21:36,600 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 650 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1264 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 [2021-12-21 13:21:36,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 1264 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-12-21 13:21:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 7603. [2021-12-21 13:21:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 7597 states have (on average 1.4359615637751744) internal successors, (10909), 7601 states have internal predecessors, (10909), 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) [2021-12-21 13:21:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 10914 transitions. [2021-12-21 13:21:36,981 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 10914 transitions. Word has length 91 [2021-12-21 13:21:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:36,981 INFO L470 AbstractCegarLoop]: Abstraction has 7603 states and 10914 transitions. [2021-12-21 13:21:36,982 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) [2021-12-21 13:21:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 10914 transitions. [2021-12-21 13:21:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:21:36,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:36,984 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] [2021-12-21 13:21:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:21:36,985 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1393219568, now seen corresponding path program 1 times [2021-12-21 13:21:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:36,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122645344] [2021-12-21 13:21:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:36,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:37,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122645344] [2021-12-21 13:21:37,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122645344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:37,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:37,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:37,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941790354] [2021-12-21 13:21:37,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:37,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:37,024 INFO L87 Difference]: Start difference. First operand 7603 states and 10914 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) [2021-12-21 13:21:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:37,234 INFO L93 Difference]: Finished difference Result 10973 states and 15786 transitions. [2021-12-21 13:21:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:37,235 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 [2021-12-21 13:21:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:37,241 INFO L225 Difference]: With dead ends: 10973 [2021-12-21 13:21:37,241 INFO L226 Difference]: Without dead ends: 3373 [2021-12-21 13:21:37,250 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 [2021-12-21 13:21:37,250 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 339 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 521 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 [2021-12-21 13:21:37,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 521 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-12-21 13:21:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 3320. [2021-12-21 13:21:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3314 states have (on average 1.347616173808087) internal successors, (4466), 3318 states have internal predecessors, (4466), 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) [2021-12-21 13:21:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4471 transitions. [2021-12-21 13:21:37,384 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4471 transitions. Word has length 99 [2021-12-21 13:21:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:37,384 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 4471 transitions. [2021-12-21 13:21:37,384 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) [2021-12-21 13:21:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4471 transitions. [2021-12-21 13:21:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:21:37,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:37,386 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] [2021-12-21 13:21:37,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:21:37,386 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 759271656, now seen corresponding path program 1 times [2021-12-21 13:21:37,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271254374] [2021-12-21 13:21:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:37,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:37,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:37,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271254374] [2021-12-21 13:21:37,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271254374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:37,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:37,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:21:37,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780179189] [2021-12-21 13:21:37,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:37,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:21:37,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:21:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:37,414 INFO L87 Difference]: Start difference. First operand 3320 states and 4471 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) [2021-12-21 13:21:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:37,867 INFO L93 Difference]: Finished difference Result 12700 states and 17100 transitions. [2021-12-21 13:21:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:37,868 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 [2021-12-21 13:21:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:37,884 INFO L225 Difference]: With dead ends: 12700 [2021-12-21 13:21:37,885 INFO L226 Difference]: Without dead ends: 9557 [2021-12-21 13:21:37,891 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 [2021-12-21 13:21:37,891 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 1536 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 3386 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 [2021-12-21 13:21:37,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 3386 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2021-12-21 13:21:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 3322. [2021-12-21 13:21:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3316 states have (on average 1.3455971049457178) internal successors, (4462), 3320 states have internal predecessors, (4462), 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) [2021-12-21 13:21:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4467 transitions. [2021-12-21 13:21:38,076 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4467 transitions. Word has length 101 [2021-12-21 13:21:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:38,076 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 4467 transitions. [2021-12-21 13:21:38,076 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) [2021-12-21 13:21:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4467 transitions. [2021-12-21 13:21:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:21:38,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:38,078 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] [2021-12-21 13:21:38,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:21:38,078 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1438592349, now seen corresponding path program 1 times [2021-12-21 13:21:38,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67541344] [2021-12-21 13:21:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:38,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:38,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:38,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67541344] [2021-12-21 13:21:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67541344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247900292] [2021-12-21 13:21:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:38,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:38,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:38,111 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) [2021-12-21 13:21:38,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:21:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:38,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:38,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247900292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:38,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446899115] [2021-12-21 13:21:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:38,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:38,402 INFO L87 Difference]: Start difference. First operand 3322 states and 4467 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) [2021-12-21 13:21:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:38,600 INFO L93 Difference]: Finished difference Result 3961 states and 5320 transitions. [2021-12-21 13:21:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:38,601 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 [2021-12-21 13:21:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:38,608 INFO L225 Difference]: With dead ends: 3961 [2021-12-21 13:21:38,609 INFO L226 Difference]: Without dead ends: 3957 [2021-12-21 13:21:38,611 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 [2021-12-21 13:21:38,611 INFO L933 BasicCegarLoop]: 433 mSDtfsCounter, 233 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 803 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 [2021-12-21 13:21:38,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 803 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-12-21 13:21:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3907. [2021-12-21 13:21:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3901 states have (on average 1.3424762881312484) internal successors, (5237), 3905 states have internal predecessors, (5237), 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) [2021-12-21 13:21:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5242 transitions. [2021-12-21 13:21:38,849 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5242 transitions. Word has length 103 [2021-12-21 13:21:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:38,850 INFO L470 AbstractCegarLoop]: Abstraction has 3907 states and 5242 transitions. [2021-12-21 13:21:38,850 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) [2021-12-21 13:21:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5242 transitions. [2021-12-21 13:21:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-21 13:21:38,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:38,852 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] [2021-12-21 13:21:38,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:39,068 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 [2021-12-21 13:21:39,069 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 778344586, now seen corresponding path program 1 times [2021-12-21 13:21:39,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579911376] [2021-12-21 13:21:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:39,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579911376] [2021-12-21 13:21:39,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579911376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838901378] [2021-12-21 13:21:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:39,106 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) [2021-12-21 13:21:39,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:21:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:39,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:39,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838901378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:39,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:39,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:39,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964440017] [2021-12-21 13:21:39,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:39,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:39,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:39,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:39,423 INFO L87 Difference]: Start difference. First operand 3907 states and 5242 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) [2021-12-21 13:21:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:39,598 INFO L93 Difference]: Finished difference Result 6958 states and 9384 transitions. [2021-12-21 13:21:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:39,598 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 158 [2021-12-21 13:21:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:39,604 INFO L225 Difference]: With dead ends: 6958 [2021-12-21 13:21:39,604 INFO L226 Difference]: Without dead ends: 3056 [2021-12-21 13:21:39,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:39,609 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 264 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 422 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 [2021-12-21 13:21:39,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 422 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-12-21 13:21:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2834. [2021-12-21 13:21:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.322135785007072) internal successors, (3739), 2832 states have internal predecessors, (3739), 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) [2021-12-21 13:21:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3744 transitions. [2021-12-21 13:21:39,756 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3744 transitions. Word has length 158 [2021-12-21 13:21:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:39,757 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 3744 transitions. [2021-12-21 13:21:39,757 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) [2021-12-21 13:21:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3744 transitions. [2021-12-21 13:21:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-21 13:21:39,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:39,759 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] [2021-12-21 13:21:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:39,975 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 [2021-12-21 13:21:39,976 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1723152090, now seen corresponding path program 1 times [2021-12-21 13:21:39,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766822390] [2021-12-21 13:21:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:40,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766822390] [2021-12-21 13:21:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766822390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:40,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285261638] [2021-12-21 13:21:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:40,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:40,025 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) [2021-12-21 13:21:40,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:21:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:21:40,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285261638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:40,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:40,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:40,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443370765] [2021-12-21 13:21:40,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:40,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:40,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:40,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:40,316 INFO L87 Difference]: Start difference. First operand 2834 states and 3744 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:40,488 INFO L93 Difference]: Finished difference Result 5496 states and 7301 transitions. [2021-12-21 13:21:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-21 13:21:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:40,493 INFO L225 Difference]: With dead ends: 5496 [2021-12-21 13:21:40,493 INFO L226 Difference]: Without dead ends: 2834 [2021-12-21 13:21:40,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:40,497 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 394 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 [2021-12-21 13:21:40,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 394 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-12-21 13:21:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2834. [2021-12-21 13:21:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2828 states have (on average 1.2881895332390383) internal successors, (3643), 2832 states have internal predecessors, (3643), 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) [2021-12-21 13:21:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3648 transitions. [2021-12-21 13:21:40,683 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3648 transitions. Word has length 161 [2021-12-21 13:21:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:40,684 INFO L470 AbstractCegarLoop]: Abstraction has 2834 states and 3648 transitions. [2021-12-21 13:21:40,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3648 transitions. [2021-12-21 13:21:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-21 13:21:40,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:40,686 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] [2021-12-21 13:21:40,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:40,903 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 [2021-12-21 13:21:40,903 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 901617889, now seen corresponding path program 1 times [2021-12-21 13:21:40,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:40,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465262660] [2021-12-21 13:21:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:40,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:40,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465262660] [2021-12-21 13:21:40,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465262660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:40,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369482687] [2021-12-21 13:21:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:40,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:40,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:40,972 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) [2021-12-21 13:21:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:21:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:21:41,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:41,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369482687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:41,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:41,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:41,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336783537] [2021-12-21 13:21:41,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:41,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:41,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:41,227 INFO L87 Difference]: Start difference. First operand 2834 states and 3648 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:41,604 INFO L93 Difference]: Finished difference Result 6407 states and 8410 transitions. [2021-12-21 13:21:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-12-21 13:21:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:41,611 INFO L225 Difference]: With dead ends: 6407 [2021-12-21 13:21:41,611 INFO L226 Difference]: Without dead ends: 3745 [2021-12-21 13:21:41,615 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 [2021-12-21 13:21:41,616 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 205 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:41,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 664 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-12-21 13:21:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3657. [2021-12-21 13:21:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3651 states have (on average 1.256368118323747) internal successors, (4587), 3655 states have internal predecessors, (4587), 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) [2021-12-21 13:21:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 4592 transitions. [2021-12-21 13:21:41,820 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 4592 transitions. Word has length 162 [2021-12-21 13:21:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:41,820 INFO L470 AbstractCegarLoop]: Abstraction has 3657 states and 4592 transitions. [2021-12-21 13:21:41,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 4592 transitions. [2021-12-21 13:21:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-21 13:21:41,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:41,822 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] [2021-12-21 13:21:41,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:42,041 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 [2021-12-21 13:21:42,041 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:42,041 INFO L85 PathProgramCache]: Analyzing trace with hash -89319700, now seen corresponding path program 1 times [2021-12-21 13:21:42,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:42,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331199532] [2021-12-21 13:21:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:42,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:42,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:42,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331199532] [2021-12-21 13:21:42,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331199532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:42,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852833197] [2021-12-21 13:21:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:42,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:42,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:42,132 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) [2021-12-21 13:21:42,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:21:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 13:21:42,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:42,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852833197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:42,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-21 13:21:42,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321569438] [2021-12-21 13:21:42,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:42,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:42,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:42,887 INFO L87 Difference]: Start difference. First operand 3657 states and 4592 transitions. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:44,464 INFO L93 Difference]: Finished difference Result 18372 states and 23167 transitions. [2021-12-21 13:21:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 13:21:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-21 13:21:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:44,491 INFO L225 Difference]: With dead ends: 18372 [2021-12-21 13:21:44,492 INFO L226 Difference]: Without dead ends: 14887 [2021-12-21 13:21:44,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 337 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 13:21:44,502 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 4105 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4105 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:44,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4105 Valid, 5617 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14887 states. [2021-12-21 13:21:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14887 to 5182. [2021-12-21 13:21:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5176 states have (on average 1.2612055641421946) internal successors, (6528), 5180 states have internal predecessors, (6528), 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) [2021-12-21 13:21:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 6533 transitions. [2021-12-21 13:21:44,920 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 6533 transitions. Word has length 164 [2021-12-21 13:21:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:44,921 INFO L470 AbstractCegarLoop]: Abstraction has 5182 states and 6533 transitions. [2021-12-21 13:21:44,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 6533 transitions. [2021-12-21 13:21:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-21 13:21:44,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:44,923 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] [2021-12-21 13:21:44,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 13:21:45,141 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 [2021-12-21 13:21:45,141 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1160504422, now seen corresponding path program 1 times [2021-12-21 13:21:45,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732608978] [2021-12-21 13:21:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:45,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:45,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732608978] [2021-12-21 13:21:45,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732608978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:45,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038665288] [2021-12-21 13:21:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:45,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:45,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:45,272 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) [2021-12-21 13:21:45,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 13:21:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 13:21:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:46,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038665288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:46,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-21 13:21:46,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169152794] [2021-12-21 13:21:46,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:46,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:21:46,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:46,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:21:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:21:46,678 INFO L87 Difference]: Start difference. First operand 5182 states and 6533 transitions. Second operand has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:48,788 INFO L93 Difference]: Finished difference Result 23920 states and 30076 transitions. [2021-12-21 13:21:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-21 13:21:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-12-21 13:21:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:48,819 INFO L225 Difference]: With dead ends: 23920 [2021-12-21 13:21:48,819 INFO L226 Difference]: Without dead ends: 18910 [2021-12-21 13:21:48,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 541 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 13:21:48,830 INFO L933 BasicCegarLoop]: 1466 mSDtfsCounter, 5735 mSDsluCounter, 10170 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 11636 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:48,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5735 Valid, 11636 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:21:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18910 states. [2021-12-21 13:21:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18910 to 6581. [2021-12-21 13:21:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6575 states have (on average 1.2622053231939163) internal successors, (8299), 6579 states have internal predecessors, (8299), 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) [2021-12-21 13:21:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8304 transitions. [2021-12-21 13:21:49,374 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8304 transitions. Word has length 264 [2021-12-21 13:21:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:49,374 INFO L470 AbstractCegarLoop]: Abstraction has 6581 states and 8304 transitions. [2021-12-21 13:21:49,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.454545454545453) internal successors, (258), 11 states have internal predecessors, (258), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8304 transitions. [2021-12-21 13:21:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-12-21 13:21:49,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:49,378 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] [2021-12-21 13:21:49,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:49,591 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 [2021-12-21 13:21:49,593 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1649884656, now seen corresponding path program 1 times [2021-12-21 13:21:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068465377] [2021-12-21 13:21:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:49,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 268 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:21:49,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068465377] [2021-12-21 13:21:49,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068465377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774544928] [2021-12-21 13:21:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:49,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:49,679 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) [2021-12-21 13:21:49,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 13:21:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 13:21:49,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:21:50,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:50,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774544928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:50,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:50,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 11 [2021-12-21 13:21:50,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287283840] [2021-12-21 13:21:50,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:50,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:50,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:21:50,326 INFO L87 Difference]: Start difference. First operand 6581 states and 8304 transitions. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:51,176 INFO L93 Difference]: Finished difference Result 14921 states and 18796 transitions. [2021-12-21 13:21:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:21:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 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 365 [2021-12-21 13:21:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:51,188 INFO L225 Difference]: With dead ends: 14921 [2021-12-21 13:21:51,189 INFO L226 Difference]: Without dead ends: 8509 [2021-12-21 13:21:51,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:21:51,198 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 2073 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 4071 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:51,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2073 Valid, 4071 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8509 states. [2021-12-21 13:21:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8509 to 6450. [2021-12-21 13:21:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6444 states have (on average 1.260552451893234) internal successors, (8123), 6448 states have internal predecessors, (8123), 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) [2021-12-21 13:21:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 8128 transitions. [2021-12-21 13:21:51,750 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 8128 transitions. Word has length 365 [2021-12-21 13:21:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:51,750 INFO L470 AbstractCegarLoop]: Abstraction has 6450 states and 8128 transitions. [2021-12-21 13:21:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 8128 transitions. [2021-12-21 13:21:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-12-21 13:21:51,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:51,754 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:51,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:51,967 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 [2021-12-21 13:21:51,968 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 212538691, now seen corresponding path program 1 times [2021-12-21 13:21:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078092509] [2021-12-21 13:21:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:51,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-12-21 13:21:52,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078092509] [2021-12-21 13:21:52,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078092509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:52,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:52,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:52,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491914934] [2021-12-21 13:21:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:52,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:52,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:52,012 INFO L87 Difference]: Start difference. First operand 6450 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:52,207 INFO L93 Difference]: Finished difference Result 7707 states and 9551 transitions. [2021-12-21 13:21:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 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 [2021-12-21 13:21:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:52,209 INFO L225 Difference]: With dead ends: 7707 [2021-12-21 13:21:52,209 INFO L226 Difference]: Without dead ends: 1310 [2021-12-21 13:21:52,213 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 [2021-12-21 13:21:52,214 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 134 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:52,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 396 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-21 13:21:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1307. [2021-12-21 13:21:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1303 states have (on average 1.091327705295472) internal successors, (1422), 1305 states have internal predecessors, (1422), 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) [2021-12-21 13:21:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1425 transitions. [2021-12-21 13:21:52,324 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1425 transitions. Word has length 366 [2021-12-21 13:21:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:52,325 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 1425 transitions. [2021-12-21 13:21:52,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1425 transitions. [2021-12-21 13:21:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-21 13:21:52,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:52,327 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:52,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:21:52,327 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1278053055, now seen corresponding path program 1 times [2021-12-21 13:21:52,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:52,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74207937] [2021-12-21 13:21:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:52,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-12-21 13:21:52,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74207937] [2021-12-21 13:21:52,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74207937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:52,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:21:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670612159] [2021-12-21 13:21:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:21:52,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:21:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:21:52,385 INFO L87 Difference]: Start difference. First operand 1307 states and 1425 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:52,667 INFO L93 Difference]: Finished difference Result 2682 states and 2939 transitions. [2021-12-21 13:21:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:21:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 367 [2021-12-21 13:21:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:52,674 INFO L225 Difference]: With dead ends: 2682 [2021-12-21 13:21:52,674 INFO L226 Difference]: Without dead ends: 2177 [2021-12-21 13:21:52,675 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 [2021-12-21 13:21:52,676 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 906 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:52,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 2474 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2021-12-21 13:21:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1303. [2021-12-21 13:21:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1299 states have (on average 1.0869899923017705) internal successors, (1412), 1301 states have internal predecessors, (1412), 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) [2021-12-21 13:21:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1415 transitions. [2021-12-21 13:21:52,792 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1415 transitions. Word has length 367 [2021-12-21 13:21:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:52,793 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 1415 transitions. [2021-12-21 13:21:52,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1415 transitions. [2021-12-21 13:21:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-21 13:21:52,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:52,795 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:52,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 13:21:52,795 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash -393422015, now seen corresponding path program 1 times [2021-12-21 13:21:52,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:52,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360139817] [2021-12-21 13:21:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:52,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2021-12-21 13:21:52,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:52,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360139817] [2021-12-21 13:21:52,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360139817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:52,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:52,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:21:52,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278812330] [2021-12-21 13:21:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:52,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:21:52,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:21:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:52,845 INFO L87 Difference]: Start difference. First operand 1303 states and 1415 transitions. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:53,023 INFO L93 Difference]: Finished difference Result 2148 states and 2344 transitions. [2021-12-21 13:21:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:21:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 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 368 [2021-12-21 13:21:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:53,026 INFO L225 Difference]: With dead ends: 2148 [2021-12-21 13:21:53,026 INFO L226 Difference]: Without dead ends: 1641 [2021-12-21 13:21:53,027 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 [2021-12-21 13:21:53,028 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 438 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 925 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 [2021-12-21 13:21:53,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 925 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-12-21 13:21:53,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1272. [2021-12-21 13:21:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0654058313632782) internal successors, (1352), 1270 states have internal predecessors, (1352), 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) [2021-12-21 13:21:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1354 transitions. [2021-12-21 13:21:53,144 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1354 transitions. Word has length 368 [2021-12-21 13:21:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:53,144 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1354 transitions. [2021-12-21 13:21:53,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1354 transitions. [2021-12-21 13:21:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-12-21 13:21:53,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:53,146 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:53,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:21:53,147 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1783235049, now seen corresponding path program 1 times [2021-12-21 13:21:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:53,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504210700] [2021-12-21 13:21:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:53,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 229 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-21 13:21:53,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504210700] [2021-12-21 13:21:53,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504210700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115148715] [2021-12-21 13:21:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:53,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:53,447 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) [2021-12-21 13:21:53,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 13:21:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 13:21:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 68 proven. 193 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-21 13:21:54,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 20 proven. 241 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-21 13:21:55,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115148715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:55,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:55,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-21 13:21:55,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070543434] [2021-12-21 13:21:55,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:55,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 13:21:55,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 13:21:55,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-21 13:21:55,406 INFO L87 Difference]: Start difference. First operand 1272 states and 1354 transitions. Second operand has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:56,181 INFO L93 Difference]: Finished difference Result 1594 states and 1700 transitions. [2021-12-21 13:21:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 13:21:56,181 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 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 426 [2021-12-21 13:21:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:56,184 INFO L225 Difference]: With dead ends: 1594 [2021-12-21 13:21:56,184 INFO L226 Difference]: Without dead ends: 1591 [2021-12-21 13:21:56,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 845 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 13:21:56,185 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 2563 mSDsluCounter, 6928 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 7321 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:56,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2563 Valid, 7321 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-12-21 13:21:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1272. [2021-12-21 13:21:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1269 states have (on average 1.0646178092986605) internal successors, (1351), 1270 states have internal predecessors, (1351), 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) [2021-12-21 13:21:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1353 transitions. [2021-12-21 13:21:56,319 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1353 transitions. Word has length 426 [2021-12-21 13:21:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1353 transitions. [2021-12-21 13:21:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.833333333333334) internal successors, (415), 30 states have internal predecessors, (415), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1353 transitions. [2021-12-21 13:21:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-12-21 13:21:56,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:56,323 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:56,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:56,539 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 [2021-12-21 13:21:56,540 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 147062529, now seen corresponding path program 1 times [2021-12-21 13:21:56,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:56,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357781410] [2021-12-21 13:21:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:56,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-21 13:21:56,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357781410] [2021-12-21 13:21:56,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357781410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294769828] [2021-12-21 13:21:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:56,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:56,690 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) [2021-12-21 13:21:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 13:21:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 13:21:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-21 13:21:57,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 210 proven. 48 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-21 13:21:58,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294769828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:58,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:58,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-21 13:21:58,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686180516] [2021-12-21 13:21:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:58,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:58,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:58,019 INFO L87 Difference]: Start difference. First operand 1272 states and 1353 transitions. Second operand has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:58,370 INFO L93 Difference]: Finished difference Result 1915 states and 2040 transitions. [2021-12-21 13:21:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 13:21:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-12-21 13:21:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:58,374 INFO L225 Difference]: With dead ends: 1915 [2021-12-21 13:21:58,374 INFO L226 Difference]: Without dead ends: 1621 [2021-12-21 13:21:58,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 951 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-21 13:21:58,375 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 1121 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:58,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 3355 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-12-21 13:21:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1270. [2021-12-21 13:21:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.0599842146803473) internal successors, (1343), 1268 states have internal predecessors, (1343), 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) [2021-12-21 13:21:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1345 transitions. [2021-12-21 13:21:58,509 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1345 transitions. Word has length 474 [2021-12-21 13:21:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:58,509 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1345 transitions. [2021-12-21 13:21:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.88888888888889) internal successors, (278), 9 states have internal predecessors, (278), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1345 transitions. [2021-12-21 13:21:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-12-21 13:21:58,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:58,513 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:58,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:58,727 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 [2021-12-21 13:21:58,728 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1610767197, now seen corresponding path program 1 times [2021-12-21 13:21:58,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:58,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144993002] [2021-12-21 13:21:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:58,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 126 proven. 575 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 13:21:59,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144993002] [2021-12-21 13:21:59,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144993002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446989656] [2021-12-21 13:21:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:59,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:59,021 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) [2021-12-21 13:21:59,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 13:21:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 13:21:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 167 proven. 516 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 13:22:00,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 25 proven. 658 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 13:22:01,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446989656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:01,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:01,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-21 13:22:01,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785514401] [2021-12-21 13:22:01,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:01,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 13:22:01,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 13:22:01,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 13:22:01,351 INFO L87 Difference]: Start difference. First operand 1270 states and 1345 transitions. Second operand has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:02,233 INFO L93 Difference]: Finished difference Result 1523 states and 1615 transitions. [2021-12-21 13:22:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-21 13:22:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 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 534 [2021-12-21 13:22:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:02,236 INFO L225 Difference]: With dead ends: 1523 [2021-12-21 13:22:02,236 INFO L226 Difference]: Without dead ends: 1520 [2021-12-21 13:22:02,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1065 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2021-12-21 13:22:02,238 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 2787 mSDsluCounter, 13408 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 14040 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:02,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 14040 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:22:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-12-21 13:22:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1270. [2021-12-21 13:22:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1267 states have (on average 1.059194948697711) internal successors, (1342), 1268 states have internal predecessors, (1342), 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) [2021-12-21 13:22:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1344 transitions. [2021-12-21 13:22:02,372 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1344 transitions. Word has length 534 [2021-12-21 13:22:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:02,372 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1344 transitions. [2021-12-21 13:22:02,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.735294117647058) internal successors, (705), 34 states have internal predecessors, (705), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1344 transitions. [2021-12-21 13:22:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-12-21 13:22:02,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:02,376 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:02,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:02,583 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 [2021-12-21 13:22:02,584 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1331699829, now seen corresponding path program 1 times [2021-12-21 13:22:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619303920] [2021-12-21 13:22:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:02,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-21 13:22:02,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619303920] [2021-12-21 13:22:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619303920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367416198] [2021-12-21 13:22:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:02,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:02,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:02,729 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) [2021-12-21 13:22:02,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 13:22:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 13:22:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-21 13:22:03,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 355 proven. 212 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-21 13:22:04,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367416198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:04,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:04,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-21 13:22:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120079005] [2021-12-21 13:22:04,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:04,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:22:04,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:22:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:22:04,580 INFO L87 Difference]: Start difference. First operand 1270 states and 1344 transitions. Second operand has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:04,976 INFO L93 Difference]: Finished difference Result 1630 states and 1731 transitions. [2021-12-21 13:22:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 13:22:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 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 582 [2021-12-21 13:22:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:04,979 INFO L225 Difference]: With dead ends: 1630 [2021-12-21 13:22:04,979 INFO L226 Difference]: Without dead ends: 1526 [2021-12-21 13:22:04,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 1169 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-21 13:22:04,980 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 1204 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 5194 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:04,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 5194 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:22:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-12-21 13:22:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1269. [2021-12-21 13:22:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1267 states have (on average 1.0544593528018942) internal successors, (1336), 1267 states have internal predecessors, (1336), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1337 transitions. [2021-12-21 13:22:05,116 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1337 transitions. Word has length 582 [2021-12-21 13:22:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:05,116 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1337 transitions. [2021-12-21 13:22:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 11 states have internal predecessors, (384), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1337 transitions. [2021-12-21 13:22:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2021-12-21 13:22:05,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:05,121 INFO L514 BasicCegarLoop]: trace histogram [12, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:05,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:05,339 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 [2021-12-21 13:22:05,340 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash 707297678, now seen corresponding path program 1 times [2021-12-21 13:22:05,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:05,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552509732] [2021-12-21 13:22:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:05,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 83 proven. 1033 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:05,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552509732] [2021-12-21 13:22:05,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552509732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793756563] [2021-12-21 13:22:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:05,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:05,739 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) [2021-12-21 13:22:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 13:22:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 13:22:05,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 174 proven. 942 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 30 proven. 1086 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:08,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793756563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:08,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:08,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-12-21 13:22:08,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902869701] [2021-12-21 13:22:08,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:08,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 13:22:08,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 13:22:08,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 13:22:08,803 INFO L87 Difference]: Start difference. First operand 1269 states and 1337 transitions. Second operand has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:10,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:10,037 INFO L93 Difference]: Finished difference Result 1526 states and 1612 transitions. [2021-12-21 13:22:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-21 13:22:10,038 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 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 643 [2021-12-21 13:22:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:10,038 INFO L225 Difference]: With dead ends: 1526 [2021-12-21 13:22:10,038 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 13:22:10,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1289 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=5712, Unknown=0, NotChecked=0, Total=6320 [2021-12-21 13:22:10,041 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 3599 mSDsluCounter, 19463 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 20265 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:10,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3599 Valid, 20265 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:22:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 13:22:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 13:22:10,042 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) [2021-12-21 13:22:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 13:22:10,042 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 643 [2021-12-21 13:22:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:10,042 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 13:22:10,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 24.35) internal successors, (974), 40 states have internal predecessors, (974), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 13:22:10,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 13:22:10,045 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 13:22:10,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:10,245 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 [2021-12-21 13:22:10,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 13:22:19,224 WARN L227 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 442 DAG size of output: 442 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)